Transformers Committee Chair: Stephen Antosz Vice Chair: Sue McNelly Secretary: Bruce Forsyth Treasurer: Greg Anderson Awards Chair/Past Chair: Don Platts Standards Coordinator: Jim Graham IEEE/PES Transformers Committee Spring 2016 Meeting Minutes Atlanta, Georgia, USA March 21, 2016 Unapproved (These minutes are on the agenda to be approved at the next meeting in Fall 2016)
243
Embed
IEEE/PES Transformers Committeegrouper.ieee.org/groups/transformers/meetings/S2016...Atlanta, Georgia, USA March 21, 2016 Unapproved (These minutes are on the agenda to be approved
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Transformers Committee
Chair: Stephen Antosz Vice Chair: Sue McNelly Secretary: Bruce Forsyth
Treasurer: Greg Anderson Awards Chair/Past Chair: Don Platts Standards Coordinator: Jim Graham
IEEE/PES
Transformers
Committee
Spring 2016 Meeting Minutes
Atlanta, Georgia, USA
March 21, 2016
Unapproved (These minutes are on the agenda to be approved at the next meeting in Fall 2016)
Page 2 of 57
UTABLE OF CONTENTS
UOPENING SESSION – MONDAY MARCH 21, 2016
1.0 Agenda
2.0 Attendance
3.0 Approval of Agenda and Previous Minutes – Stephen Antosz
4.0 Meeting Schedule
5.0 Chair’s Remarks & Report – Stephen Antosz
6.0 Vice Chair’s Report – Susan McNelly
7.0 Secretary’s Report – Bruce Forsyth
8.0 Treasurer’s Report – Gregory Anderson
9.0 Awards Report – Don Platts
10.0 Administrative SC Meeting Report – Stephen Antosz
11.0 Standards Report – Jim Graham
12.0 Editor’s Report – Sanjib Som
13.0 Liaison Reports
13.1. IEC TC14 Technical Advisor to USNC – Phil Hopkinson
13.2. Standards Coordinating Committee No. 18 (NFPA/NEC) – Ned Brush
The SC approved a motion to produce a PAR for guide related to short-circuit design criterion. Other details
are contained within the full meeting minutes.
19.12 POWER TRANSFORMERS SC (JOE WATSON)
A TF to review the relationship between V/Hz and excitation was formed. A proposal to proceed with the
development of a joint IEC/IEEE application guide for LTCs. The C57.140 revision is ready for ballot and
the SC approved doing so. A proposal to proceed with a PAR for C57.148 was approved. The SC approved
proceeding with the formation of a TF to investigate revisions to the transportation guide.
20.0 REPORTS FROM STANDARDS SUBCOMMITTEE AND STANDARDS (ISSUES FROM THE WEEK)
Some people have reported problems working with the MyBallot tools and those concerns will be addressed.
Members are encouraged to contact Jim Graham if they have problems.
21.0 NEW BUSINESS
21.1 INTERNATIONAL TRAVEL REQUIREMENTS
A member shared his experience related to travelling internationally to attend IEEE meetings. Greg
Anderson reported that he frequently provides a welcome letter for attendees from certain countries. He
reminded US citizens that a passport will be required to travel to the next meeting in Vancouver. Greg also
advised that passports generally need to be valid for 6-months beyond the arrival date.
22.0 THURSDAY GENERAL SESSION ADJOURNMENT
The meeting was adjourned at 12:00 PM.
ANNEX A Bushings Subcommittee March 23, 2016 Atlanta, Georgia USA
Chair: Peter Zhao was unable to attend, therefore Eric Weatherbee filled in as Chair for this meeting Secretary: Eric Weatherbee, Keith Ellis filled in as Secretary for this meeting
A.1 Opening of the Meeting A.1.1 Introductions
The Chair opened the meeting with group introduction.
A.1.2 Attendance
Membership count was taken with the following results: 27 of 42 members were present with 82 guests, for a total of 109 attendees. There were 8 new membership requests. There was a quorum.
A.1.3 Chairman’s Remarks
The Chair asked for a motion to approve the meeting agenda that was distributed prior to the meeting, a motion was made and seconded with no objections.
The Chair asked for a motion to approve the S15 Memphis minutes that was distributed prior to the meeting, a motion was made and seconded with no objections.
The Chair asked that guest’s take careful consideration before asking for membership in the groups. There were a couple bushings meetings that did not have membership in attendance to have a quorum. Before asking for membership they should be confident in their ability to attend meetings regularly, as their absence can stymie progression of the entire group if a quorum cannot be formed.
The Chair also reminded people to make sure their AM System information is up to date as there were a couple bounced back emails when trying to distribute information to the members.
Six new members were added to the roster and introduced to the SC.
The Chair presented the Standards Status Report for bushings, see Appendix A. It was noted that an extension was granted for PC57.19.04 and that a new PAR was granted for Distribution Bushings, PC57.19.02.
A.2 Working Group and Taskforce reports
A.2.1 C57.19.00-2004 – Keith Ellis, Chair
No Meeting was held. Mr. Ellis informed SC that the review group that was form at the last meeting had only supplied one suggested change for consideration. The Chair asked if there were any further comments or if any of the review group would like more time to complete the task. No comments were received and therefore he asked if there were any objections to setting this task as closed. No objections were made.
A.2.2 WG PC57.19.01-2000 – Dr. Shibao Zhang, Chair; David Wallach, Secretary
See complete minutes in Appendix B of this report.
A.2.3 C57.19.100-2012 – Tommy Spitzer, Chair (not present)
Prior to this meeting Mr. Anthony Natale brought forth an issue he is confronted with quite frequently. There is a contradiction between the Application Guide, C57.19.100-2012 and the General Requirements and Test Standard, C57.19.00-2004. The Guide states that bushings tested per 19.00 are only rated for 55K rise transformer and therefore bushings used in 65K rise transformer need to be derated to account for the difference. However, the Standard 19.00 states that bushings tested per the standard are rated for 65K rise transformers. This causes confusion among the OEMs and their end users. The Chair of the Guide, Mr. Spitzer, provided a statement that was shown to the SC, see Appendix C. In short, Mr. Spitzer stated that the Guide needs to be revised to correlate with the Standard and he will begin working on the next revision to the Guide next year.
Annex A
Page 2 of 18
A.2.4 WG PC57.19.04 – Scott Digby, Chair; JD Brafa, Vice Chair; Secretary, Jim Campbell
See complete minutes in Appendix D of this report.
A.2.5 IEC/IEEE 65700.19.03 – Les Rechsiedler (IEEE) and John Graham (IEC), Co-Chairs
The first dual logo standard was approved June of 2014, as such no meeting was held.
A.2.6 WG PC57.19.02 Distribution Transformer Bushings – Steven Shull, Chair; Ed Smith, Vice Chair
See complete minutes in Appendix E of this report.
A.2.7 TF Composite Bushings – John Graham, Chair; Secretary, Robert Middleton
See complete minutes in Appendix F of this report.
See complete minutes in Appendix G of this report.
A.3.2 IEEE 693 – Eric Weatherbee, IEEE Liaison
There have been no new meetings or WG correspondence in regards to IEEE 693 as the Recommended Practice is being prepared for Ballot. Mr. Weatherbee had contacted The Chair of 693, Mr. Fujisaki, for any updates to be provided to the SC. Mr. Fujisaki stated that the Ballot is still on schedule for this year and was recently received back from word processing.
A.3.3 WG PC57.160 Guide for PD Meas. in Bushings and Inst. Trans. – Thang Hochanh, Chair
See complete minutes in Appendix H of this report.
A.4 Unfinished Business
A.4.1 Partial discharge in bushings
This issue was raised at the last meeting by a Transformer OEM in regards to PD that can develop during testing at OEM factories which lead to a lengthy discussion amongst the SC. The acting Chair informed the group that upon discussion with The Chair, Mr. Zhao, it was decided that the proper steps would be to pass the issue on to the Dielectrics Test group first which was done prior to this meeting. The Chair also noted that this area of coverage (OEM testing of bushings) is lacking, and this may be a good opportunity to start forming a document. If the Dielectrics and Test group does not wish to handle the issue the Bushing SC will make a decision on how to proceed.
A.5 New Business
There was no new business
A.6 Adjournment 10:10 am
Annex A
Page 3 of 18
Annex A
Page 4 of 18
Annex A
Page 5 of 18
Annex A
Page 6 of 18
Annex A
Page 7 of 18
Annex A, Appendix C
Annex A
Page 8 of 18
Annex A
Page 9 of 18
Annex A
Page 10 of 18
Annex A
Page 11 of 18
Annex A
Page 12 of 18
Annex A
Page 13 of 18
Annex A
Page 14 of 18
Annex A
Page 15 of 18
Annex A
Page 16 of 18
Annex A
Page 17 of 18
Annex A
Page 18 of 18
Page 1 of 15
Annex B Dielectric Tests Subcommittee
March 23, 2016 Atlanta, GA.
Dielectric Tests Subcommittee
Chair: Michael Franchek Vice-Chair: Thang Hochanh Secretary: Ajith M. Varghese
Room : Capitol Ball Room Date : March 23, 2016 Time: 11:00 am to 12:15 pm
Members : 116 Present at time of checking : 77 Present per attendance roster & recorded to AM System: 83
The Chair briefly highlighted the requirement that while introducing one need to state their employer/ company and sponsor if difference from company. Chair also reminded that IEEE and transformer committee are non-commercial organizations and standards shall focus only in developing performance and functional requirement and not design and construction details.
The Chair reminded the WG on attendance requirement for new membership and for continuation and the requirement to have attendance updated in AM system. Chair welcomed 15 new member during the meeting. It was also noted that SC roster currently have close to 500 guests and guest list will be reviewed before next meeting and will remove guests from roster who have not been attending the meetings.
The Chair shared details of upcoming PES sponsored meeting as well as details of next transformer committee. PES T&D Expo will be at Dallas from 2016 May 2nd to 5th and next transformer committee will be from October 23-27, 2016 at Vancouver, Canada.
Current Status of PARs was presented.
Chair announced that he will be stepping down from Chairmanship after Atlanta meeting and current secretary, Ajith Varghese has volunteered to take over the chairmanship. Thang Hochanh will remain the vice chair and new secretary will be announced later.
B.2 Quorum, Approval of Minutes and Agenda
The membership list was shown and a show of hands of committee members present showed that a quorum of members were in attendance at the start of the meeting. 77 out of 116 members were present at time of checking, so there was a quorum.
All attendance is recorded in AM System. Per verification of roster 83 members and 142 guests attended the SC at Atlanta.
The minutes of the Fall 2015 meeting at Memphis meeting was approved unanimously. Motion for approval of meeting minutes was made by Kenneth Skinger and seconded by Daniel Sauer.
Annex B
Page 2 of 15
Chair presented agenda for the meeting. A motion to approve agenda for the meeting was made by Daniel Sauer and was seconded by Jack Harley.
B.3 Working Group Reports B.3.1 Working Group on External Dielectric Clearances
Eric Davis, Chair; Troy Tanaka, Secretary The Working Group on External Dielectric Clearances met on Monday March 21, 2016 at 9:30 AM in the Sheraton Atlanta. There were 64 people in attendance; 15 of 18 members, and 49 guests. One guest requested membership, but will not be granted membership based on requirements stated in the Policies and Procedures Manual for Working Groups. A quorum was achieved. The full attendance record is available in the AM System. David Wallace moved that the meeting agenda be approved. Dan Sauer seconded the motion. The agenda was unanimously approved. David Wallace moved that the spring 2015 meeting minutes be approved as written. Dan Sauer seconded the motion. There were no revisions or additions to the minutes. The motion passed unanimously. The discussion began with the description stated in the 6th column of the Table 10. The group agreed to clarify the column by renaming it to state “Minimum Clearance between live parts of different phases of the same voltage”. A majority of the discussion focused on the informative notes in Table 10 and the normative notes beneath it. With regards to informative notes, the WG modified Note 1 to state, “The external clearances given are for transformers intended for operation at altitudes of 1000 m (3300 ft) or less. For operation in excess of 1000 m, please refer to Paragraph 4.3.2.” Note 2 was modified to state, “The above clearances are the minimum required to ensure satisfactory operation considering only the effects of electrical stress.” In addition, Peter Balma moved to relocate the normative note “Transformers at nominal system voltage of 735kV, 765kV, and 110kV are normally single phase so that clearances between live parts of different phases is not an issue” to become informative Note 3. Dan Sauer seconded the motion and the WG unanimously agreed. With regards to Normative notes, the WG modified normative “note a” to start as “Note that…” rather than “It should be noted that...” After some discussion, the WG agreed to keep normative notes “b” and “c” as normative notes. The WG made some editorial comments to the text including modifying the description of Article 1.1 and Table 10 to read “Minimum external clearances of transformer live parts” in order to be consistent with the data in Table 10.
Annex B
Page 3 of 15
After completing discussions about modifications to the text and table, Dave Wallace made a motion to send the revised text and table to the Dielectric Test Subcommittee for approval. Dan Sauer seconded the motion. The WG voted to send the revised text and table to Subcommittee by a vote of twelve (12) to one (1). The chair agreed to make the appropriate changes before sending the document to the subcommittee. The chair thanked the WG for their efforts and asked for a motion to adjourn. Dan Sauer moved to adjourn the meeting. David Wallace seconded and the meeting was adjourned.
B.3.2 WG on Dielectric Frequency Response Analysis (DFR) Ali Naderian, WG Chair; Peter Werelius, Vice Chair, Poorvi Patel, Secretary Monday, March 21st, 2016 – (3:15 -4:30PM) The meeting was called to order by the WG Vice chair Peter Werelius at 3:15 PM. This is the sixth Working group meeting. There were a total of 71 attendees; 19 members and 51 guests and 8 requested to become members. 6 memberships were granted.
1. With 19 members attending the meeting we had a quorum (out of 32 members)
2. Agenda was approved- motion for approval from Subramanian Raman and Diego Robalino
3. The minutes of meeting from the WG Fall 2015 meeting in Memphis, TN, was approved- motion for approval from Daniel Sauer and Michael Franchek.
4. To complete a second version of the draft DFR guide 3 conference calls and one face to face meeting was held to go through all the 160 comments that were received after the first circulation.
5. The PAR is expiring on 31st of December 2017. To reach this deadline the following timeline is targeted.
a) Draft second revision of the DFR guide to be circulated to members and guests for review by April 7th.
b) Members and Guests to submit their review by the 12th of May- (6 weeks)
c) TF chairs to resolve new comments by 30th of June.
d) Ready for voting to submit to ballot by Vancouver in Fall 2016
6. Review of the chapter in the DFR guide by the task force leaders
a) Diego presented the chapter 4- DFR Measurements Overview
b) Chuck presented chapter 5 and 6. Reviewed the changes in tables 3-6 and test record section 6. Comment by Mark to add what to do if you have a core ground shield between the winding. This should be added in the next revision. We may also want to include the influence of windings not measured but in placed in between to other windings under test
c) Peter presented chapter 7- showed cases where higher voltage would be beneficial and also cases that should the influence of stop frequency. Summary and stated in the MEMO is
o DFR test voltage is typical 140 RMS. Higher voltage may be used.
o Stop Frequency range 0.01 Hz to 0.0001 Hz
Annex B
Page 4 of 15
d) George presented Annex A
e) Poorvi presented non-moisture related cases that are presented in Annex B
f) Mario had a presentation on measuring challenges
7. Comments were made if
a) DFR from winding to core ground (UST) may be included - this way the influence of bushings will be taken off
b) DFR in a non-oil filled unit should be mentioned. Doing the DFR on a dry unit (not oil filled) may give better estimation of the moisture.
8. Meeting was adjourned 4.15 pm- motion to adjourn by David Sauer and Mario Locarno.
9. Attendance was recorded in AM system after the meeting.
Ali Naderian, WG Chair- Not present at this meeting Peter Werelius, Vice WG Chair Poorvi Patel, Secretary
B.3.2 Working Group for Revision of the Distribution Impulse Test Guide C57.138 Recommended Practice for Routine Impulse Test of Distribution Transformers; Arthur Molden, Chair; Susmitha Tarlapally, Vice-Chair
Atlanta GA, March 23rd, 2016 Our working group did not meet this time. We have balloted the Draft 3 document and the ballot closed on March 11th. There were 95 balloters signed up, of which 78 responded; a 95% response rate. Of those responses there were 68 affirmatives, 3 negatives and 7 abstentions; a 95% approval rate. We received 75 comments in all and we are currently working on resolution of those comments. Art Molden WG Chair. 3/23/2016 B.3.4 Working Group on Revision of Impulse Tests
Pierre Riffon, Chair; Daniel Sauer, Vice-Chair
The WG met on March 22, 2016, from 4:45 pm to 6:00 pm. Twenty-two (22) members and fifty (51) guests attended the meeting. Five (5) guests requested membership. The meeting was chaired by Pierre Riffon, chair of the WG. Mr. Daniel Sauer was the vice-chair.
Annex B
Page 5 of 15
Attendance has been recorded in the AM system.
Required quorum was not met, presence of at least 23 members was required. The working group membership has been reviewed after the Memphis meeting and members who did not attend the last two meetings were moved as guests.
The WG chair will also clean the guest roster since several of them do not attend anymore WG meetings.
Since the quorum was not met, approval of the Memphis meeting minutes will be postponed to the upcoming meeting in Vancouver, BC, Canada.
The first item of business was related to a survey on the impulse front time test parameters and tolerances. This survey was sent on December, 29, 2015 to the WG membership. Out of 287 individuals who were asked to participate, 70 provided a reply (return rate of 24.4%). Out of these 70, 66 were approved or approved with comments (94.3% approval rate), 3 disapproved and 1 abstained. The negatives were discussed and one was rejected. The two other negatives were excellent comments and were accepted. The reference to the test voltage function described in IEEE Std. 4 will be moved in the main text under clause 10.3.1 "General". A fourth survey with the modified proposal will be sent to the WG and Dielectric test Subcommittee prior to next meeting.
The second item of business was related to a survey on the way that the chopping time during chopped-wave tests is defined and measured. This survey was sent on December, 29, 2015 to the WG membership. Out of 287 individuals who were asked to participate, 63 provided a reply (return rate of 22%). Out of these 63, 58 were approved or approved with comments (92.1% approval rate), 2 disapproved and 3 abstained. The negatives were discussed and were rejected. A second survey with the same wording as surveyed will be sent to the WG and Dielectric Tests Subcommittee membership prior to next meeting.
The third item of business was related to a survey on the instantaneous voltage level at instant of chopping. This survey was sent on December, 29, 2015 to the WG membership. Out of 287 individuals who were asked to participate, 50 provided a reply (return rate of 17.4%). Out of these 50, 37 were approved or approved with comments (74.0% approval rate), 8 disapproved and 5 abstained. The negatives together with the initial proposal and a new modified proposal were discussed. No decisions were taken because of the lack of quorum. The Chair will prepared a modified proposal that will be sent to the WG membership prior to the next meeting.
The meeting adjourned at 6:00 pm on March 22, 2012.
The next meeting is planned to be held in Vancouver, BC, Canada, on October 25, 2016.
Pierre Riffon P. Eng. WG Chair March 22, 2016 .
Annex B
Page 6 of 15
B.3.5 Working Group on Revision of Low Frequency Tests Bertrand Poulin, Chairman; Bill Griesacker, Secretary
Atlanta, GA – March 22, 2016, 1:45 p.m.
1. There were 110 attendees, 25 members and 85 guests present at the meeting; 21 guests requested membership. More than 50 % of the working group members were in attendance at the meeting, therefore a quorum was present.
2. The agenda for the meeting was presented and unanimously approved.
3. A motion was made to approve the minutes from the Fall 2016 meeting in Memphis, TN. The minutes were unanimously approved with no objections or comments voiced.
4. Bertrand Poulan resigned as Chairman of the working group and Bill Griesacker accepted the position of Chairman. Bertrand intends to follow through with the old business items that he started to provide continuity in bringing resolution to these items. The attendees of the working group were offered to volunteer for the positions of Vice-Chair and Secretary; the intent is to have these positions filled by the next meeting.
5. Old business
a. Applying pressure inside a transformer tank during induced test.
Bertrand Poulan reviewed modified text that he prepared as suggested wording to address this issue. A limit of 0.5 psi (3.5 kPa) was offered as a limit based on previous comments requesting a specific limit. It was questioned if it would be better to not allow any artificial adjustment to the pressure, i.e. test at a normal tank pressure. However, based on prior negatives asking for a specific pressure limit, one has now been added.
The recent modifications to the offered text will be surveyed.
b. Tap Changer Position During Induced Test
Bertrand Poulan modified the draft proposal based on the feedback from the survey comments. The new text has several examples for guides. It was debated if the examples should be placed in an annex or left in the text. The examples will be left in the main text based on comments from several European reviewers that were not as familiar with the North American tap changer practice.
The new modified text will be surveyed.
c. Wound core gassing issue on distribution and class 1 transformers: proposed design test.
Phil Hopkinson was not present at the meeting to give a status or present material on this topic.
6. New Business
Annex B
Page 7 of 15
a. Applied test for transformers with high voltage delta windings.
The topic was discussed, including the proposed test circuit. A motion was made to strike the comments referencing the benefit the test lends to partial discharge measurement during the applied voltage test. Note that there was no recommendation or requirement in the text to measure PD. The working group voted to reject this motion. A second motion was made to move the comment on PD during applied voltage test to a note. The working group voted to accept this motion.
b. Dielectric tests in the field. No activity. Mark Perkins will write the details of a motion to generally require field tests on transformers with new insulation to be tested in accordance with C57.12.00 test voltage levels and transformers with other than new insulation to be tested in accordance with C57.12.90 test voltage levels. Background levels for PD can be a problem in the field and will need to be addressed.
c. Induced Voltage Test - Partial Discharge Level is too high.
A request was made by Edgar Trummer to review the partial discharge acceptance level since some of his customers view the IEC 300 pC limit and the IEEE 500 pC limit as unacceptably too high. They strongly suspect that transformers with several hundred pC measured during factory test, but within the standard limit, are more susceptible to premature failures in service.
7. This working Group plans to meet next in October of 2016 at the Fall Transformer Committee meeting to be held in Vancouver, BC.
8. The meeting adjourned at 3:00 p.m.
Annex B
Page 8 of 15
B.3.6 WG - IEEE Guide for the Detection of and Location of Acoustic Emissions from Partial Discharges in Oil-Immersed Power Transformers and Reactors (C57.127) Chair: Detlev Gross Chairs Vice Chair: Jack Harley Secretary: David Larochelle Atlanta, March 21st 2016 Room: Georgia 2,3
Meeting Attendance
The working group met at 11:00 AM. 34 persons were in the room and 14 members were present. Quorum requirement was met. Complete attendance record is available in the AM System.
Discussions
The meeting started with a presentation by Arturo Nunez on the all acoustic system. He mentioned two distinctive methods of covering a power transformer for acoustics. The first method involves a 1 channel detector that is used to periodically map the acoustic activity on the transformer. This method can be used for general surveillance.
The second method uses 12, 24 or more acoustic sensors in order to localize the partial discharge source when having stronger indications of partial discharge. Arturo then presented field test results. Some cases allowed to repair the transformer on site and avoided an unplanned outage. Another case used monitoring over a long period and shown a sharp rise of acoustic activity that lead to a planned outage for inspection that revealed an issue that had to be repaired.
We then proceeded with the assistance count and quorum was obtained. We could approve the current agenda (motion by Michael Franchek, seconded by Aaron Sexton) and the minutes from Memphis (motion by Hemchandra Shertukde seconded by Michael Franchek).
Alexander Golubev made a presentation on acoustic and electrical signal characteristics in the localization process. In the list was the fact that pulse count is not available using acoustic sensors because the ringing of the signal might hide repetition of PD events.
The main topic of the presentation was on the use of coupling capacitor and the effective bandwidth available for the measuring device. A simple R-C circuit cannot be used to calculate the bandwidth provided by the sensors. Parasitic effects will affect the impedance at different frequencies and will make the real bandwidth difficult to predict. The choice of the bandwidth is a compromise between the noise (decreases at higher frequencies) and the coverage of the sensor (low frequencies will be less attenuated over the distance).
After the presentations, we discussed the chapter 5 of the current revision. A comment was made regarding a statement saying that the all-acoustic system does not need voltage or current measurements.
Annex B
Page 9 of 15
While it is true for acquiring acoustic signal, voltage correlation can be of great value for establishing a diagnostic. It was agreed in the group to clarify this sentence and to detail the relation between voltage, current and partial discharge in section 7.4 of the current revision of the guide.
The group will meet again in Vancouver for the fall 2016 meeting.
Adjournment
The meeting was adjourned at 12:15 PM.
David Larochelle
B 3.7 Working Group for PD in bushings, PTs and CTs – PC57.160 WG Secretary: Thomas Sizemore; WG Chair: Thang Hochanh March 21, 2015 at 4:45 – Atlanta, GA Attendees: 50
Members attending: 15/28
Agenda: An agenda was presented for the meeting.
Minutes: Motion approved David Wallace (1st) & Vladimir Khalin (2nd)
1. Items discussed based upon comments received:
• 6.4 Discussed moving the key from this section to earlier in this document. Decided to move it appropriately after reorganization of the document. Likely just before balloting.
• Comment (Shibao Zhang) regarding addition of figure number to resolve comments in 6.4 and 6.5.1 figure 4.a and 4.b. Explanation was provided to clarify text and drawings. Updated version of the draft contained resolution.
• 6.5. 1st paragraph - Clarification on comment regarding calibration. No change was required to resolve the question.
• 7.1 “Casing connection”. New text was accepted to clarify the connection to the primary and ground.
• 7.1 b2 – Comment (Pierre Riffon) regarding the second test object was discussed and proposed text accepted.
Figure 5a and 5b – New test circuit to be provided by Vladimir.
• Incorrect connection fig. 5a and fig. 5b (Pierre Riffon), due to copy and paste action, will be corrected.
• Incorrect connection fig. 7a and fig. 9 (Pierre Riffon), due to copy and paste action, has been updated in draft 5.4 .
Annex B
Page 10 of 15
2. Presentation by Detlev Gross:
Detlev presented several PD patterns and the physical explanation for the partials discharges. Several questions were answered as this presentation was made. The first portion of his presentation was made speaking very generically. The second portion of his presentation was providing a number of specific examples. Numerous comments were made from Thang and Bertrand.
Detlev has agreed to make his presentation available to the attendees and the patterns may be used as part of the guide.
3. Additional discussion after the presentation:
Mario Lucano asked about the value of C2 in section 6.3.1. A short discussion was initiated. The chair will propose a new text to the group at the next meeting.
Fall meeting 2016: This WG plans to continue working at the Vancouver meeting.
Next version of draft: A new draft is being prepared to incorporate all of the recent comments and also to modify the format to match the IEEE style guide.
Date: 2016-03-22
Secretary: Thomas Sizemore
Chairman: Thang Hochanh
B 3.8 Task Force Winding Insulation Power Factor & Winding Insulation Resistance Limits WG Secretary: Diego Robalino; WG Chair: Susmitha Tarlapally March 22nd at 8:00 am – Atlanta, GA Meeting called to order at 8am on Tuesday, March 22nd, 2016 Susmitha Tarlapally (ABB) chair (absent) Diego Robalino (Megger) Secretary – chairing the session Kris Neild and Mario Locarno – acting secretaries Introductions of audience Attendance:
• Total attendees: 62 o From previous meeting 42 attendees
4 requests to become members: Membership granted • Yang, Baitun • Yeboah, Kwasi • DeRouen, Craig • Prince, Jarod
o New attendees 20
Annex B
Page 11 of 15
3 requests to become members: names recorded and will be added after two consecutive meetings attendance
• 26 members out of 44 attended this meeting; quorum has been established • Reviewed agenda, approved motion by Ajith Varghese, second by Subhas Sarkar, passed by vote. • Reviewed minutes from fall 2015 – First TF meeting in Memphis.
o Charles Sweetser gave a description of the proposed database used in C57.104 o Discussion by Baitun Yang (Pennsylvania transformer), and Diego Robalino about when
testing should be done. Just on bushing or on fully assembled transformers. o Minutes from fall 2015 were approved, motion by Subhas Sarkar, second by Mark
Perkins, motion passed.
• Michael Franchek, Dielectrics SC chair talked about the CDA process efforts that should provide
a secure framework for collecting and sharing sensitive data. Confidentiality is a priority.
• Reviewed TF scope
o Scope was modified based on comments from the participants. Diego updated the scope in his presentation. Update to include factory test (acceptance) and field commissioning.
o Title was discussed to determine if it was appropriate for the testing limits being proposed. No changes were made to the title.
o Approved scope, motion by Mark Perkins, second by Ajith Varghese, motion passed by majority vote.
o Updated scope to go to SC meeting for final approval.
o Reviewed table 100.3 from NETA2013 o Reviewed table 100.5 from NETA2013 o More discussion about what is to be measured, just windings or both winding and bushing.
Field commissioning would include the bushing by default. Do we measure CH, CL, CHL? o Question (from Mark Perkins ABB) as to what power factor measurements will be collected,
overall or just individual components at this time such CH, CHL, CL? o Suggestion from Charles Sweetser that perhaps different types of data could be collected,
such as with or without bushings. o Consensus was to see what the data presents should this group go forward.
Annex B
Page 12 of 15
• Proposal – TF Purpose • This was reviewed and the same changes that were made to the scope were also made to the
purpose. Reactors were added to the purpose. • Diego updated the purpose in his presentation. • Approved the changes to the purpose – motion by Mark Perkins, second by Subhas Sarkar,
approved by majority vote.
• Lively debate over the intended use of the term limits, decided that it was premature to discuss
before the task force accomplishes its goal. • Data collection chart to be sent out for comments. • Made changes to the scope based on the changes that were made to the purpose. These changes
included adding reactors and adding power and distribution transformers. • Re-approve the scope - Motion by Mark Perkins, second by Kirk Robbins, passed by majority
vote. • Discussion on what data is to be collected in the database. Template was reviewed and will be
sent to all members. • Presentation from Member Mr. Subhas Sarkar regarding PF/IR was shown. Material deemed info
only, and the meeting came to end without enough time to discuss the presentation.
Review of volunteers. Lorne Gara added his name to the list of volunteers Motion to adjourn by M. Locarno, second by P. Patel, approved by majority vote Meeting adjourned at 9:19 am. NEW SCOPE APPROVED BY SC DIELECTRICS @11:32 WEDNESDAY 23TH, 2016
Annex B
Page 13 of 15
B.4 Liaison Reports
B.4.1 Voltage Test Techniques (HVTT), IEEE Standard 4 - Arthur Molden
The Working Group of High Voltage Test Techniques (HVTT) Subcommittee met in conjunction with the IEEE PES, Joint Technical Committee Meeting at Memphis, TN on January 13th, 2016. There were 5 members and 2 guests present.
New and exciting projects discussed were:
Revision of IEEE 1122 Standard for Digital Recorders for Measurements in High-Voltage Impulse Tests. The PAR for this project has been approved
Revision of the 1983 edition of IEEE 510, IEEE Recommended Practices for Safety in High-Voltage and High-Power Testing. In preliminary stages of discussion. Par not yet applied for.
Application guide (tutorials) for IEEE Standard 4.
i. Practical examples on impulse waveform evaluation
ii. Practical examples on uncertainty analysis
iii. Practical examples for creating / maintaining a Record of Performance
This work will necessitate formation of Task Force teams to focus on the various aspects of the revision and tutorial work.
Standard 4 Advisory Group. It was moved and approved at the last meeting of Dielectric tests, that a Standard 4 Advisory Group be formed and hold regular meetings during the Transformers Committee Meetings. The meetings would be used to make tutorial presentations on such subjects as are listed in the aforementioned Application guides.
The Standard 4 Working Group are actively soliciting members. Should anyone be interested in joining the Working Group or Task Force members, please contact Jim McBride or myself for details.
The next HVTT WG meeting will be at the Fall Switchgear Meeting at Pittsburg PA, October 9th to 14th, 2016.
END
A. Molden 3/23/2016
Annex B
Page 14 of 15
B.5 Discussions
• WG on external clearance reported that their work is ready to survey. Modified section will include phase to ground clearance in-addition to phase to phase clearance. A motion to survey modified text and table in subcommittee was moved by Eric and seconded by Phil Hopkinson. Motion was passed unanimously.
• As a follow up of motion passed in Task force meeting on Insulation Power factor and insulation resistances, scope of Task force presented the defined scope to sub-committee. Motion was moved by Diego Robalino and was seconded by Peter Werelius. The motion was approved unanimously. The approved scope of Task Force will be.
Review and determine if factory acceptance and/or field commissioning limits can be established for winding insulation power factor and insulation resistance for power and distribution transformers and reactors that includes both mineral oil and alternate liquids
B.6 Old Business
Chair presented the results of survey on revised text of subcommittee scope for transformer committee O& P manual which was surveyed.
Chair presented the revised text which incorporated editorial comments from survey. Below is the revised text as presented.
The Dielectric Tests Subcommittee shall be responsible for the following:
a. Studying, reviewing and establishing the test requirements necessary to determine that dielectric withstand capabilities are met for liquid immersed transformers and reactors, under normal and transient conditions.
b. Developing and maintaining related standards, recommended practices, and guides for such criteria
c. Coordinating with other technical committees, groups, societies, and associations as required
Annex B
Page 15 of 15
Motion to approve revised text as presented was moved by Bertrand Paulin and seconded by Kenneth Stinger.
Joe Watson commented to include the wording “service requirement”. Jeff Britton wanted to know if dry type transformer was included which was clarified as out of scope.
Motion was passed as presented with all supporting except 1 voting against.
B.7 New Business Phil Hopkinson brought a new item for discussion regarding effect of High frequency transient from breaker operation on transformer. Per Phil, Circuit Breaker size/capacity has increased over the year and effect of transients under these conditions are not fully understood and wanted to re-introduce Steep Wave (Front- of – Wave) testing during final acceptance test as way to mitigate transformer failures due to these transients. Discussion the followed questioned Front of wave as effective test to transient seen under these condition. Detlev noted that waveform under circuit breaker operation is different and have high frequency transients which is different from Front of wave. Dave Geibel pointed out that issues should be addressed to prevent fast transients from reaching the transformer than protecting the transformer under these condition. Bertrand Paulin noted that there is already a task force led by Jim McBride dealing with switching transient and suggested to expand the scope of TF to include this topic. Jim Graham clarified that, it is okay for DTSC to request Performance Characteristics SC to expand the scope of TF to include this topic. After discussions a motion was passed to request Performance characteristic subcommittee to expand the scope of “ TF of Switching transients induced by transformer-Breaker interaction PC57.142 chaired by Jim McBride” to expand the scope to include “ Investigate effect of high frequency transient on transformer and identify mitigation which may including additional factory testing or prevent transients from reaching unit “ . Motion was moved by Phil Hopkinson and seconded by Craig Stiegemeier. Motion was approved unanimously.
B.8 Adjournment
Meeting adjourned 12.05 PM.
Minutes respectfully submitted by: Ajith M. Varghese Secretary DTSC.
Page 1 of 11
Annex C Distribution Subcommittee – Chair: Stephen Shull
March 4, 2015 Atlanta, GA
Chair: Stephen Shull Vice-Chair: Jerry Murphy
C.1 General Opening
Steve opened the meeting welcoming everyone to the meeting. Jerry circulated the rosters. To establish a quorum, a list of members were displayed and a count of was made. We did have a quorum with 35 of the 42 members in attendance by count of those identified on a slide presented in the meeting. Recorded attendance gave 135 in attendance, 36 members and 23 requesting membership.
The agenda was reviewed and motion made by Dan Sauer, seconded by Ron Stahara and approved by unanimous acclamation of the members in attendance.
The Spring 2015 meeting minutes were reviewed and motion made by Dan Sauer, seconded by Sanjib Som and approved by unanimous acclamation of the members in attendance.
Craig presented the following minutes from the working group meeting on March 21, 2016 at 4:45 p.m. with 48 people in attendance. 1. Meeting was called to order at 4:45 pm, 21 March 2016. 2. Check for Quorum made first: 35 Members listed on the roster, meaning 18 needed for
quorum. There were 27 Members were available for the meeting. 3. Agenda of this meeting was accepted and passed. Dan Sauer made the Motion and
Second by Steve Shull. Motion carried. 4. Minutes of the last meetings the two day work session and the scheduled summary at the
Fall IEEE Transformer Meeting in Memphis were accepted and approved. Dan Sauer made the motion and Martin Rave seconded. Motion carried.
5. The Chairman advised the group on the reasons behind having drafts 1.2 through 1.5 dating back to the work session in Memphis, relating to the interactions between creating duplicate drafts using different formats from the IEEE and IEC processes.
6. Draft 1.5 was submitted as a CD to the IEC community for a 3 – month review. Comments will be made available after April 8th.
7. A balanced IEEE ballot pool was established and a MEC review completed on Draft 1.5. 8. Due to the number of technical comments received in March from the Working Group it
was decided to delay submitting draft 1.5 to the IEEE ballot pool. 9. Some of the technical comments were discussed with decisions. The following is a
synopsis of those discussions: Clause 10.3.2. discussion on the interface connector using the MIL 5015 shell and pin design included a proposed change reducing the size and number of pins from 20 to 19. Suggestion was noted and accepted by the WG.
Annex C
Page 2 of 11
Clause 10.3.2. Figure 24 – during the discussion it was noted the drawing can be made more clear on the location of the universal interface which is only provided when specified by Purchaser. Location of the interface is at the bottom of a junction box located on the cover or at the bottom of an auxiliary box located between the cover and the control enclosure. The Working group agreed with this response. Clause 8.6.5 and 8.6.6 – The WG Agreed with that the recommendation for the induced voltage test to be performed at the 15 Raise position. For the High Pot, Megger, and Power Factor Tests, the Working Group agreed specifying a specific tap for the test to be performed was not required. A Note will be added to clarify this so users are made aware. Clause 5.3 – the WG agreed to leave the maximum value of Add Amp at 668 Amps. Note to be added: in the add amp ( ) section will allow but has to be worked out between the manufacturer and the users. Working group agreed to place at the end of Annex E a Figure indicating stages of life regarding the moveable and stationary contacts. Clause 5.4, Page 19 Line 18 – the WG agreed to leave the paragraph as is stating the minimum amount of regulation in the extreme Raise position is 10%. Clause 10.5.1.7.3 Page 117 Line 2 & 3 – WG agreed to resolve minimum value of bandwith and time delay range discrepancy between 10.5.1.7.3 and 10.2.1. WG agreed to change Bandwidth range in 10.2.1 to 1 – 6 and changing Time Delay range in 10.2.1 to 5 – 120. The WG agreed to add a note indicating if a minimum value of 5 sec is not available, the minimum value of a specific control is acceptable. Clause 3 Page 7 Line 4 – the comment was to delete definition “reactor”. And add a definition for “bridging reactor” Reject proposal: Reactor does not have to be in a bridging position to be preventive when equalizer windings are used. The term reactor and Preventive autotransformer are referred to together in the load tap changer standards, C57.131 and 60214-1 and preference is to be consistent with them. The WG agrees with the comment rejection. Clause 5.2 Table 4 – The comment suggested that for 33kV rated to meet a maximum system voltage of 36kV, BIL should be 200kV see Table 3 for example. The discussion noted that From IEC 60076-3: Highest Voltage for equipment winding Um 36 kV, The Full Wave Lightning Impulse 170 kV 200a - - a These values are not given in IEC 60071-1:2011 for the particular value of Um but are included either because they represent common practice in some parts of the world or for some switching impulse levels, because they represent a coordinated value for a particular value of lightning impulse level. The WG Agreed to leave BIL as is t=for 33 kV 50 Hz ratings Table 2 footnote a - the comment was to remove the “experience and general acceptance, or an accepted test”. The WG agreed that the sentence be changed to: “Apparatus with specified temperature rise shall have an insulation system proven to possess minimum aging characteristics, by an accepted test.” Clause 6.2.2 – the comment was to change the term “Sudden Pressure Relay” to something else. The WG agrees with verbiage as currently written.
Annex C
Page 3 of 11
Clause 6.2.1 – The comment noted the sudden pressure relay pressure change was incorrectly stated and this will be corrected to 0.5 psi/s to 3.0psi/s. this was incorrectly stated in draft 1.5. WG Agrees to correction. Clause 8.8.3.2 – Comment was made to limit the maximum value of symmetrical current as the value of symmetrical current is raised to reach the required asymmetrical peak to offset difficulty in obtaining the asymmetrical peak due to the X/R ratio of the tested voltage regulator. The WG disagreed: As long as the asymmetrical requirement is not exceeded, the value of the symmetrical current is moot. WG agrees leave it as is. 10. Draft 2.0 will be created to include resolved technical and editorial comments from the
WG. Resolved IEC CD comments will be included in this draft. 11. Next IEEE Transformer Committee WG meeting— Oct 23-27, 2016 in Vancouver BC.
Meeting schedule to include a full day pre-session and the normal Monday afternoon session.
12 Comments not fully discussed will be addressed with WG by way of emails and Web conferences.
13. IEEE Ballot process will be delayed until an acceptable draft is completed. This Draft 2.0 will be used to create a new CD to be reviewed by IEC community. A total of 6-months is allowed from completion of ballot pool creation and ballot submission.
12. Said Hachichi moved for adjournment - second by Fred Friend – motion was unanimous. Submitted by: Gael R Kennedy/Craig A Colopy Date: 03/21/2016
C.2.2 C57.12.20 – Overhead Distribution Transformers – Al Traut
Al presented the following minutes from the working group meeting on March 21, 2016 at 11:00 a.m. with 68 in attendance.
Quorum established with 26 of 33 members present.
Motion to approve agenda as submitted (Ron Stahara made /Said Hachichi seconded) and it was unanimously approved.
Motion to approve F15 Memphis meeting minutes (Ron Stahara made /Marty Rave seconded) and it was unanimously approved.
Al reminded that the ballot of the standard closes on 4/8/2016 and currently has 50% response rate. Al reminded that a 75% response rated is needed to be considered for approval.
The Working Group proceeded to review ballot comments received to date.
The first was the footnote “a” on Table 12. Since this was just informative a suggestion by Steve Shull was to make “footnote a” to just “note” to be included in the table which would indeed be informative. As well, for consistency of the table, Rhett Chrysler suggested to the removal the “%” symbol from the column entries but leave it in the column heading.
The second was on Clause 7.5.3. It was suggested by Al Traut to reject this comment regarding C57.12.31 as it is ambiguous. D. Mulkey suggested re-wording clause 7.5.3 to make it clearer as to the meaning as it applied in this standard. Dan suggested the following change.
7.5.3 Tank and finish
Annex C
Page 4 of 11
Tank and finish shall conform to C57.12.31. Unless otherwise specified, the tank finish shall conform to Light Gray Number 70, Munsell Notation 5BG 7.0/0.4.
Motion was made by Steve Shull and seconded by Ron Stahara to accept the re-wording of this clause. This motion passed unanimously.
The third concerned the labeling of delta connected transformers shown in Table 4. The comment stated that the note on delta connected units was not clear as to which ratings are delta connected. Rhett Chrysler mentions that other standards use the delta symbol. Steve Shull recommended using the delta symbol where appropriate. A motion was made by Rhet Chrysler and Saidi Hachichi to drop the note in Table 4 and insert the delta symbol on the applicable ratings. Motion carried unanimously.
The third concerned Article 4.1. R. Marek submitted a negative ballot because he request the change of Article 4.1 and include as a normative reference C57.154. The current wording was as follows:
4. Ratings 4.1 Kilovolt-ampere ratings Kilovolt-ampere ratings are continuous and are based on not exceeding either a 65°C average winding temperature rise or an 80°C hottest-spot temperature rise. The temperature rise of the insulating liquid shall not exceed 65°C when measured near the top of the tank. Kilovolt-ampere ratings for single-phase and three-phase transformers shall be as shown in Table1. These ratings are based on the usual temperature and altitude service conditions specified in IEEE Std C57.12.00.
And the proposed wording change and addition to the normative references as follows:
4. Ratings 4.1 Kilovolt-ampere ratings Kilovolt-ampere ratings are continuous for an insulation system thermal class of 120 as defined in IEEE Std C57.154 and are based on not exceeding either a 65°C average winding temperature rise or an 80°C hottest-spot temperature rise. The temperature rise of the insulating liquid shall not exceed 65°C when measured near the top of the tank. Kilovolt-ampere ratings for single-phase and three-phase transformers shall be as shown in Table1. These ratings are based on the usual temperature and altitude service conditions specified in IEEE Std C57.12.00.
With the addition the Normative references: IEEE Std C57.154, IEEE Standard for the Design, Testing, and Application of Liquid-Immersed Distribution, Power, and Regulating Transformers Using High-Temperature Insulation Systems and Operating at Elevated Temperature
Alan Wilkes mentions that the conductor materials (magnet wire) are rated at 105°C. The 120 class is for a 110°C hot spot. Carlos mentions that the 120 class is not mentioned in C57.12.80. Steve Shull motioned to reject the comment until all the references align on the insulation level as stated in C57.154. Ron Stahara seconded this motion and it passed with one rejection.
Rhett Chrysler comments that Article 7.2.6 would be more appropriate in 7.5.3. Dan Mulkey stated that those clauses are discussing two different types of integrity. No motion was made and based on the discussion Al Traut stated the article would be left as written.
Josh Verdin suggests a note referencing the main breaker size used in the calculation in the Table 12 so that it would be more clear in understanding the method that was used to determine the minimum percent impedance. His concern stemmed from end-user safety concerns. After some discussion by the group, no real conclusion was reached. Al Traut stated that this would
Annex C
Page 5 of 11
be left as it is currently shown because of the complexity of the issue and the time crunch we are currently under to publish this standard. He suggested that this might be considered in the next revision.
Next meeting will be held October 23-27 in Vancouver, British Columbia, Canada.
The meeting was adjourned at 12:00pm, Kendrick Hamilton recording.
Dan Mulkey presented the following minutes from the working group meeting on March 22, 2016 at 8:00 a.m. in with 47 in attendance. Introductions were made and a call for quorum showed 25 of the 38 WG members were in attendance giving quorum. Note that the full attendance list is recorded and available in the Association Management System.
The Fall 2015 meeting minutes were reviewed by the WG and with no further discussion the minutes of the was unanimously approved.
C57.12.32 IEEE Standard for Submersible Equipment – Enclosure Integrity is active, last published in 2003, and reaffirmed in 2008, and due for revision by 2018.
Reports from the assignments given at the Fall 2015 meeting were presented.
1. Carlos Gaytan looked for IEC and other standards for testing of submersible transformers. Carlos reported the RODE documents referred to other standards and he found two covering the subject.
a. NEMA 205-2003 b. IEC 60529
Carlos’ presentation will be posted to the website.
2. Jeremy Van Horn gave a presentation on the proposed definition of “submersible” for this standard. Already defined in C57.12.80, but not defined by RODE and there are no normative definitions like IEC 60529. Jeremy provided a listing of the standards relating to submersible with definitions including standards relating to service conditions and design tests.
Discussion followed concerning design leak tests with a motion by Giuseppe Termini, seconded by Said Hachichi to set submersion of 3 meters (9’-10”) to the top of the tank with a footnote that connections are only tested at 6’. Motion carried by unanimous acclamation.
Further discussion followed to set criteria for design leak testing with a motion to include the following:
a. Talc or chalk dust to be applied to provide ready identification of leaks b. Minimum of 24 hours submersed c. Tank pressurized to 10 psig d. Then reverse the components and test again.
Question was asked if the production test didn’t already provide this evidence. There was a preference to test the fully assembled unit. Giuseppe Termini seconded the motion and a call of the question passed the motion with 15 in favor, 3 opposed and 4 abstaining.
3. Rebecca Giang with Sherwin-Williams presented information regarding the FS-40 bulb used for ultraviolet testing per ASTM D4587-01.
Annex C
Page 6 of 11
a. Rebecca’s report will be posted on the website.
Next meeting will be held October 23-27 in Vancouver, British Columbia, Canada.
Time was expiring and Dan adjourned the meeting at 9:15am, Jerry Murphy recording.
C57.12.34 – Three Phase Padmount Transformers – Ron Stahara
Ron Stahara presented the following minutes from the working group meeting on March 21, 2016 at 3:15 p.m. with 75 in attendance.
Ron Stahara called the meeting to order and introductions were made. The rosters were circulated. The complete detail of attendance is recorded in the AM system. To establish a quorum, a members list was displayed on the screen and those who saw their names were asked to hold up their hand. From this count of hands, it was determined that a quorum was established. A motion was made by Ali Ghafourian and seconded by Alan Wilks to accept the agenda as shown. The motion was passed unanimously. The minutes of the Fall 2015 meeting were accepted as written by acclamation.
A quick review was conducted of the questions that were raised after the ballot or had been suggested in the balloting process. These were discussed as follows:
1 All standard references will be updated in the new document.
2 There were some concerns on the drawings on whether the low voltage bushing dimensions were carried forward from the earlier documents. Steve Shull showed that these were actually contained in the document and in particular on the specific dimensions drawings. Gary King asked that we verify that these were carried forward on the minimum dimension drawings as well.
3 There was a concern about accessing items on the transformer such as sight gauges, sampling valves, etc. in a compartment where an arc fault hazard exists. It was also mentioned that there were some instances where non-qualified individuals were asked to check a function or obtain an oil sample. Because of this a different compartment or area was requested to house these items. To reaffirm this thought, Adam Bromley stated that his company had considered requiring that the primary compartment contain these items because the fault current in his company’s system was lower in this area than on the secondary side. There was some thought on the placement of a guide on the Arc Fault issue in an annex but it was abandoned due the complexity as well it pointed out that this subject was covered in NFPA 70E. Mike Thibault commented that this was really an operational issue and didn’t really belong in this standard. The conclusion was that we should address the concern about accessing items such as sight gauges, sampling valves, etc. in a compartment or protected access area.
4 Dwight Parkinson asked that we review Figure 9 since there was a grayed out area for bushing height. Since the revision of IEEE 386 he felt that these could be filled out. Carlos Gaytan agreed in that he felt we needed to address any additions in the recently published IEEE 386. He also would like us to careful review the figures in this standard which could include a 200kV BIL dead-front interface and any new figures that had been added to clarify 600A and 900A interfaces statements in our standard.
5 Ron Stahara asked that this group address balanced lifting using the lifting lugs on the transformer. Jerry Murphy agreed since he is required to provide a lifting plan
Annex C
Page 7 of 11
when moving these units and this would help in its preparation. Alex Macias agreed with Jerry on this point.
After this discussed, the working group agreed that we need to proceed forward with a new PAR to address these issues. A motion was made to do this by Jerry Murphy and seconded by Marty Rave. The motion was passed unanimously. Steve Shull committed to getting this accomplished by the next meeting.
Next meeting will be held October 23-27 in Vancouver, British Columbia, Canada.
With this, the meeting was adjourned, Stephen Shull recording.
C.2.4 C57.12.36 – Distribution Substation Transformers – Jerry Murphy
Jerry reported the working group met Tuesday, March 22, 2016 at 1:45pm with 38 people in attendance.
Jerry Murphy called the meeting to order at 1:45 PM. Introductions were made. The names of the members were projected on the screen. By a show of hands the quorum was reached by having 14 out of the 17 members present. Gael Kennedy made a motion approve the minutes of the last meeting in Memphis; Steve Shull seconded, and the motion was approved.
Jerry mentioned that there were 3 comments that were pending to be resolved from the ballot of draft 4, and proceeded to review them. The first comment resolved was related with section 5.10.4, Tank base. Comment was about use or terms pad or foundation. After some discussion Gary Hoffman moved to reject the comment, since the proposed change was not of substantive nature. Steve Shull seconded and the motion was approved. Next comment was related to section 3.2, Liquid definition. Several definitions were reviewed such as liquid-immersed, insulating liquid and others. The group considered that the proposed change did not add significant additional information to the current definition. Gary Hoffman moved to reject the comment, Steve Shull seconded and the motion was approved.
The last comment was related with section 5.1.7, Pressure relief. After a long discussion, a motion was made by Wally Binder, seconded by Steve Shull, to eliminate the text below the line of venting and sealing characteristics, and substitute with making reference to PC57.12.39. Gary Hoffman made a friendly amendment to modify the text to include a proper reference. Wally and Steve accepted the amendment. Gael Kennedy made a 2nd friendly amendment to eliminate the first part of the text below the first line of 5.1.7. Wally and Steve accepted the 2nd amendment. Steve Shull called for the question, and the motion was approved.
Next meeting will be held October 23-27 in Vancouver, British Columbia, Canada.
Jerry informed that with all the comments resolved, he would next go for a recirculation ballot.
The meeting adjourned at 2:50 pm., Carlos Gaytan recording.
C.2.5 C57.12.37 – Test Data Reporting – Tom Callsen
This working group did not meet as planned.
C.2.6 C57.12.38 – Single Phase Padmount Transformers – Alan Wilks
Mike Faulkenberry presented the following minutes from the working group meeting on March 21, 2016 at 1:45 p.m. with 52 in attendance. The meeting was called to order by Ali Ghafourian at 1:45 p.m.
Annex C
Page 8 of 11
Twenty-four of thirty-one working group members were present which met the requirements for having a quorum.
The working group members were asked if there were any changes or corrections to the minutes from the Fall of 2015 meeting, and none were offered. Ron Stahara motioned for the minutes to be approved, and it was seconded by Justin Pezzin. The vote was unanimous in favor of the motion.
The status of the PAR was discussed. A ballot pool is currently being formed for vote on Corrigenda 1 which corrects an error in Figure 1. Until that corrigenda has been approved for publication, a request for a new PAR will not be submitted. But we still can and will be working on the document until then.
Comments from the ballot that were not included in the currently published document were presented for consideration in the next revision. The first topic was for a definition of “small interface.” Mike Faulkenberry is on the working group for the next revision of IEEE 386 and stated that the “small interface” and “large interface” terminology is not in the upcoming revision. Instead, the interfaces are given numbers. Once 386 is published, we will reference the appropriate interface numbers.
The other ballot comment that will be included is the change from “oil” to “liquid” throughout the document. There was no further discussion on that addition.
Ali then presented items from the previous meeting mentioned as possible items to be addressed in the next revision:
• Definition of “Permanent Deformation” – A good bit of discussion about this took place. Ali mentioned that you cannot get zero deformation and asked, so what is acceptable? Do we not want to say something more than “no permanent deformation?” Ron Stahara suggested that if it passes, even with permanent deformation, but has no safety issues or leaking, is that a problem? After some discussion, Ali stated that we do not have to change it but instructed the working group members to think about it for further discussions.
• Dual Voltage Ratings – These were in the standard previously, and Ali asked if the working group wanted to add them back to the standard. After some discussion, no one knows for sure why it was removed from the standard. It was suggested that it may have been because of the difficulty in knowing for which voltage to fuse it for shipping. Ali suggested that we write something for inclusion in the next draft that we will discuss. It was also suggested that this might best be put in an informative annex.
• Add Minimum Impedances – Ali stated that we would wait for Al Traut to finish this addition in C57.12.20, and then we could use those minimum impedances in our document. No further discussion took place.
• Clarifying Note 2 on the figures to define the distance between the front plate and the closest sill projection – Ali asked for members to provide comments for further discussion as to why that is there.
• Add Commonly Used Components – This includes bayonet fuses, oil gauges, arresters, etc. It was mentioned that we have previously said we do not want to include such items in the document. There was a lot of discussion on the oil gauge for determining there was enough oil to operate bayonet fuses or switches and where exactly that should be located. Do we need to specify that? Steve Shull suggested that if we wanted to address the components, it may best be done in an informative annex. Further discussion will be held on this topic.
Annex C
Page 9 of 11
• Increasing Tilt Angle for HV Bushings in Type 2 Configurations for Ease of Operation – After discussion, it was determined that there were too many variables to correctly select the proper angle. No changes are suggested at this time.
• LV Bushing Cantilever Strength – Steve Shull says this will be covered by new C57.19.02 and invited participation in the upcoming meeting for this working group.
Next meeting will be held October 23-27 in Vancouver, British Columbia, Canada.
A motion to adjourn was made by Ron Stahara and seconded by Kent Miller.
Submitted by Mike Faulkenberry.
C.2.7 C57.12.39 – Tank Pressure Coordination – Carlos Gaytan
Carlos reported the working group met Tuesday afternoon at 4:45 p.m. with 43 in attendance. The meeting was called to order at 4:45 PM. Introductions were made; the names of the members were projected on the screen. By a show of hands the quorum was reached by having 19 of the 32 members present. By the end of the meeting the member count was 22. The agenda was presented. A motion for approval was made by Alan Wilks, seconded by Ron Stahara. The motion was approved. A motion to approve the minutes of the fall 2015 meeting was made by Stahara, seconded by Steve Shull. The motion was approved.
On the chair report, Carlos informed that the PAR would expire in Dec. 2016, and the plan to request a 1 year extension at the June 2016 Standards Board Meeting.
On old business, a review of comments from MEC was presented. A few changes resulted, based on style manual, adding of abstract and keywords; changes in use of words such as “Minimize” to “Reduce”, “should, shall, may, must”¸ use of absolute language: damage, safe, shock; all per MEC recommendations. Flow chart on Annex A was updated correcting references to document. There were no comments from the working group. Steve Shull indicated that a vote is not required for these edits.
Then the ballot status was reviewed. The Invitation started 07-Mar-2016; will close on 06-Apr-2016. Carlos mentioned that the Ballot Comment Resolution Committee that was formed in the fall 2015 meeting would be engaged as soon as the comments from the ballot were completed by June. This was with the intent of completing the comment resolution process prior to the Vancouver meeting, where the results would be presented.
The next WG meeting will be in Vancouver, BC, Canada, in October 23-27.
Ron Stahara made a motion to adjourn; Said Hachichi seconded. The meeting adjourned at 5:10 pm, Justin Pezzin recording.
Carlos concluded his report saying he would be requesting a one year PAR extension.
C.3 Old Business
• None
Annex C
Page 10 of 11
C.4 New Business
• Steve Shull informed the subcommittee an update on DOE activity.
1. DOE Transformer "minimum efficiency standards" (MES) are up for the "5-year" visit.
2. Hearings to review the residential and smaller transformer data are planned.
3. It is be supportive or at variance with data from some that indicated 39% was the "average loading" over 1 year which is lower than the current standard.
4. DOE indicates that hearings are planned to be completed by "2019, to be effective January 1, 2022".
5. Also, there are efforts to expand Distribution Transformer MES from current 2,500 kVA to 10,000 kVA sizes.
6. It would be extremely helpful to have loading data on some higher kVA's, as several sources indicate they tend to be more highly loaded.
Currently we have an inactive task force that is focused on DOE Rule Making which is targeted toward Distribution Transformers. We are reactivating this task force. Phillip Hopkinson is the Chair of this group and Ned Brush is now named as Vice Chair. Since this has been inactive for a while, we will open up the task force membership.
Objective: Determine RMS-Equivalent loading and patterns of loading for Distribution Transformers Purposes:
a. Optimization of Energy efficiency considerations b. Improved thermal life considerations and realistic life extrapolation
Variables for consideration:
a. Power ratings from 10 kVA single phase to 10 MVA 3 phase b. Voltage classes c. Customer applications including general purpose, residential, industrial,
commercial, & renewable power d. Geographical locations
Interested Parties: Manufacturers, users, DOE, and consultants and other dependent standards Mechanics:
a. Establish compatible EXCEL file format for data reporting b. Establish test years for proper data comparison c. Using load profile data to develop the data d. Use the neutral clearing house of EEI for collection of the data
Milestones: a. The task force will be organized at this meeting by the signup sheets which are
located at the front. b. The Task Force will establish the final data format by Task Force meeting via
Web/Conference call.
Annex C
Page 11 of 11
c. Data collection by Fall ,2016 d. First report by Spring, 2017 e. First pass at documentation by Fall, 2017
The following example data set was presented.
• Phil Hopkinson presented a need to reinstitute the steep front wave test on as vacuum breakers are increasing in interrupting rating that he believes is causing increased failures due to the interaction of transformers and vacuum breakers. Phil asked the members to consider specifying a shield to increase the transformer capacitance to mitigate these failures.
C.5 Chairman’s Closing Remarks and Announcements
Steve had no closing comments to the SC except to see them in Vancouver in the fall.
C.6 Adjournment
Steve adjourned the meeting as provided in the meeting agenda at 10:28am.
Page 1 of 13
Annex D Dry Type Transformers Subcommittee
March 23, 2016 Atlanta Georgia
Chair: Charles Johnson Secretary: Casey Ballard
D.1 Introductions and Approval of Agenda and Minutes The Subcommittee met on March 23, 2016 at 1:32 PM in the Atlanta 4,5 Room of the Sheraton Atlanta Hotel. There were 18 of 26 members present (therefore we had a quorum of 69%), and 18 guests present, 6 guests requested membership. The attendance roster will be kept in the AMS. The agenda was approved unanimously after a motion from Sanjib Som and a second from Martin Navarro. The minutes of the Memphis, Tennessee meeting were approved unanimously after a motion from Roger Wicks and a second from Mike Sharp.
D.2 Working Group/Task Force Reports The next order of business was the presentation of the reports of the various working groups and task forces. See the following sections for the individual reports:
D.2.1 IEEE PC57.12.01 - Dry Type General Requirements Chair Casey Ballard
The working group met in the Georgia 4,5 Rooms of the Sheraton Atlanta Hotel The meeting was called to order at 1:17 PM by Chairman Casey Ballard The meeting was convened with 19 members (out of 28 – therefore a quorum was reached with 68% attending) and 30 guests present with 5 guests requesting membership. The attendance was reported in the AMS. Introductions were made by all participants The agenda was approved unanimously being no negative votes. The minutes of the Memphis, TN, November 2, 2015 meeting were approved unanimously being no negative votes Old business
- The chair talked through a list of suggested topics from TF members and agreed to provide both the presentation and a red lined version of 12.01 before the next meeting.
o Definitions Section on no load losses – standard requires no load loss tests to be performed on cores with top yoke temperatures under 40°C but does not give method to correct core losses if above 40°C Does correction belong in 12.01 or 12.91- will be decided by subcommittee Proposal is to use equation from 12.00 using top yoke instead of top oil Concerns were voiced that core may still be hot when tested and how this would
impact the stabilization of cold resistance measurements for the windings
Annex D
Page 2 of 13
o Maximum altitude Sections 4.2.4 and 4.2.5– no comments to the proposal o Service Conditions Section 4.2.6i– Rick Marek to provide wording for first revision
document o Rated Power Wording Section 5.4.1– no comments to the proposal o Rated Voltage Wording Section 5.5.2– no comments to the proposal o Thermal Protection Section 5.11.3 from Phil Hopkinson
Suggested we needed a method that would be equivalent to IEC 60076-11 F0/F1 rating
Rick Marek pointed out that test was to determine how much energy a transformer would add to a fire – not if the transformer would catch on fire due to an internal fault
Phil conceded that they were different and removed the proposal o Standard BIL Ratings Table 5
Discussion focused on moving 15kV from 60 to 95 BIL, but grew to include 8.7kV class, 601V class and eventually the entire table
Chuck Johnson proposed to make 95kV BIL the standard for 15kV while still allowing a customer to specify 60 or 75kV BIL. This was proposed to match the standard levels for distribution liquid immersed transformers.
Phil Hopkinson added that increasing BIL may help with fast transients but coordination studies are still required
• Sanjib Som did not support increasing BIL to address transient issues since these should be prevented to reach the transformer by using suitable suppressors.
The proposal was tabled and the chair will send out an email ballot as to whether the members would like to address this issue or not
o Extended Sound Measurement – proposal to add sound measurements after 6 hours on no load and for multiple windings stacked vertically Chair commented that this belongs in 12.91 for definition before adding it to 12.01
and Sanjib agreed o Ambient Temperature Section 4.1.2 – Sasha Levin proposed to use the 30 day average
method from IEC instead of the 24 hour average used by IEEE Comments from the group were that a customer can specify a higher temperature
ambient and that changing just in 12.01 may cause issues since 12.00 would not change
No further discussion was held and issue was tabled o Minimum Voltage Rating Scope – change to 208 from 601 – no support from the group o Applications Section 7.5.d – Inclusion of furnace and traction transformers – no support from
the group
New business
- The chair asked for a Secretary and Sasha Levin agreed to volunteer. The chair expressed his gratitude.
Next meeting: Fall 2016, Vancouver, British Columbia, Canada, October 23-17, 2016 With no further business, the meeting was adjourned at 2:29 PM by the chair.
Annex D
Page 3 of 13
Chairman: Casey Ballard Secretary: Sasha Levin
D.2.2 IEEE PC57.12.60 - Dry Type Thermal Aging Chair Roger Wicks
The working group met in the Georgia 4-5 Room in Atlanta Georgia Hotel. The meeting was called to order at 9:30 AM by Chairman Roger Wicks. Roger explained that he would be assuming the Chair roll as former Chair Casey Ballard had stepped down to assume Chair roll of C57.12.01. Introductions were made and attendance sheet was circulated. The meeting was convened with 27 people in attendance / 17 members present (Quorum reached.) The minutes from Fall 2015 WG meeting in Memphis and agenda were approved unanimously.
Old Business / Review of last meeting:
1. Reference Temperature Explanation Roger Wicks presented information on Thermal Endurance and Reference Time that was presented at previous meeting. Explained that there are different reference times associated with different standards, and that 12.60 uses a “reasonable” reference time of 40,000 hours. Using longer reference requires longer extrapolation of data, making results less statistically acceptable. He reminded the WG that it was agreed to retain the 40,000 hour reference time at the last meeting in Memphis. Roger also explained that in order to achieve completion of test with desired (low) number of hours for high temperature test point, very high temperatures must be used.
2. Full-Size Working Coil discussion Roger reviewed the agreed upon definition for Full-Size Working Coil (as discussed at Fall 2015 Memphis meeting), described as: Small-scale transformer coils. Test samples should be actual full size working coils capable of meeting the requirements of IEEE C57.12.01 and passing the testing per IEEE C57.12.91. Coils shall be selected to represent the transformer range for commercial use…
3. PD Measurement as a trending test
Reviewed previous proposal of adding information related to PD in C57.12.60. Reminded WG that proposal was approved to include into the standard information on PD as part of an informative annex.
4. Major Insulation materials and method for changes (major) Reviewed problem of current standard not having clear information on how to modify an established EIS. A proposal had been made at previous meeting to utilize single point test in place of currently used Sealed Tube (CCT) test for materials deemed as Major insulation but was not voted on due to need for more discussion.
Continuation of discussion topics from previous meeting: 1. Accuracy of model types and methods for changes (voltage and other) Mark Raymond reviewed that both full size coil and “model” techniques have been used to developed MV EIS’s, but an abundance of data on completed systems was not available. Mark explained that changes are handled on a case by case basis, and that modifications such as changing a varnish that was present in original EIS may require full three point temperature test. Explained that models that are used in testing may not be suitable or capable of being tested with Impulse test. He also explained that in IEC, the German NC has proposed a new standard for development of MV EIS’s using “model” technique (IEC 61857-41). This standard has not yet been
Annex D
Page 4 of 13
released. This standard will use requires three models as opposed to the IEEE requirement for thirteen. Casey Ballard asked if there was data on EIS’s tested both ways (model and full size coil), but group was not aware of any data. A discussion regarding possible ways to approve modification/substitutions for materials by using chemical analysis or comparisons of assigned temperature indexes. Solomon Chiang suggested that IR comparison of materials may be useful, but perhaps would not capture all differences between materials. Roger Wicks explained that different temperature indexes may be assigned to the same material depending on the property that is measured.
2. Extension of cold shock testing A discussion regarding the possible extension of Cold Shock testing to all types of dry-type transformers was held. Currently cold shock is only required for solid-cast and resin-encapsulated transformers only. Chuck Johnson explained that these types of transformers were subject to (epoxy resin) cracking, although expansion/contraction in other types (including OVDT) may also cause cracking of insulation. Solomon Chiang pointed out that different expansion rates for Cu and Al may also affect potential cracking. A motion was made by Casey Ballard, seconded by Tim Mai to strike the reference to “solid-cast and resin-encapsulated designs only” in Clause 4.6 so that all transformers were subject to cold shock test, followed by discussion. Casey Ballard explained that changes to terminology (including resin encapsulated) may affect how future designs may be tested. Casey reminded the WG that if we did nothing, all transformers would need to be cold shock tested based on the changes in terminology. A discussion of how future modifications (single points) would be tested (with or without cold shock). Dhiru Patel asked that we consider how EIS’s that were tested without a varnish would be handled. Following the discussion the motion was approved (14-1) to modify Clause 4.6, striking reference “solid-cast and resin-encapsulated designs only” in the working Draft document. 3. Ratioing Up or Down from tested EIS Roger asked the WG if it is acceptable to ratio up or down stress of a new design relative to stress levels tested in an approved system. Roger presented the following examples:
• Example 1 – are the stress levels of a 15kV coil tested per 12.60 acceptable to ratioed up for 72kV
• Example 2 – are the stress levels of a 36kV coil tested per 12.60 acceptable to be ratioed down to 5kV
Mark Raymond discussed that using lower voltages and ratioing up may be acceptable to UL, but would like guidance from IEEE regarding what lower voltage levels would be acceptable. A motion to approve use of ratioing down (Example 2) was put forth by Casey Ballard and seconded by Sanjib Som. After discussion, motion was not passed and it was decided to defer approval and investigate method further.
4. Work Assignments for Revision
Assignments for the work were reviewed and volunteers solicited. The chair requested that the volunteers provide at least an outline of their thoughts for work on these areas by the end of May. • Review use of Partial Discharge as a trending test. – Tim Mai and Louis Nemec • Review proposal of using One Point Test as a way to modify or change a Major insulation
in and approved EIS. Review use of Sealed Tube CCT test to approve changes to Minor insulation in an approved EIS – Dhiru Patel, Mark Raymond, Roger Wicks, Ashley Reagan, Solomon Chiang
Annex D
Page 5 of 13
• Review proposal to use “ratio down” method to approve new (lower) voltage class. – Casey Ballard, Chuck Johnson, Dhiru Patel
• Review other changes including Model Definition and Cold Shock sections. – Mark Gromlovits, Sanjib Som
New Business
• Ashley Reagan asked question of how the number of test units specified in model test (thirteen) was determined. No one at the meeting was aware of the reason.
• Chuck Johnson reminded WG of 2019 deadline to complete work on this PAR.
The meeting was concluded at this point due to no more time. It was confirmed that the WG would meet again at the Fall 2016 Transformer Committee Meeting in Vancouver.
Meeting was adjourned at 10:45AM Chair: Roger Wicks Co-Chair: Dave Stankes
D.2.3 IEEE PC57.12.51 - Dry Type Product Standard “> 500kVA Ventilated” Chair Sanjib Som
Meeting convened at 11:03 AM
Attendance: 26 total (13 members, 13 guests); since total members is 15, quorum was archived.
The chairman brought the meeting to order, circulated the roster and encouraged our guests to request membership if they would like to join the working group.
Mark Gromlovits was introduced as the new secretary.
A few technical projector difficulties delayed the start of the meeting.
The chairman reviewed the agenda with all present.
The chairman reviewed the meeting minutes from the previous meeting and advanced a motion to approve the minutes. Chuck “so moved” John “second”, minutes was unanimously approved.
The chairman explained to the group that he will need to review all of the changes that Casey Ballard and Tim Holdway had discussed and introduced in the red line copy of the standard. We were to concentrate on the “Title” of the document for the first part of our meeting.
The chairman pulled up a copy of the standard for the group to view and initiated the discussion regarding the title.
The chairman pointed out “501 kVA” was part of the title, however in several places in the document <500 kVA was mentioned (see example at 6.6.2). This is most certainly a conflict that needs to be resolved. Further discussion took place for the next 25 minutes.
Annex D
Page 6 of 13
Chuck Johnson suggested combining 12.51 and 12.50 – his point “does this standard truly represent the standard from 1 – 501 kVA”. The chair clarified that combing of the two standards are still on track.
Casey pointed out that using “General Requirements” in our title present confusion with regards to 12.01. Several members present pointed out that we have “ventilated” in our title which differentiates from 12.51.
Chuck Johnson went on to expound on the intent of several standards with regards to the word “General” in the title.
Dhiru Patel commented that this document covers upto 34.5 KV whereas C57.12.01 covers upto 69kV. There was no further discussion on this topic.
Casey Ballard reminded the group that any changes we make to 12.51 need to correspond or rather not conflict with 12.01. This led to a discussion regarding the “interchangeability” and “mechanical” nature of the document. He said “it’s basically all the stuff that was left out of 12.01”.
Chuck Johnson mentioned that this used to be a NEMA document and the title was simply brought forward when it switched to IEEE.
Casey noted that this document references other standards for almost everything. He stated “we only kept what was different”. Further to this he said “we may not even need kVA in the title”. More discussion took place.
The chairman again made it clear that the title is our responsibility and that we need to focus on it. We reviewed the scope to assist in helping define the title.
Casey mentioned again that “all electrical stuff had been removed from this document, only mechanical and accessories were left in 12.51”.
A discussion regarding 12.55 and how it relates to enclosures took place.
The group expressed concern that 12.51 was kind of caught between all of the other standards.
More discussion took place regarding the “kVA’s” mentioned in the title and simply changing it to a lower kVA like 200 kVA. Casey strongly opposed removing or changing the kVA in the title. He wanted to change it completely and remove kVA entirely.
The first motion was made by Casey Johnson to change the title to – “Ventilated Power Transformers mechanical interchangeability and accessories”. Discussion regarding the motion took place over the next 15 minutes.
Chuck Johnson suggested adding “Basic” to the title. Jerry, Phil and Casey objected to this.
Casey Ballard then said “I think this is more of a guide than a standard”. Casey reminded the chairman that he can change this form a standard to a guide because we are dealing with the title. It was agreed that Chairman needs to contact Jim for clarification on this.
More title discussion took place. Several random suggestions were thrown out and quickly dismissed – adding “for”, remove the word “power” and several others.
Annex D
Page 7 of 13
After some discussion the original motion was revised to “Guide for Ventilated dry type transformers, for mechanical interchangeability and accessories”. This motion was then further revised by Casey to remove the words “and accessories”. Casey again made the motion and Dhiru seconded the motion.
Before we could all agree on the title, Casey amended his motion again. The title we agreed to was “Guide for mechanical interchangeability of ventilated dry type transformers”. A vote was taken and the new title motion passed 11 yes, 0 no; that is no opposition from any attendee including our guests.
The chairman went back and asked about the blank section in the document at section 5.3. Casey said it was the only way to show a change in a word document that would show up in a .pdf.
The chairman requested that Chuck Johnson help him get a “clean” copy of the standard to work with.
Matt Ceglia form IEEE chimed in and informed the group that if IEEE cannot get a good clean copy of a standard, they will scan it and send a .pdf. Unfortunately that is the only option at times.
Casey asked about the PAR revision and the chairman stated he will work with Standards coordinator.
Casey also asked when we would vote on this standard – the chairman said he hoped to get first ballot of the working group this year.
Next meeting: Fall 2016, Vancouver, BC, Canada October 23-27, 2016.
The chairman asked for a motion to adjourn at 12:17 PM. Phil made the motion and Jerry Murphy seconded the motion.
The meeting adjourned at 12:18 PM.
Respectfully submitted,
Chairman: Sanjib Som
Secretary: Mark Gromlovits
D.2.4 IEEE PC57.12.58 - Dry Type Transient Analysis Chair Roger Wicks
Roger gave a presentation on the status of P57.12.58 since it had no formal meeting and the text is included below:
Annex D
Page 8 of 13
After Roger’s presentation Sasha Levin asked if the process for conducting the test was needed before circulating the document to the Sub Committee for their opinions. Klaus Pointner also noted that simulation software was available for this purpose and the group acknowledged his comments. Sanjib Som made a motion to send the document as-is to the membership of the Dry Type Sub Committee for their vote of approval to move to ballot. If they didn’t approve then comments would be required. Martin Navarro seconded the motion and it was approved w/o any objection.
D.2.5 IEEE C57.12.91 - Dry Type Test Standard Chair Derek Foster
The Working Group met in the Georgia 4,5 meeting room There were 14 members and 18 guests present. A quorum of 81.2% was reached. The agenda was approved. Motion by Chuck Johnson, second Tim-Felix Mai. The minutes of the November 3, 2015 meeting in Memphis were approved as written. Old Business
• The Chairman advised that this is now a Working Group, since the PAR for revision was approved at the March NESCOM meeting. Chuck Johnson commented that people should review the purpose and understand that C57.12.91 is about gathering test information, NOT a pass/fail determination. C57.12.01 has pass/fail information.
• Sanjib Som presented a proposal to measure current during the applied voltage test. After some
discussion, a vote was taken with 2 votes for the proposal, 10 against and 1 abstain. Proposal rejected.
• Sanjib Som also presented a proposal to measure acoustic noise during a full load current test, to be a Special Test. After discussion a vote was taken with 12 against, 0 for. Proposal rejected.
• Casey Ballard then explained a proposal to apply a correction factor to no-load losses if the core top yoke temperature is greater than 40 °C. After discussion a vote was taken with 10 against, 0 for. Proposal rejected.
Annex D
Page 9 of 13
• Tim Holdway had proposed the addition of two clauses in the dielectric test section, one relating to the applied voltage testing of transformers for installation and/or testing at altitudes above 1000 m and the second relating to impulse testing of transformers for installation and/or testing at altitudes above 1000 m. These clauses require the application of a correction factor which can be found in C57.12.01. After discussion a vote was taken with 0 against and 10 for. Clauses as written will be added to the standard. Casey Ballard suggested that a similar clause should be added to the temperature rise section and Carl Bush agreed to provide proposed wording.
New Business • • The Chairman stated that in section 3 of the standard (Definitions), there is a single line statment
referring readers to C57.12.80, and asked if the Working Group considered that some definitions should be added to the standard. Chuck Johnson suggested that the group may want to consider adding some definitions specific to dry-type transformers. This item will be reviewed at future meetings. Rick Marek added that C57.12.80 is being re-opened and we need to clarify the definitions of various dry-type transformer constructions.
• The Chairman also stated that currently there is no reference to PD testing in C57.12.91. A reference to PD testing in an earlier revision had been removed, but the Chairman asked if the group believes that a reference should be re-instated. A vote produced 6 for and 2 against. A reference to PD testing will be added to the standard. Dhiru Patel and Chuck Johnson then said that other tests would also need to be in referenced in C57.12.91. Chuck Johnson moved that all tests mentioned in C57.12.01 be referenced in C57.12.91. A vote showed 10 for and 0 against.
With no further business, the meeting was adjourned at 6:05 pm. The Working Group will meet again at the Fall 2016 meeting in Vancouver.
Chairman: Derek Foster Vice Chairman: David Walker
D.2.6 IEEE PC57.16 – Dry Type Reactors Chair Art Del Rio
The new working group for the revision of C57.16 met for first time in the ‘Atlanta 4’ room of the Sheraton Hotel on Monday March 21,2016, at 4:45 PM. The meeting was called to order at 4:45 PM by the Chair Art Del Rio. As this was the first meeting following the PAR approval, it was held off-schedule. There were a total of 10 participants, 10 requesting and granted membership, noting that 6 of these participants were part of the WG for the 2011 revision. The meeting was opened with the introduction of participants and the circulation of attendance roster. Meeting notes:
Annex D
Page 10 of 13
Meeting Agenda (unofficial) • Introductions and Attendance Sheets.
• Background.
• Topics for Discussion.
• Membership
• Adjournment. Minutes from previous meeting
No minutes from previous meeting as this was the first meeting. New Business:
1. The administrative information related to the PAR approval was presented to the group by the Chair.
Type of Project: Revision to IEEE Standard C57.16-2011 PAR Request Date: 24-Nov-2015 PAR Approval Date: 05-Feb-2016 PAR Expiration Date: 31-Dec-2020 Status: PAR for a Revision to an existing IEEE Standard Root Project: C57.16-2011 Expected Date of submission of draft to the IEEE-SA for Initial Sponsor Ballot: 06/2019 Projected Completion Date for Submittal to RevCom: 12/2019 2. The existing Scope and Purpose sections of the C57.16 standard were presented to the group for
review and comments. The participants were encouraged to submit suggestions to the Chair as topics for discussion in the next meeting.
3. A reference to the information available in MyProject related to the balloting process for the previous 2011 revision was presented. It was noted that many of the comments requiring resolution during balloting were related to TRV and mitigation methods.
4. Charles Johnson volunteered to compile meeting minutes from old meetings related to the 2011
revision and send them to the Chair as background information and to share the existing recent history on the C57.16 standard with others.
5. A volunteer for the role of Secretary will be requested in the next meeting. Meeting adjournment: Meeting was adjourned at 5:30 PM Next meeting: Fall 2016, October 23-27; Vancouver, BC CANADA. Respectfully submitted, Chairman: Art Del Rio ([email protected]) Secretary: TBA
D.2.7 IEEE PC57.124 – Dry Type Partial Discharge Guide
Annex D
Page 11 of 13
Chair/Co-Chair: Thomas Prevost/Richard Marek Secretary: Open
The first meeting of the task force took place at the Capital Center meeting room of the Sheraton Hotel. The meeting was called to order at 8:03AM by Tom Prevost, Chairman with 41 present.
This was the first meeting so Tom stated that this was only a task force meeting. He explained the rules of a PAR and the technical definition of a PAR as reviewed by NESCOM. He explained the indemnification provided by NESCOM approval. The reason for the explanation was that today’s meeting will determine the Scope and Purpose of the document. The group needs to review the 1991 document which was reaffirmed in 2000. He then noted that reaffirmation is no longer permitted.
Tom then reviewed C57.113 which is a similar document for liquid-immersed transformers. C57.12.01 is the base document where the PD requirements were revised to match IEC more closely. Tom showed the agenda and asked if it was acceptable. However, since the group was only a task force, it could only be informally approved. All present approved. Tom also noted that assuming this was the last Task force meeting, the next meeting in Vancouver would be a working group meeting and anyone requesting membership at that meeting would become a member automatically.
Tom noted that C57.12.01 was revised in 2015 and it sets limits and specific procedures for performing the test. He reminded all that C57.124 is the procedure with no limits which should be found in the base documents. Chuck Johnson requested the opportunity to speak describing the history of dry-type PD testing going back to Tony Jonetti who changed C57.12.01 where the limits were first set. He noted that there were different limits for “open wound” compared to epoxy vacuum cast and expressed the hope that the procedure will also help to interpret as well.
Detliv Gross described the need for PD evaluation of epoxy cast transformers. Chuck Johnson then clarified the PD test is required for epoxy cast but only considered an “other” test for “open wound” units. C57.12.01 was then reviewed demonstrating that the requirement is mandatory for solid cast.
Dr. Hem Shertukde noted a bubble is a flaw to be located and asked if acoustic or apparent discharge was better. Detliv Gross noted that in some bubble sizes, it may take 15 minutes or so for the PD to initiate so the current procedure in C57.12.01 may be inadequate. Tom questioned where a note explaining this timing would be placed. He felt is should be in the C57.12.01 document and not in the C57.124 document.
The scope and purpose from the last revision were then shown for discussion. Tom noted that the scope is required, but the purpose is optional. His preference was to include a purpose. IEC 454 was a previous reference but is no longer in existence. In fact all of the IEC references were out of date and required updating. The scope and purpose of C57.113-2010 were read and it was noted that they were nearly the same as in C57.124. One solution could be to revise C57.113 to include dry-type units. Tom asked Detliv if this might be feasible. He noted that the physics of discharge and the failure mechanism are completely different. He does not feel combining the two would be feasible. Tom noted that the core of the document is the same for setup and procedure but that interpretation is in an annex.
Chuck Johnson asked that we make sure the document includes procedure and interpretation. Aleksandr Levin noted that there are no bushings on dry-type transformers. It was decided to continue as planned. Tom asked if anyone felt the document was not needed. Detliv noted that acoustic measurement could be used especially for location purposes. No one was against proceeding to request a PAR. Tom noted he prefers the scope from C57.113 as a starting point and felt it could easily be modified. Also, he preferred the wide band apparent charge method.
David Walker asked if reactors would be included. Casey Ballard noted that reactors have their own requirements in separate documents. Chuck Johnson noted that C57.12.01 does not include reactors. C57.16 is the standard for reactors. (Can French) noted there is a difference between transformers and reactors so no need to include them in the scope. Only a corona test is performed since there is no core
Annex D
Page 12 of 13
and the turn to turn stress is very low. However, this only applies to air core reactors and it could apply to iron core reactors. Casey Ballard noted there was no definition for reactors.
Tom asked David Walker why he asked the question. He said other facilities in his company make iron core reactors and he just wondered if they would be included. He noted that reactors are included in C57.12.00. Chuck Johnson noted that others should be included if the scope is expanded and Tom asked if this should be asked at the dry-type subcommittee meeting. Chuck suggested the group proceed as initially planned and wait to see if the SC generates a request. Roger Wicks suggested keeping iron core reactors with the rest of the reactor documents. Detliv recommended omitting reactors and then bring it up at the SC meeting. By voice request, no one opposed the suggestion.
Tom suggested starting with the C57.113 scope and wording was discussed. Detliv noted that location detection was unnecessary. Casey Ballard preferred to place location information in an annex. Mark Gromlovitz noted that PD location information is appropriate for an annex. Rick Marek noted that there is a distinction between cast and VPI and location for VPI can be useful. Hem and Tom both noted that they preferred to also have purpose. Chuck Johnson said the purpose statement for C57.113 should be reviewed. However, Tom does not like this purpose statement. He felt the purpose conflicts with the scope and requested the group opinion. Chuck Johnson noted the purpose should be the procedure with some equipment notes. Tom questioned why it included the narrow band when wide band is what is required by C57.12.01. He questioned if narrow band were even used. Detliv noted that high repetition rate is frequent and not detectable with narrow band. Chuck expressed his pleasure at having the expertise of Detliv, which the group needed.
It was decided that interpretation should not be in the scope or purpose, since the plan is to put it in an annex. Tom noted that the document is a recommended practice so methods are the core. A guide would have information such as this in the body but not with a recommended practice.
Bill Lazerlee who was on the revision of IEC 60270 noted that some variation was possible with wide band since the frequency range can be selected. Detliv noted that the frequency range was widened with the latest version of 60270. Also, the frequency spectrum can be wider with the latest equipment.
Tom noted that the first meeting should be a tutorial and asked Detliv if he would help and he agreed.
The meeting adjourned at 9:15 AM. After Tom’s presentation he asked for volunteers to fill the Secretary roll and nobody volunteered. Then Tom Prevost made a motion based on the meeting minutes and Jim Antweiler seconded. There was discussion on what standards should be referenced in the PAR submission with IEC 60076-11 and IEEE C57.12.01 specifically suggested. Detlev Gross noted that IEC 60270 High-voltage test techniques – Partial discharge measurements, has no equal in IEEE. The vote resulted in 16 for, 0 against, and 1 abstention.
D.3 Old Business
D.3.1 IEEE PC57.94 - WG Dry Type O&M Guide Chair Dave Stankes
Dave Stankes was unable to attend the meeting, but shared this note with the chair in advance: Thanks for reminding me that we should celebrate our accomplishments regarding C57.94! Since our last Fall 2015 meeting, 1) PC57.94 was approved as a revised standard by the IEEE-SA Standards Board on December 5, 2015, and 2) IEEE Std C57.94-2015 officially published on February 26, 2016 This project was completed on time.
Annex D
Page 13 of 13
Thanks to all who contributed to this Revision (including Sanjib, Tim, Dhiru, Casey, Jerry Murphy, Rick and Roger among others! Wahoo!!!!!
D.4 New Business
D.4.1 Chair’s Comments - The chair addressed some requirements of meeting minutes as other SC’s had been missing these
according to Sue McNelly.
o Title of WG or TF
o When and where the meeting occurred
o When and if the group plans to meet again
o Attendance of members, guests, and those requesting membership. Attendance to be recorded in the AMS.
- Any WG must bring the document to the SC for approval before going to ballot
- The Transformers Committee Chair has asked all TF and WG chairs to capture the ‘why’ behind the decisions made to help out in future revisions
- The WG chair is responsible for checking all grammar and spelling *before* sending the document out for ballot.
- Next meeting: Spring 16, Atlanta, GA, March 20-24, 2015.
D.5 Adjournment With no further business, the meeting was adjourned at 2:43 PM. Chairman: Charles Johnson Secretary: Casey Ballard
Page 1 of 3
Annex E HVDC Converter Transformers and Reactors Subcommittee
March 21, 2016, 3.15 pm Atlanta, Georgia
Chair: Michael Sharp Vice Chair: Les Recksiedler Secretary: Ulf Radbrandt
E.1 Introduction / Attendance
Introductions were made and the attendance list circulated.
There were 13 members and 15 guests present. No guests requested membership
The total membership of the SC is 17. We needed at least a total of 9 members to be present in order to have a quorum. This was achieved.
The agenda for this meeting was approved.
E.2 Approval of the minutes of the October 20, 2014 meeting in Washington, DC
The minutes from the Memphis meeting (Fall 2015) were approved after a motion by Pierre Riffon, which was seconded by Klaus Pointner.
E.3 Brief report on the meeting of the Administrative SC
Each SC shall review their scope in the Transformers Committee Operations Manual.
E.3.1 Review of the scope for the HVDC SC
The HVDC Converter Transformers and Smoothing Reactors Subcommittee section in Clause 3 “ IEEE Transformers Sub-Committees’ Scope” in the Transformers Committee Operations Manual was shown on the screen and discussed.
At a previous meeting there had been discussion to include converter reactors (for voltage source converters) in IEEE Std 1277. Therefore a vote took place regarding if we should include converter reactors in the scope. The result of the voting was unanimous to do that. The 2/3 approval rate was thereby met.
E.4 Working Group Reports
E.4.1 WG IEC/IEEE 60076-57-129 – Ulf Radbrandt (IEEE) and Mats Berglund (IEC), Co-Chairs
This joint workgroup has had one joint meeting since the last IEEE Transformers Committee Meeting (Memphis, Fall 2015). That meeting was in Atlanta 1.5 days in March 18-19 2016, just prior to this IEEE meeting.
The agreements and actions from the Milan meeting were the following:
• Mats Berglund (ABB, Sweden) has now taken over as IEC chair for this joint WG. However, the preceding IEC chair, Anders Lindroth, did still chair this meeting.
• Result from a CD within IEC were discussed and actions on each comment were decided
• There were 64 editorial comments. 50 were accepted, 5 were partly accepted, 1 was decided to be checked and 8 were not accepted
Annex E
Page 2 of 3
• There were 33 technical comments. 20 were accepted, 10 were partly accepted and 3 were not accepted.
• Comments/proposals from the IEEE HVDC SC meeting in Memphis were discussed and actions on each comment were decided
• There were 18 comments/proposals, including 12 proposals from Pierre Riffon from his check if we can refer to general standards for requirements on sections, of the actual edition of IEEE C57.129, that have been excluded from the dual logo document. 9 were accepted, 3 were partly accepted and 6 were not accepted
• The action list from the joint WG meeting was as follows
• Anders Lindroth will introduce numbering of the equations and also check that they are correct
• Anders Lindroth will change font in title of document
• Should we use a.c. and d.c. alternatively AC and DC? It should be consistent in the document.
• Anders Lindroth will check with Paul Jarman what is preferred within IEC.
• Eric Davis will check with Erin Spiewak what is preferred within IEEE.
• Ulf Radbrandt to correct the text “c, d)” in Figure B.2 to be consistent
• Anders Lindroth will number the notes if more than one in a section.
• Anders Lindroth will revise the figure for the polarity reversal test to have 30 min test time after the second reversal.
• Anders Lindroth will check all links in Table 1 (test table).
• After the document is updated with the above it will be circulated within the joint WG for final comments.
• Thereafter it will be sent to IEC TC 14 secretary to be issued as a CDV.
• The same text should be sent out for ballot within IEEE in parallel.
• The need for any further meeting with the joint WG will be decided based on the comments on the IEC CDV and the IEEE ballot.
E.5 Discussions and agreements regarding the work for a Dual Logo standard for converter transformers
Ulf Radbrandt made a presentation of the progress of the joint IEC/IEEE WG meetings (according to clause E.4 above). The discussions and agreements during and after the presentation were as follows:
• Clause 6.1 “General” in IEEE C57.129 handles requirements on rapid replacement of converter transformers or components. That is often a requirement in HVDC installations. The dual logo document does now include information (that this kind of requirements should be given by the purchaser) in an informative Annex (Annex D, Transformer Specification) but not in the normative part of the document.
• Clause 6.4.2 “Bushing current transformers” in IEEE C57.129 is not represented in the dual logo document. The reason is that this should be handled by the general transformer standards. Information that requirements on current transformers should be given by the purchaser is given in Annex D (Transformer Specification) in the dual logo document.
• Clause 6.4.4 “Accessories” in IEEE C57.129 is not represented in the dual logo document. The reason is that this should be improved in the general transformer standards and not in the dual logo document. IEEE C57.12.10 covers most of this, but not fiber optic sensors. IEC 60076-22 is
Annex E
Page 3 of 3
under creation and will probably cover most of this. During discussion regarding the optical fibers, it was commented that the optic fiber sensors are extra important for converter transformer since it is much more difficult to estimate the hot-spot factor and the hot-spot locations due to the harmonics. The question, if information regarding fiber optic sensors should be included, will go back to the joint WG.
• The table with limits for the increase in concentration of dissolved gases in oil during overload testing has been removed from Annex A “In service overloading of HVDC converter transformers”. The reason is that limits should be agreed between manufacturer and purchaser. Information that additional information is available in IEC 60072-2 and IEEE C57.130 is added. During discussion regarding this, it was commented that the limits were included in IEEE C57.129 since it is important the transformer does not produce excessive gases during overload tests.
• It was requested and agreed that when the updated dual logo document is circulated within the joint WG, then it should be circulated within the IEEE HVDC SC also.
• The parallel review process (CDV in IEC and Ballot in IEEE) was discussed. What would happen if there are very few comments in the IEC CDV but a lot of negative comments in the IEEE Ballot? Could the situation occur, that the document must be changed a lot to satisfy IEEE but it is impossible from IECs point of view? This question will go back to the joint WG. Erin Spiewak and Paul Jarman should be consulted regarding this.
E.6 Old Business
E.6.1 Revision of IEEE Std 1277
The chair (Michael Sharp) had earlier asked for volunteers to chair a working group to review and update IEEE Standard General Requirements and Test Code for Dry-Type and Oil-Immersed Smoothing Reactors for DC Power Transmission, IEEE Std 1277. Klaus Pointner has volunteered and will be chair. Members for the WG are needed. A vice chair and a secretary would also be valuable. One of these should be experienced in the formalities within IEEE.
Requirements on converter reactors (for voltage source converters) should be included in IEEE Std 1277.
E.7 New Business None.
E.8 Adjournment
The meeting was adjourned at 4.15 pm.
Page 1 of 6
Annex F Instrument Transformers Subcommittee
March 23, 2016 Atlanta, GA
Chair Ross McTaggart
F.1 Introductions
The attendees introduced themselves and reported affiliations.
F.2 Quorum
19 of 30 members were present - quorum attained
Also 37 guests attended
F.3 Approval of minutes – San Antonio, Tx meeting
Motion by David Wallace & seconded by Vladimir Khalin
F.4 Review of Agenda
F.5 Status of C57.13 Standards
The status of the various standards handled by the ITSC was reviewed. C57.13 has been approved by RevCom and is awaiting publication. C57.13.5 has just started the revision process. Pierre Riffon is the chair of this effort. After the Memphis meeting a survey was sent out regarding whether C57.13.2 should be revised or withdrawn. The results of this survey were discussed. Eddy So and Vladimir Khalin expressed an interest in keeping the standard and in particular Eddy So noted that the standard is in used by NRC. It was determined that the standard will be revised but the start date and leadership was not settled in this meeting. A TF is being co-chaired by Zoltan Roman and Ross McTaggart to revise the CCVT standard and it held its first meeting here in Atlanta.
Working Group Reports
F.5.1 Working Group on Current Transformers with mA range (WG C57.13.7) -
Chair: Henry Alton, Vice-Chair: Adnan Rashid
This WG did not meet in Atlanta. The Standard is ready for balloting
F.5.2 TF on Station Service Voltage Transformers - D Wallace
The meeting of this Working Group met at 8:00 AM as convened by Chair David Wallace. Roster sheets were circulated for attendees to sign in. A total of 42 people were in attendance with 20 members and 22 guests. 20 out of 26 members present, therefore quorum was met. Two guest requested membership. A motion to accept the agenda was made by Pierre Riffon and seconded by James McBride. There was no discussion and the motion was accepted, unanimously.
Annex F
Page 2 of 6
Motion to accept the minutes of the previous meeting was offered by Vladimir Khalin and seconded by Thomas Sizemore. After brief discussion and agreement to correct the place of the last meeting from San Antonio to Memphis, the motion was accepted, unanimously. Pierre Riffon made a presentation about the use of a Chopped Wave Test to assure the integrity of SSVTs. The presentation showed that there was good correlation between successful tests and field performance. Subsequently, Igor Ziger made a presentation about the use of an Internal Arc Test to accomplish the same purpose. This presentation provided information about the types of SSVT failures experienced. It indicated that the majority of failures were main insulation of the winding. The presentation concluded that the Internal Arc Test is not a desirable means to assure successful field performance SSVTs. There was discussion of the continuing the requirement for the use a specific size wire as a fuse for testing. After some discussion, it was agreed, unanimously that the next draft of the standard would change the requirement from a specific wire size to a wire size determined by the manufacturer that will melt within 30 electrical degrees. There had been 95% acceptance of the draft of section 6.21 in survey #1 conducted prior to the meeting. There was one comment about eliminating the inclusion of synthetic esters. After discussion, it was agreed to keep the reference to synthetic esters in section 6.21, subject to determining if there was standard for synthetic esters similar to the standard for natural esters. A discussion was held in regards to the accuracy clause to be inserted into the standard. Due to the lack of time, it was agreed to send out a survey to the workgroup on the accuracy clause. The results of the survey will be discussed at the next meeting. Draft 3 of the standard will be released to the workgroup for review and comments. The comments will be discussed at the next meeting. A motion to adjourn the meeting was offered by Patrick Rock and seconded by James Bride. The motion carried unanimously without discussion. The next meeting will be at the Fall 2016 Transformers Committee meeting in Vancouver, BC Canada.
F.5.3 WG PD in Bushings & PTs/CTs PC57.160 - Thang Hochanh
Attendees: 50 Members attending: 15/28 Agenda: An agenda was presented for the meeting. Minutes: Motion approved David Wallace (1st) & Vladimir Khalin (2nd) 1. Items discussed based upon comments received:
• 6.4 Discussed moving the key from this section to earlier in this document. Decided to move it appropriately after reorganization of the document. Likely just before balloting.
Annex F
Page 3 of 6
• Comment (Shibao Zhang) regarding addition of figure number to resolve comments in 6.4 and 6.5.1 figure 4.a and 4.b. Explanation was provided to clarify text and drawings. Updated version of the draft contained resolution.
• 6.5. 1st paragraph - Clarification on comment regarding calibration. No change was required to resolve the question.
• 7.1 “Casing connection”. New text was accepted to clarify the connection to the primary and ground.
• 7.1 b2 – Comment (Pierre Riffon) regarding the second test object was discussed and proposed text accepted.
Figure 5a and 5b – New test circuit to be provided by Vladimir.
• Incorrect connection fig. 5a and fig. 5b (Pierre Riffon), due to copy and paste action, will be corrected.
• Incorrect connection fig. 7a and fig. 9 (Pierre Riffon), due to copy and paste action, has been updated in draft 5.4 .
2. Presentation by Detlev Gross: Detlev presented several PD patterns and the physical explanation for the partials discharges. Several questions were answered as this presentation was made. The first portion of his presentation was made speaking very generically. The second portion of his presentation was providing a number of specific examples. Numerous comments were made from Thang and Bertrand. Detlev has agreed to make his presentation available to the attendees and the patterns may be used as part of the guide. 3. Additional discussion after the presentation: Mario Lucano asked about the value of C2 in section 6.3.1. A short discussion was initiated. The chair will propose a new text to the group at the next meeting. Fall meeting 2016: This WG plans to continue working at the Vancouver meeting. Next version of draft: A new draft is being prepared to incorporate all of the recent comments and also to modify the format to match the IEEE style guide.
F.5.4 Working Group on Revision of C57.13.5 "Standard of Performance and
Test Requirements for Instrument Transformers of a Nominal System
Voltage of 115 kV and Above.
The WG met on March 22, 2016, from 9:30 am to 10:45 pm. Eight (8) members and forty-three (43) guests attended the meeting. Six (6) guests requested membership. The meeting was chaired by Pierre Riffon, chair of the WG. Mr. David Wallace was the vice-chair.
Attendance has been recorded in the AM system.
Required quorum was met, presence of at least 4 members was required.
This was the first WG meeting since 2009. IEEE C57.13.5 was published in 2009 and will expire in 2019. A revision is now needed.
Annex F
Page 4 of 6
The agenda has been reviewed and a motion to approve the agenda has been made by Mr. R. McTaggart and seconded by Mr. V. Khalin. The agenda was approved by all members present.
Mr. David Wallace will be the co-chair of the WG.
A PAR has been requested and was approved on March 3, 2016 by NESCOM. The PAR is expiring on December 31, 2020.
The chair did produce a first draft of the revision of C57.13.5. This draft (D1) was based on the document which was sent to RevCom for approval in 2009. This draft was distributed by email prior to the Atlanta meeting on February 8, 2016.
Only one reply was received regarding the generic names of C2H4 and C2H6 and discussed during the meeting.
Changes proposed in D1 have been reviewed one by one up to clause 10.9.2, several changes were mainly editorial in nature such as reference clause numbers and date of referenced standards.
Among the proposed major technical changes, the following items have been discussed:
• RIV tests will be limited to units rated 230 kV and above.
• Clause 4.3 "Requirements for accuracy and accuracy calibration systems" will be
aligned with the requirements stated in the new edition of C57.13.
• Allowable leakage rates for gas-insulated instrument transformers at -40°C and -
50°C will be reduced respectively to 1,5%/year and 3,0%/year.
• Ambient temperature range during testing will be changed to +10°C - +40°C.
• Number of reduced impulses waves. The number of reduced impulse waves with
impulse voltage of 50% and higher is now limited to two in order to avoid
insulation conditioning by applying several reduced-waves. After discussion, it
has been agreed upon to allow more than two reduced impulses if the voltage
level is lower than 50% of the full-wave level. This change will be implemented in
the next draft.
• Leakage measurement will be limited to the cumulative test method. An annex
based on the content of clause 10 of IEC 62271-306 (Guide for circuit-breakers
testing and application) describing the test methodology will be added in draft
2.0.
Annex F
Page 5 of 6
• Details regarding chopped-wave test circuit and positioning of the chopping gap
have been discussed and a reference to the latest edition of IEEE Std. 4 will be
made. The additional requirement of not having a resistor in the chopping gap
circuit will be kept.
• Impulse current measurement during impulse tests will not be required if there is
no multiple capacitive grading layers.
• No short circuit withstand test will be required for CTs having a straight primary
conductor and making a single turn. For the thermal aspect of these CTs,
calculations have to be provided.
The chair invited the members and the guests to send comments on D1.
The meeting adjourned at 10:45 am on March 22, 2016. The adjournment motion was made by Mr. V. Khalin and was seconded by Mr. I. Ziger. The motion was approved unanimously.
The next meeting is planned to be held in Vancouver, BC, Canada, on October 25, 2016.
F.5.5 Task Force for PLC Capacitors and CCVT’s
The Task Force held its first meeting at 11:00 AM. It was chaired by Zoltan Roman and Ross McTaggart A total of 41 people were in attendance. 21 requested membership. As this was the first TF meeting, all were accepted as members. The agenda for the meeting was presented and approved. The numbering of the new standard has been discussed. Several proposals were made, the group agreed on IEEE C57.13.9. This will need to be verified with IEEE PSRC as the previous standard (ANSI C93.1) belonged to that group. The title of standard C93.1 has been unanimously accepted as the title of the new standard. The scope of the new standard has been discussed. The scope of the old standard has been accepted with the following suggestions:
• Specify the voltage range that should be covered by the standard (34.5kV
and above was suggested by D. Wallace) and delete “high voltage”
• Delete the following part “secondary compensated-field adjustable
CCVTs.”
It has been agreed to submit a PAR before the next meeting. The members agreed to harmonize the new standard with the current IEC and CSA CCVT standards. Some members asked to verify if it was possible to share these standards with the TF/WG members. The meeting was adjourned shortly before 12:15PM. The next meeting will be at the Fall 2016 Transformers Committee meeting in Vancouver, BC, Canada.
Annex F
Page 6 of 6
F.6 Special Presentation
Eddy So gave a presentation regarding the applicability of TCF/RCF in current applications. Limited questions were asked and the presentation will be made available to the members of the sub-committee. Zoltan Roman presented some experimental data regarding the accuracy classes for VTs. In a future meeting data regarding the accuracy classes for CTs and CVT will be presented.
F.7 New Business
Zoltan Roman brought up the issue of ferro-resonance in Europe. He asked if any of the utilities being represented had similar issues and how they dealt with such issues. Pierre Riffon noted that grading capacitors have caused similar issues for Hydro Quebec in the past and this was at least partially dealt with by changes in how circuit breakers are specified. Igor noted that his company has provided simulations to explain to customers potentially at risk applications. Zoltan requested that a survey be sent regarding ferro-resonance and a review of case studies.
F.8 ITSC Adjournment
Motion to adjourn by David Wallace and seconded by Vladimir Khalin.
The next meeting will be at the Fall 2016 Transformers Committee meeting in Vancouver, BC, Canada.
Page 1 of 15
Annex G Insulating Fluids Subcommittee
March 23, 2016 Memphis, TN
Chair David Wallach Vice-Chair Jerry Murphy Secretary C. Patrick McShane
G.1 Introductions, Roll Call of Members for Quorum, Meeting Agenda Approval, F13 Minutes Approval, and Chair’s Comments
G.1.1 Chair’s comments: a. S16 meeting chaired by Jerry Murphy Vice-Chair, as the Chair David Wallach was unable to
attend. Patrick McShane, Secretary was present. b. A message from the Chair stated that there is an invitation made to the TC’s WGs and TFs to
submit a poster summarizing their current activities for showing at the Dallas T&D meeting Poster Session. Susan McNelly will be there. Patrick McShane asked could the SCIF make a submittal to cover its WG and TFs. Susan stated the proposal did not mention SCs but would check as she sees no reason why that would not be acceptable.
G.1.2 Roll Call of SC members: (Quorum requirement: 25 minimum)
a. Quorum requirement was achieved, with 24 members in attendance at the time of the roll call. When the visual count was made, 24 members were present. However, eventually 33 members and 54 guests signed the roster. One of the three persons that had requested and eligible for membership status if present at roll call, OSCAR PINON and he was welcomed as the SCIF newest Member.
G.1.3 Agenda Approval:
a. SC Vote Outcome: The SCIF F15 agenda approved by Deanna Woods, seconded Kent Miller seconded unanimously,
b. Dave Sundin made a motion to approve the F15 SCIF minutes including a friendly amendment to add two missed guest in the reported count in the posted unapproved. Luiz Cheim seconded the motion. The Members unanimously approved it.
G.1.4 Corrections and Approval of minutes from Spring 2014 meeting in San Antonio, TX: a. SC Vote Outcome: Dave Sundin made a motion to approve the F15 SCIF minutes including a
friendly amendment to add two missed guest in the reported count in the posted unapproved. Luiz Cheim seconded the motion. The Members unanimously approved it.
Annex G
Page 2 of 15
G.1.5 WG & TF Reports Presented at the SC Meeting
G.1.5.1 C57.104 – IEEE Guide for the Interpretation of Gases Generated in Oil – Immersed Transformer (PAR Expiration: 12/31/17)
WG Chair - Rick Ladroga, Vice-Chair - Claude Beauchemin
The report of the WG Meeting was presented at the SCIF meeting by Claude Beauchemin.
The quorum achieved.
Michel Duval made a presentation on advantages and limitations of fault identification methods of DGA.
The meeting reviewed new section 7 of the guide of which was the subject of several conference calls since F15. They didn’t finish the review during meeting. The content of the tables were focused on, particularly importantly steady state values table with several alternative proposed. A poll will be sent out to the WG on the alternatives and corrected tables. Also a flow chart for handling data needs re-work.
See Annex I for the Minutes (unapproved) of C57.104 WG Meeting as Submitted
.
G.1.5.2 IEEE C57.147 Guide for Acceptance and Maintenance of Natural Ester Fluids in Transformers
WG Chair: Patrick McShane, Vice-Chair: Clair Claiborne, Secretary: Jim Graham
The WG Report at the Sub-Committee Meeting: Presented by Patrick McShane:
Since last meeting, PAR revision requested per WG approved motion of the F15 meeting, and approved by NESCOM in late January. Invitation to join voting pool was issued and Draft 2.0 MEC submitted and reviewed by IEEE SA. Draft 3 based on feedback from the MEC review was released for vote. Currently just over 50% of elgible voters have done so, with 90% approval rate, 63 comments (mostly editorial).s
A few technical comments were discussed, primarily some disagreement on what is recommended maximum temperature for surfaces in contact with the insulating liquid during processing. Also a suggestion was made to expand the Introduction of the Guide to provide more background on the Guide history and purpose of the revision. The WG Chair requested those who joined the pool to vote before the deadline.
Jerry Murphy reiterated the need to vote if you signed up in the ballot pool. Due 3/31.
.
See Annex II for the Minutes (unapproved) of C57.147 WG S15 Meeting as Submitted
Annex G
Page 3 of 15
G.1.5.3 TF on Consolidation of Insulating Liquid (Fluid) Guides
Chair: Tom Prevost
The TF Report given at the Sub-Committee Meeting by Tom Prevost:
Quorum was achieved. Attendance included 63 guests, 12 requested membership on the TF. However, the Chair stated since the TF will make a transition to WG the application will apply for WG member status.
Dave Sundin, mentioned that it appears that two alternate insulating liquid Guides will expire prior to the formation of the Consolidation Guide. Dave asked, what action is recommended for their respective working groups? Tom Prevost responded, saying he will check with IEEE for SA rules. He stated the best case estimate to publish the consolidated guide by 2020. Jim Graham will also check with IEEE SA. Jerry Murphy stated one option is to just let them expire. Matt Ceglia of IEEE confirmed that the expiration dates is a hard stop of IEEE SA Active Status and the Guides, although would be classified as “inactive” would none-the-less be available for reference and purchase from IEEE. He added that once the Consolidated Guide is published, the other existing Guides would be superseded immediately. Patrick McShane stated that some brought up fact there is no IEEE existing synthetic ester maintenance guide, only an ASTM guide for new fluid is in works. Tom thinks the WG can coincidentally develop a synthetic maintenance guide while consolidating the existing guides.
Tom Prevost asked: “Are we ready to request PAR and to work on scope and purpose?” He then made a motion for SCIF to approve formation of WG for developing a consolidated guide for 5 insulating liquid standard guides. Clair Claiborne seconded. The motion passed.
See Annex III for the S16 Minutes (unapproved) of TF Consolidation of Insulating Liquid Guides as submitted.
Annex G
Page 4 of 15
G.1.5.4 TF on Particle Count Limits in Mineral Oil
Chair: Mark Scarborough, Secretary: Paul Boman
Mark Scarborough reported: The TF did not meet. What transpired since F15 included sending out a survey to approve the TF report that was written. 27 members, a majority, approved. Susan McNelly had many good editorial comments. The report has been submitted for approval. No consensus to use or not to consider particle count in insulating liquids is stated in the report.
Luis Cheim: Stated that the report seems to focus only on new transformers. Mark responded that was what was in the original purpose.
Motion was by Mark to present as the completed report. Jim Thompson seconded.
Tom Prevost asked; where is the report going to go? The response by Jerry Murphy was that there is now a placed for white papers on the web site. Susan McNelly indicated the section included tutorials and white papers now (including the SC Stds Insulating Liquids Terms white paper).
Motion carried unanimously to approve the report, and for posting. TF is closed..
G.2 New Business a. C57.12.00 - A comment was submitted during recirculation ballot, but was
deemed out of scope. It is not clear why? Matt Ceglia stated that during re-ballot process, a comment might be a non-modifiable part of the draft, aka “out of scope”. Since the comment pertains to insulating liquids, the advisement was submitted to the SCIF Chair. Per Jim Graham, the purpose is that if the SCIF considers the comment has merit, it can make a suggestion to the next revision of C57.12.00 WG to accept the comment. Jim suggested that the SCIF add this subject as an agenda item as old business for the F16 meeting.
b. Patrick McShane stated that it is his understanding that IEEE SA suggests that proper procedure for ballot resolution is for the BRC revised draft be approved by the WG Members prior to the recirculation vote. There has been some confusion on that policy in the past. That is the policy the WG will follow for PC57.147.
c. Under the S16 New Business Agenda, Don Platts was scheduled to give a 30 minute power point presentation on issues of negative tank pressure causing air entry during insulating liquid sampling procedures. Unfortunately, discussion of the other items of the meeting agenda ran long, and the power point presentation could not be made in the short remaining time. So Don provide the “5 minute elevator speech” instead. He stated that field testing procedure for transformers exists to determine if there is a positive tank pressure. However, there is a potential issue that the procedure itself can cause air to flow into the transformer. That problem can be eliminated using proper type of valves. Don advised he will be putting full presentation at the next ASTM D27 meeting.
Annex G
Page 5 of 15
G.3 Adjournment
The motion passed unanimously.
Respectively Submitted, Patrick McShane, Secretary SCIF
Annex G
Page 6 of 15
Unapproved Minutes from the S16 SCIF WG and TF Meetings
Annex I – WG C57.104 Minutes
IEEE Guide for the Interpretation of Gases Generated in Oil – Immersed
Transformers
Tuesday, March 22, 2016
Atlanta, Georgia, USA
Minutes of WG Meeting
The meeting was called to order at 4:45pm by Vice Chair Claude Beauchemin. Secretary Susan McNelly (writer of Minutes) was also present.
There were 50 of 77 members present. There were 53 guests, and 10 guests requesting membership. A membership quorum was achieved. The WG does plan to meet at the Fall 2015 Transformers Committee Meeting in Vancouver.
The following guests requesting membership were:
Marcos Ferreira Jeffrey Ray
Roger Hayes Justin Turner
Branimir Petosic Michel Veillette
John Pruente Deanna Woods
Jimmy Rasco Kwasi Yeboah
All of the above will be added as WG members.
Agenda
1. Attendance Roster Circulation
2. Member Roll Call & Quorum Check
3. Approval of the Fall, Memphis minutes
4. Presentation on Fault Identification Methods – Duval
5. Document Status
Annex G
Page 7 of 15
a. Determine number of methods to be referenced
b. Discuss expansion of Table 1 and Table 2
6. New Business
7. Adjournment
Introductions of the Vice Chair and Secretary were made. Attendees were asked to introduce themselves and indicate their affiliations when making comments or asking questions.
List of Meeting Attendees is provided below. Those identified in bold are WG Members in attendance.
A motion to approve the Fall 2015 Memphis Agenda was made by Don Platts and seconded by Tom Prevost. There were no objections or additions to the agenda. There was no opposition to approval of the minutes.
Annex G
Page 8 of 15
Presentation on Advantages and Limitations of Fault Identification Methods of DGA – Duval
A more detailed presentation by Michel is on the schedule for one of the Thursday main Tutorials.
Document Status – Review of Section 7
Claude indicated that several conference calls have been held to work on the text for the revised Guide. As the meeting approached, it was decided to first concentrate on one section at this meeting. Section 7 was sent to the WG for review prior to the meeting. Unfortunately, the Table in this section is the incorrect table and does not match the text. This will be corrected.
A decision regarding which method of presenting the data needs to be made. This decision will drive much of the rest of the work.
The PAR extension expires at the end of next year, which will require the process to be accelerated in order to meet the deadline. The objective is to have a draft out for review before the next meeting.
Annex G
Page 9 of 15
The introduction to Section 7 is on why DGA is done. The Guide will not direct how to physically deal with a transformer, it will provide information on when it is advisable to do a transformer assessment.
The section also includes a routine/periodic sampling procedure. This is not initiated by any specific action, but rather on a routine basis. The idea is to build a baseline DGA for each unit with a certain number of samples within a short period initially. A specific recommendation regarding the number of samples is not indicated.
Claude stepped through the proposed Figure 2.
Fredi Jakob indicated that the previous tables gave direction on the urgency of the situation based on the levels.
The proposed table for change levels does not treat all of the gases the same as was previously done with regard to the amount of change.
Another change is determining the condition of the transformer. DGA will not tell someone in of itself that a transformer is bad. The use of DGA Status rather than Conditions is proposed. DGA Status and TR Condition are not the same. A transformer assessment is never done on the result of a single sample. Astatistical sample will only indicate that a unit is out of the norm, not necessarily that there is something wrong with it.
Table 1 was presented (corrected version from what was sent out prior to the meeting). Corrected version will be sent out after the meeting. Two sets of values based on the ratio of Oxygen to Nitrogen were provided. Most of the time a lower ratio (<0.15) indicates a sealed system and a higher ratio (>0.15) indicates a breather type unit, but not always. For that reason, this terminology was not used.
A question was asked whether consideration was given to volume of oil and MVA rating. Claude indicated that will be one of the alternatives identified; however, the data that is available is not reliable with regards to this data.
Luiz Cheim indicated how much of the data included the age and what percentage was less than 69kV. After the meeting, it was noted that the values indicated in the meeting may not be correct and will need to be re-reviewed.
Alternate 1 Tables replaces the less than one year with a column for all results.
Alternative 2 keeps the “All” value and provides a range in place of the separate age columns.
Alternative 3 is similar to the original proposed tables with age breakouts, but also with MVA information. However, as previously mentioned, in the database, these two values are the most corrupt values.
A poll will be sent out to the WG with the alternatives presented and the corrected tables in the section 7 document.
There was considerable discussion on the data and assumptions that had to be made regarding the age and years of operation.
The meeting was adjourned at 6:00PM
Claude Beauchemin
Annex G
Page 10 of 15
WG Vice-Chair
Susan McNelly, WG Secretary
.
Annex G
Page 11 of 15
Unapproved Minutes from the S16 SCIF WG and TF meetings
Annex II – WG PC57.147 Minutes
Guide for Acceptance and Maintenance of Natural Ester Insulating Liquid in Transformers
March 21, 2016 ATLANTA, GA
Chair: Patrick McShane, Vice-Chair: Clair Claiborne, Secretary: Jim Graham
• Call to Order was made at 3:15 PM. • Introductions/Membership Attendance/Quorum Check
o 19 of 30 members present, quorum was achieved o 74 guests o Total attendance = 93 o 8 guests requested membership
• A motion to approve the agenda passed.
• A motion to approve the Fall 2015 meeting minutes was passed.
• Chair's Remarks, Patrick McShane:
o PC57.147 Draft 2.0 is currently in ballot. Balloting closes 31 March, 2016. The chair reminding the members to submit their votes before the closing date.
o As approved at the F15 meeting, a PAR REVISION was submitted to and approved by IEEE SA based on recommended changes to Title, Scope, and Purpose to reflect current recommended nomenclature for insulating liquids and reflect applications in large power transformers.
o The chair reminded the WG that the PAR expires end of 2016. It is anticipated the guide will be approved by the end of 2016 and an extension will not be necessary.
• Old Business
o None.
• New Business
o Some of the technical comments from the ballot were reviewed but no resolutions were voted on at the WG meeting.
o A ballot resolution group comprising Deanna Woods, Stephanie Denzer, Susan McNelly, Claude Beauchemin, David Hanson, and the working group officers was formed last fall. Dave Sundin, Larry Christodoulou, Don Doris, and Jeremiah Bradshaw were added to the ballot resolution group.
Annex G
Page 12 of 15
o James Graham, the standards coordinator, reminded the working group the ballot resolution group shall submit their comment resolutions to the working group for acceptance before recirculating the guide for approval.
• The meeting adjourned by acclimation at 3:30 pm.
Respectively submitted, Jim Graham, Secretary Post Minutes WG Chair Comment: The WG will meet at the F16 TC Meeting. Also it has been noted that the Initial Ballot Title did not reflect the revised PAR replacing the term “Fluids” with “Insulating Liquid.” This will be correct for the recirculation ballot. Respectively submitted, Patrick McShane, Chair
WG C57.147 Minutes Annex:
Time Line Goals - Key Milestones
• Finalize Key Issues Listing Done
• TF Final Reports Done
• WG Officers TF Compilation for Draft 1 Done
• 1st Straw Vote Draft 1.1 Done
• TFs Comment Review Draft 1.1 Done
• Draft 1.2 Straw Vote Done
• TFs Comment Review Draft 1.2 Done
• Draft 2.0 for WG approval Done
• Initiate SC Ballot Pool (IEEE SA) Done
• Ballot (IEEE SA) Done
• Ballot Resolution
• (BRG formed & complete task) Q2 2016
• Successful Vote! Q4 2016
• IEEE SA Approval and Publication Q1-2 2017
Annex G
Page 13 of 15
Unapproved Minutes from the S16 SCIF WG and TF meetings
Annex III – TF Insulating Liquids Guides Consolidation Minutes
Task Force on Consolidation of Insulating Liquid Guides Monday, March 21, 2016
9:30 – 10:45 AM
Capital Central Ballroom
Sheraton Hotel, Atlanta Georgia
The meeting was called to order at 9:35 am by Chair Tom Prevost.
There were 22 of 43 members present. There were 63 guests, and 12 guests requesting membership. A membership quorum was achieved. Guests attending the WG meeting for the first time who request membership or who have not attended 2 meetings in a row (including the present meeting, will be deferred until the next meeting attended.
Agenda
1) Introductions
2) Approval of agenda
3) Approval of November 2015 minutes
4) Review of current document status
a. C57.147 “Guide for Acceptance and Maintenance of Natural Ester Insulating Fluids in Transformers and Other Electrical Equipment”
i. In Revision process, PC57.147
ii. PAR opened 6-Feb-2012
iii. PAR Expiration 31-Dec-2016
iv. Ballot Status
Annex G
Page 14 of 15
5) Are we ready to form WG and submit PAR for Consolidated Insulating Liquid Guide?
a. Review of task force work
b. Task force recommendation
c. Scope and Purpose for PAR (if TF decides to move forward)
6) New Business
Due to the time constraints, attendees did not introduce themselves.
A motion to approve the Fall 2015 Agenda was made by Dave Sundin and seconded by Clair Claiborne. There were no objections to the approval of the Agenda.
Next, a motion was made by Clair Claiborne and seconded by Claude Beauchemin to approve the Fall 2015 Memphis meeting minutes. There were no objections to approval of the minutes.
Chair’s Remarks and Discussion:
As a review of current document status:
-Patrick McShane announced that PC57.147 is on track to be approved this year.
- Jimmy Rasco updated the Task Force that ASTM will discuss a path forward at their next
meeting on how to distinguish the difference between new and re-refined oil. Currently the
Scope of D3487 excludes re-refined oil.
Now that remaining guide will be finalized (PC57.147), the question was posed as to whether the Task Force should move forward to develop a Consolidated Insulating Liquid Guide for the five fluids: Mineral Oil, High Molecular Weight Hydrocarbon, Natural Esters, Silicone fluid and Synthetic Esters. A motion was made by Dave Sundin and seconded by Rich Simonelli to develop the guide. It was unanimously approved by the members with no abstentions.
The next step for the Task Force is to develop a scope and purpose for the guide.
No New Business was discussed and the meeting was adjourned at 10:45 am.
Annex G
Page 15 of 15
Page 1 of 9
Insulation Life Subcommittee
March 23, 2016 Atlanta, Georgia
Chair: Sheldon Kennedy Vice-Chair: Barry Beaster Secretary: Sam Sharpless
The Insulation Life Subcommittee met in Atlanta, Georgia on March 23, 2016 at 8:00 AM. Due to the size of the group, general introductions were not made. The chair requested that each person state their name and affiliation when addressing the subcommittee.
A hand count of the members at the beginning of the meeting revealed that 62 of 106 members were present. A quorum was declared.
The minutes for November 2015 Insulation Life Subcommittee meeting in Memphis Tennessee were presented. A motion to approve the minutes was made by Phil McClure and seconded by John John. Approval was unanimous.
The chair presented the proposed agenda for the meeting. A motion to approve the minutes was made by Tom Prevost and seconded by Bruce Forsyth. The minutes were unanimously approved without discussion.
A hand count of the attendance rosters after the meeting indicated a total attendances of 222 people, including 73 members. 14 guests requested membership. The complete attendance will be recorded in AMS.
H.1 Chair’s Report
The Chair, Sheldon Kennedy, welcomed everyone to the meeting. He stated that the next meeting of the committee will occur during the 2016 Fall meeting in Vancouver, British Columbia, Canada, October 23-27, 2016. The final date and location of the Spring 2017 meeting has not been finalized. Those present were directed to the committee website for details as they become available.
The Chair reviewed the scope of the Insulation Life Subcommittee. A motion was made by Sanjib Som to change section “a” of the scope, replacing “…safe insulation temperatures…” with “…recommended insulation temperatures…”. This change was seconded by Gary Hoffman. The motion carried unanimously.
The Chair thanked activity leaders for leading effective meetings and keeping activity documents up to date. He noted that the minutes for working groups should include the name of the activity, the date and time of the meeting, the number of members and guest present, the presence or absence of a quorum, a summary of the discussion, a record of the decisions made in the meeting, and the date/time/place of the next meeting. He requested that the minutes be submitted as soon as possible and no later than 30 days after the date of this meeting.
The chair reminded everyone that working groups need a 2/3 majority to submit a document for Sponsor Ballot. The subcommittee needs a simple majority to submit a document for Sponsor Ballot.
Annex H
Page 2 of 9
The following new members were welcomed and recognized; Michael Barnes, Josh Herz, Arvin Joshi, Sheldon Kennedy, Kenneth McNeish, Dhiru Patel, Álvaro Portillo, Eduardo Robles, Zoilo Roldan, Mathieu Sauzay, Jose Valencia, and Waldemar Ziomek.
The following members were moved to guest status; John Crouse, Van Nhi Nguyen, Michael Botti, Martin Hinow, and David Wood. Don Duckett was removed from the rolls at his request.
H.1.1 Project Status Reports
C57.91 IEEE Guide for Loading Mineral-Oil-Immersed Transformers
C57.91 is valid until 2021.
C57.100 IEEE Standard Test Procedure for Thermal Evaluation of Liquid-Immersed Distribution Transformers
C57.100 is valid until 2021.
C57.119 IEEE Recommended Practice for Performing Temperature Rise Tests on Oil-Immersed Power Transformers at Loads Beyond Nameplate Ratings
C57.119 is valid until 2018.
C57.154 Design, Testing and Application of Liquid-Immersed Transformers with High-Temperature Insulation
C57.154 is valid until 2022.
C57.162 - Guide for the Interpretation of Moisture Related Parameters in Dry, Gas Insulated and Liquid Immersed Transformers and Reactors
The C57.162 PAR expires December 31, 2017. The standard is valid until 2018.
1276 Guide for the Application of High Temperature Insulation Materials in Liquid-Immersed Power Transformers
The 1276 PAR expires December 31, 2016. The standard is valid until 2018.
1538 IEEE Guide for Determination of Maximum Winding Temperature Rise in Liquid-Filled Transformer
1538 is valid until 2021. The amendment was approved in September 2015.
Annex H
Page 3 of 9
H.1.2 Working Group and Task Force Reports
Working Group on PC57.162 - Guide for the Interpretation of Moisture Related Parameters in Dry, Gas Insulated and Liquid Immersed Transformers and Reactors – Tom Prevost
A meeting was held on March 21, 2016 for WG PC 57.162 Guide for the Interpretation of Moisture Related Parameters in Dry, Gas Insulated and Liquid Immersed Transformers and Reactors. (Moisture in insulation systems) Attendance Members 54 out of 86 Guests 84 Guests Requesting Membership 15 Meeting Minutes Tom Prevost, chair, introduced himself and in the interest of saving time members and guests introduction was skipped. A quorum of the working group members were present 54 out of 86. The first meeting minutes approved with Sam Sharpless making a motion and Claude Beauchemin seconding the motion. Tom Prevost also mentioned he sent out the agenda for the meeting today. Deanna Woods asked Tom Prevost to mention the criteria for membership to the group. Tom Prevost went over the Scope and Purpose of the working group. Timeline, we are using up our 4 years allotted very quickly therefore the WG is close to deadline. Tom also mentioned that extensions for PARs are becoming difficult to obtain for the WG. So we need to get things moving along. We will be circulating out the compiled documents in the next couple of months. Some Task Forces have made great progress and after the updates today we will know which task forces need to do more work. Task Force 1 - Terminology and Definitions Task Force Leader - Jeff Golarz [email protected] This section will list and define the terminology for moisture related phenomena in solid, liquid and gaseous insulating materials used in transformers and reactors. Tom Prevost asked Jeff Golarz to come forward and discuss his task force and go over the scope. Jeff sent out to TF leader and received 2 responses to date. There are 50 to 55 terms to date. Task Force 2 - Measurement and evaluation of moisture-in-gas insulation parameters Task Force Leader – Tom Melle [email protected] This section describes existing measurement, evaluation and methods of moisture and other relevant parameters in a gaseous medium. Tom is looking for scientific people to help and
someone with field experience with dew point and moisture and finally someone with historical research. Tom Melle gave a review of where the Task Force stands and is having a meeting for the Task Force on Tuesday. Tom had Oleg Roman give a short presentation on dew point. Task Force 3 - Measurement and evaluation of moisture-in-liquid insulation parameters Task Force Leader - Claude Beauchemin [email protected] This section describes the existing measurement and evaluation methods of moisture parameters and other relevant parameters in the liquid medium of a transformer or reactor for sequential or continuous on-line moisture assessments. • -Karl Fisher Methodology • -Consider effect of chemical solutions used for new aged and contaminated insulating liquids • -Consider types of insulating liquid • -Relative Saturation • -Consider measurement method • -Capacitive probe • -Derived from Karl Fisher • -Effect of aging (contamination) on water solubility Claude reported that there was not much change from the last meeting. Claude did not endorse Karl Fisher for getting relative saturation. Task Force 4 - Measurement of moisture in solid insulation Task Force Leader - Paul Griffin [email protected] / Ron Hernandez is taking lead Ron went over the purpose that describes the methods of measurement of moisture in solid insulation using a balance, for un-oiled insulation and a Karl Fisher method using solvent extraction or vapor extraction for oiled insulation. Ron stated that they had a motion to change the scope and it was declined and left as is. Task Force 5 - Estimation of moisture in solid insulation Task Force Leader - George Frimpong [email protected] The TF has changed the name to estimation of moisture in solid insulation. The TF is done with their section and waiting for comments. Task Force 6 - Inferring of moisture in solid insulation from measurements conducted in liquid or gaseous medium Task Force Leader - Valery Davydov [email protected] This section describes methods of inferring moisture in solid insulation from that measured in the liquid or gaseous medium for both sequential and continuous on-line measurements. A presentation was sent to Tom Prevost and presented by Tom after everyone else has presented. Task Force 7 - Evaluation of aging and end of life of solid insulation parameters Task Force Leader- Roger Wicks [email protected]
This section describes approaches for evaluation of parameters of end of life of solid insulation affected by moisture. The consideration of the effects of moisture, oxygen and aging byproducts in transformer aging tests is the purpose of this task force. Clarification the focus is aging in liquid not gas or dry. TF will focus on liquids. Task Force 8 - Factory/workshop application of knowledge on moisture; establishing baselines Task Force Leader - Poorvi Patel [email protected] This section describes a factory/workshop approach to the establishment of a baseline for each important moisture related parameter. Poorvi Patel reported that they have completed the work. Task Force 9 - Field application of knowledge on moisture Task Force Leader - Jim Thompson [email protected] This section lists the risks associated with moisture Jim has next step to get comments on the survey spreadsheet and has yet to have final outcome returned. Survey deals with the effect of moisture does to a transformer and sample data. Task Force 10 - Table of contents pertaining to moisture migration and moisture distribution Task Force Leader – Bruce Forsyth [email protected] Bruce is still looking for members. He got one person. Tom Prevost presented Valery Davydov’s presentation relative to Task Force 6’s work. Meeting adjourned.
Working Group for Application of High-Temperature Materials IEEE P-1276 – Roger Wicks
Sheraton Atlanta Hotel – Atlanta, Georgia USA Room – Capital Center March 22, 2016, 3:15 - 4:30pm
Roger Wicks – Chair Mike Franchek – Vice Chair Javier Arteaga - Secretary
A. Welcome & Chairman's Remarks R. Wicks
Roger opened the meeting at 3:15pm with a brief description of the scope of the Working Group.
16 members were in attendance meeting the quorum requirement of 16 members. From the rosters at the end of the meeting there were 18 members in attendance and 73 guests. Of these 55 guests, 11 requested membership. The attendance will be reviewed and new members will be added if they meet current attendance requirements. The attendance will be recorded in the AMS system. The automated attendance records (scanning system) recorded 17 members and 55 guests. Number of members in system (for quorum purposes of 31) differed from our printed roster (of 30 members).
D. Approval of Fall 2015 Meeting Minutes – Memphis, TN J. Arteaga
David Sundin made a motion to approve the minutes as written, John Luksich seconded it and these were unanimously approved without changes.
E. Approval of Meeting Agenda R. Wicks
The agenda was approved unanimously without changes.
F. Review of IEEE 1276 D1.3 All
Aleksandr Levin requested clarification of the need for more details on section 5.5, aging test procedure for hybrid high-temperature insulation-system qualification, indicating that the already provided details in standard C57.100 are sufficient and we only need to make reference to this standard.
John Luksich also indicated that he is satisfied with the content of C57.100 as related to section 5.5 and there is no need to duplicate the information. David Sundin also agreed with John’s statements.
The Chair agreed with these comments, but pointed out that section 6, insulating materials, needs more information regarding ageing of enamels in conductors. Rick Marek indicated that for enamel, all test data available is at room temperature and in air and there is a need to describe its thermal qualification at higher temperatures and in the fluids considered, being a first step the determination of the thermal evaluation qualifiers.
Chair also mentioned that the section for insulating fluids is missing a test method to determine the thermal capability of these. Rick Marek commented that the fluids table in standard C57.154 contains information about various fluids, with reference values based only on consensus data, without the existence of formal qualification of their properties and he does not favor to repeat this table in our document. He suggested the need to add an Annex to describe the thermal qualification of the fluids.
Aleksandr Levin requested to reference standard C57.100 as much as possible, adding only new information to our document. New components added to this standard will have their description and the description of their applicability for use at higher temperatures.
John Luksich presented his contribution for Annex C, loading guide for natural esters. This annex provides a guide similar to standard C57.91, but referred to thermally upgraded cellulose insulation in natural ester fluids. The life curve is based on 130°C and 180,000 h for loss of life with data points generated by tests. Additional curves could plotted for other temperatures
Annex H
Page 7 of 9
following the same slope when the same insulation materials are used. However, if different insulating materials are used is very possible that the slope of the curve maybe different. Therefore its applicability is only for the materials used in the tests.
Joe Foldi indicated that in order to use this new curve it is necessary to determine the hot spot of the winding and the methods available in C57.91 are based in mineral oil. He indicated that with testing following the guidelines of standard C57.119 it would be possible to determine the exponents “m” and “n” applicable to natural ester fluids.
Chair requested manufacturers to provide these values if they are available. He also commented that in many cases the new insulation systems covered in the scope of this document are using temperatures well above standard, so knowledge of these exponents and the effects on hottest spot (and hence life prediction) would be critical.
Rainer Frotscher requested also that have data for other insulating materials like aramid paper or others. Chair mentioned that he has made tests with aramid paper at 240°C, but after 2 years he was still unable to generate the thermal curve for this materials per C57.100 (as the material was essentially unaffected). John Luksich commented that with cellulose insulation, the life of the transformers is based on the cellulose properties, but with aramid paper the life of the transformer is more dependent of the fluid used.
Chair will send by e-mail the draft to working members and volunteers who are still listed as guests, but because of file size will upload the draft to our website (may need to work with Sue to develop a site). The file is too large to go out via the AMS system. Guests can access this on Transformers Committee website.
The PAR of this standard expires at the end of this year and it may be required to have a draft circulated at least within the working group, members and guests, in order to be able to request an extension. The standard expires at the end of 2018.
The assignments for the elaboration of the draft are as follows; Section 5 – Insulation-system temperature ratings, test procedures, and material aging
qualification: Chair - Roger Wicks Volunteers – Mike Franchek, Ken McNeish, Tom Golner, David Stankes,
Solomon Chiang, Joshua Verdell, Dave Sundin, Jinesh Malde, and Mohamed Diaby.
Section 6 – Insulating Materials.
Chair – Javier Arteaga Volunteers – Clair Claiborne, Julio Caldeira, Patrick McShane, Dave Sundin,
Attila Gyore, Chuck Stevens, Shane Goydich, Jinesh Malde, Dustin Davis, and Mike Shannon.
Section 7 – Description of high-temperature transformers.
Chair – Mike Franchek Volunteers – Kurt Kaineder, Arup Chakraborty and Evan Langran.
Section 8 – Loading guidelines for high-temperature transformers. Chair – John Luksich Volunteers - Arup Chakraborty and Jinesh Malde
Annex H
Page 8 of 9
Section 10 – Heat run test and average winding temperature.
Chair – Juan Castellanos Volunteers – Mike Franchek
The Chairman indicated that the working group will meet again in the Fall 2016 meeting.
No further discussion, so with this, John Luksich moved to adjourn, seconded by Kurt Kaineder. Meeting adjourned at 4:11 PM.
Working Group on C57-119 IEEE Recommended Practice for Performing Temperature Rise Tests on Oil-Immersed Power Transformers at Loads Beyond Nameplate Ratings – Gael Kennedy
The document is undergoing ballot resolution. It is still on track to be completed prior to the end of 2018. This working group did not meet during the Atlanta Conference.
Submitted by: Gael R Kennedy
H.2 Old Business
Gary Hoffman presented the findings of the study group formed to “establish a title, scope, and purpose for the proposed guide for temperature measurement”.
• Proposed Title - “IEEE Guide for Transformer Temperature Measurement”
• Proposed Scope - “This guide discusses and recommends methods of temperature
measurements for liquid immersed transformers and reactors. Thermal well types as well as sensors for both indirect and direct temperature measurement are included. Temperature measurement applications including liquid, winding, LTC, other parts and ambient temperatures on transformers, reactors and accessories attached to the transformer or reactor are discussed.”
• Proposed Purpose – “This guide discusses and recommends methods of temperature measurements for liquid immersed transformers and reactors. Thermal well types as well as sensors for both indirect and direct temperature measurement are included. Temperature measurement applications including liquid, winding, LTC, other parts and ambient temperatures on transformers, reactors and accessories attached to the transformer or reactor are discussed.”
There was a question as to whether the guide could also cover dry-type transformers and this issue was discussed at length. There was also discussion as to whether this information should be included as a part of another existing standard or guide.
A motion was made by Jeff Golarz to publish the task force’s report, and this motion was seconded by Don Platts. The motion carried 62 yeas to one nay and one abstention.
A motion was made by Gary Hoffman to approve the Title, Scope, Purpose (as proposed) and submit a PAR to the Standards Association Standards Board for approval of a new project. The motion was seconded by Bruce Forsyth. Phil McClure made a friendly amendment to the motion
Annex H
Page 9 of 9
for the title to be “IEEE Guide for Liquid Immersed Transformer Temperature Measurement”. A vote was taken and the motion carried with 57 yeas, 2 nays, and 5 abstentions.
A question was raised about applicability of the new guide to reactors as well as transformers. After much discussion, there was ultimately a proposal to amend the title to be “IEEE Guide for Temperature Measurements for Liquid Immersed Transformers and Reactors” and the scope to read “This guide discusses and recommends methods of temperature measurements for liquid immersed transformers and reactors. Thermal well types as well as sensors for both indirect and direct temperature measurement are included. Temperature measurement applications including liquid, winding, LTC, other parts and ambient temperatures on transformers, reactors and accessories attached to the transformer or reactor are discussed.” Gary Hoffman made a motion to accept these changes and it was seconded by Phil McClure. The motion was carried with 46 yeas, one nay, and one abstention.
Phil McClure agreed to be the chair for the new guide and was so appointed by the Chair.
H.3 New Business The chair asked for volunteers address ballot comments for C57.12.00 by Mark Perkins wherein clause 4.3.1 makes reference to C57.91. Bruce Forsyth and Gary Hoffman were appointed to study the situation and provide a response.
H.4 Adjournment Bruce Forsyth made a motion to adjourn. Gary Hoffman seconded this motion. The meeting was adjourned.
Respectfully submitted,
Samuel L. Sharpless Secretary, Insulation Life Subcommittee
Annex J Performance Characteristics Subcommittee
March 23, 2016 Atlanta, Georgia
Chair: Ed teNyenhuis Vice Chair: Craig Stiegemeier Secretary: Sanjib Som
J.1 Introduction / Attendance
The Performance Characteristics Subcommittee (PCS) met on Wednesday, March 23rd, 2016 at 3pm with 152 people attending. Of these, 62 were members and 90 were guests. Prior to this meeting, the total membership of PCS was 81 members; therefore, quorum was achieved with 76% of the membership in attendance.
There were 20 guests requesting membership of which 13 have attended three of the past 5 meetings or two immediately preceding meetings.
Further, due to a lack of required participation in the subcommittee, 7 of the current members will be removed prior to the Fall 2016 meeting. Also, 190 of the 428 people on the roster will be removed as they have not attended any of the past 5 meetings. All of these changes will be made through the AMS system.
The Vice-Chair distributed rosters for the seating arrangement in the room.
J.2 Chairman’s Remarks
The Chair provided updates on the status of standards under PCS.
PCS is again sponsoring a technical presentation on Thursday 24th March 2016 with the topic being “Review of IEEE C57.159 - Guide of Transformers for Application in Distributed Photovoltaic (DPV) Power Generation Systems by Dr. Hemchandra Shertukde, Mr. Sheldon Kennedy and Mr. Carlos Gaytan”.
The Chair congratulated Sheldon Kennedy on being awarded fellow of IEEE. He was cited for his contribution towards Rectifier Transformer standards work.
J.3 Approval of Agenda
The Chair presented the agenda. A motion to accept as proposed was given by Dan Sauer and seconded by Ken Skinner. The chair requested comments or objections - there were none. The agenda had been earlier sent to the members by email several weeks prior to the meeting
J.4 Approval of Last Meeting Minutes
The chairman presented the minutes of the last meeting held in Memphis, Tennessee – October, 2015. A motion to accept as proposed was given by Ken Skinner and seconded by Dan Sauer. The acceptance of the minutes was passed by unanimous vote.
Annex J
Page 2 of 28
J.5 Minutes from Working Groups and Task Force
The following WG and Task Force reports were received next (the reports are below): • WG on Tertiary/Stabilization Windings PC57.158 E. Betancourt • WG on PCS Revisions to Test Code C57.12.90 M. Perkins • WG on C57.109 - Through-Fault-Current Duration V. Mehrotra • TF on Audible Sound Revision to Clause 13 of C57.12.90 B. Beaster for R. Girgis • WG on Non-sinusoidal Load Currents C57.110 R. Marek • WG on PCS Revisions to C57.12.00 T. Ansari • WG Shunt Reactors C57.21 S. Som • IEEE/IEC WG Wind Turbine Generator Transformers, P60076-1 P. Hopkinson for D.
Buckmaster • WG on C57.18.10 S. Kennedy • Loss Evaluation C57.120 R. Verdolin • WG 3-ph Transf. Connections C57.105 A. Bromley • WG on Distributed Photo-Voltaic Grid Transformers C57.159 H. Shertukde • TF on HV & EHV Transients C57.142 J. McBride • TF Short Circuit Criteria S. Patel
J.6 Unfinished (Old) Business
None
J.7 New Business
Enrique Betancourt requested a motion for PCS to approve Draft C57.158 for balloting. The WG had already approved the Draft for balloting. The motion was proposed by Dan Sauer and seconded by Marnie Roussell. The motion passed with overwhelming majority by show of hands.
The Chair requested a motion for PCS to approve Draft C57.120 for balloting. The WG had already approved the Draft for balloting. The motion was proposed by R. Verdolin and seconded by Wally Binder. The motion passed with overwhelming majority by show of hands. During the report on WG on PCS Revisions to C57.12.00 by T. Ansari – Amitabh Sarkar opined that for windfarm transformers, that this could be part of the rectifier transformer. He will discuss further with T. Ansari.
The TF on HV & EHV Transients C57.142 chaired by Jim McBride is nearing completion. The TF approved a motion that the C57.142 scope be expanded to include HV and EHV transients. Based on this the TF will begin a PAR revision for C57.142 to expand the scope to include HV and EHV transients. The PCS Chair also stated that he will request Jim McBride to be the chair of this C57.142 standard revision WG.
The Chair then requested a discussion on the TF Short Circuit Criteria report submitted by Sanjay Patel. This TF approved a motion that IEEE should develop its own guide for short circuit design criteria. It was recognized that IEC has a short circuit guide whereas IEEE has no such guide. During the discussion, the following comments were made:
Annex J
Page 3 of 28
• Wally Binder: Since many transformers have failed, specifications have been strengthened year after year by purchasers. However there has been no testing. He thought the right questions were not being asked and felt that there is need for something.
• Steve Antosz: He felt that there is a need for something similar to IEC, there should be a short circuit review criteria. He opined that IEC document could be a possible starting point.
• Dan Sauer: He stated that the short circuit criteria should not impose restriction on manufacturers. He has successfully short circuit tested his company’s products in North America, South America and China. He would hate to see criteria that would invalidate his test results.
• Javier Areatga: He wanted the requirements for short circuit review to be very clear. He expressed his availability to be vice-chair.
• Dan Sauer: He referred to Waters book on short circuit.
• Sanjib Som: He stated that hand calculation is okay for simple designs but finite element analysis is required for other types.
A motion for PCS to create a task force to prepare a PAR for short circuit was proposed by Sanjib Som and seconded by Bill Boedkar. There was overwhelming support with two abstentions and two opposing (Dan Sauer and Craig Colopoly).
Adjournment was proposed by Ken Skinner and seconded by Dan Sauer.
The meeting was adjourned at 4.15 pm.
Annex J
Page 4 of 28
J.8 Minutes of Meetings of Working Group (WG) and Task Force (TF) Reports (all unapproved)
WG on Tertiary/Stabilization Windings PC57.158 E. Betancourt
PCS Working Group on Guide for Application of Tertiary and Stabilizing Windings PC57.158
Performance Characteristics Subcommittee IEEE / PES Transformers Committee
March 21, 2016 9:30 AM
The Sheraton Atlanta Hotel, Capital South Ballroom Atlanta, Georgia, USA
UNAPPROVED MINUTES
The WG C57.158 met at 9:30 AM on March 21, 2016. 20 Members out of 28 were present so we had a quorum to conduct regular business. 76 Guests were also present and six of them requested membership. Hamid Abdelkamel Ameren Hamid Sharifnia HDR Hugo Flores CG Power Systems
Markus Schiessl SGB Trafo Victor Garcia Siemens Waldemar Ziomek PTI Manitoba Inc. The Agenda was approved with no comments or amendments.
A motion for approval of the Memphis WG meeting minutes was made by Hemchandra Shertukde, seconded by Sukhdev Walia and approved.
The Draft Guide was approved by the WG by a 2/3 majority by email vote on Jan 26, 2016.
A. Old Business
The Chair discussed the present status of Draft 5 rev. B of the Guide and the timing for submitting the draft for ballot and comment resolution. A PAR extension will not be required if the Guide can be submitted by October 17 of this year.
The draft distributed to the WG for comments received only editorial comments and had an 86% approval.
A motion to allow the WG members to conduct the comment resolution by email was made by H. Shertukde, seconded by D. Walia and passed unanimously.
The Chair proceeded to review the changes to the document and diagrams of Draft 5 rev. B with the WG.
The most significant items discussed centered on reformatting the Guide to comply with the required template and obtaining consent or recreating diagrams with copyrights.
H. Shertukde commented that the terminal markings on some of the diagrams need to be per ANSI (IEEE) not IEC.
The Chair explained how the section on “Short Answers to Frequently Asked Questions” was moved to an Annex in the Guide, as recommended by some WG members.
Annex J
Page 5 of 28
B. New Business
No new business was presented before the WG.
Question was raised as to when this document will go to ballot – Chair referenced previously timeline for submission of this Guide; the document would need to go out for ballot by the beginning of May of this year. Given the case, the Chair will apply for a PAR Extension, with the consent of the Group Members.
Question was raised on whether this document will change any of the present test requirements listed in other IEEE Standards – Chair did not foresee any changes to present testing requirements as this Guide is focused on application of stabilizing windings and provides recommendations about verification by calculation.
Motion to adjourn WG meeting was made by Mike Spurlock and seconded by Dough McCullough.
Meeting was adjourned at 10:30 am.
Respectfully submitted, Enrique Betancourt Brian Penny WG Chair Vice Chair and Acting Secretary
Working Group on PCS Revisions to C57.12.90 - Mark Perkins
Meeting Minutes
Working Group on PCS Revisions to C57.12.90
March 21, 2016, 11:00am-12:15pm
Capital North, Sheraton Atlanta
Mark Perkins, Chairman; Craig Stiegemeier, Secretary
1. Introduction of members and guests
• Mark Perkins presided over the meeting as Chair. Craig Stiegemeier was secretary. Attendance rosters were circulated for those in attendance to record their presence and confirm their membership or guest status.
2. Attendance
• A review of the adjusted membership was conducted and 32 of the 54 WG members were in attendance. This resulted in attendance of 59% of the membership, making this meeting “official” as a quorum was reached. In addition, 64 guests were present and 23 of those guests requested membership. Of those 23, 12 meet the requirement of participating in the WG and have either attended the previous 2 meetings or 3 of the past 5 WG meetings. They will be on the roster for the Fall meeting, and 11 of the current members will be removed due to a lack of participation.
3. Agenda approval • Dan Sauer made a motion to approve the agenda and Kenneth Skinger seconded the motion.
All approved the agenda. Later in the meeting, a correction was made noting that the spring meeting was held in San Antonio.
Annex J
Page 6 of 28
4. Minutes of the Fall 2016 meeting
• A review of the Fall 2015 Memphis minutes was conducted by the chair. Dan Sauer made a motion, and it was seconded by Kenneth Skinger to approve the spring minutes as written. Minutes were approved by the membership unanimously.
5. Old Business
• A survey was conducted with the recommendation of changes to standard C57.12.90 section 9.3.1. The survey was sent to the all members and guests of the WG and Performance Characteristics Subcommittee. These recommended changes will be included on the next ballot of C57.12.90.
6. New Business
• Load Tap Changer Performance Test Procedure for C57.12.90 o At the Memphis meeting, the chair of the working group on PCS revisions to
C57.12.00 discussed the need for including a performance test on load tap changers as part of C57.12.90 and indicated that this had been surveyed in his working group. It was determined that this should be covered in detail at the Spring 2016 meeting in Atlanta.
o The scope of the WG is to determine if a test is to be performed and if necessary, the procedure for performing this test.
o Joe Foldi suggested that historical information be reviewed. A task force of the WG of PCS revisions to C57.12.00 some time ago reviewed this topic, and the information covered by the TF should contain good information that would support this effort. Rainer Frotscher from Reinhausen offered to make a presentation covering background previously covered. Steve Antosz made a motion and Terry Martin seconded that Reiner make that presentation at this meeting. This was unanimously approved.
o Rainer Frotscher made a presentation. The main challenge is that there is no test in C57.12.00 for a performance test requirement after the LTC is installed and the transformer is complete, ready for other testing.
o There was a discussion that a polarity test should be performed on reactance type tap changers. This should be done after the unit is fully assembled and before voltage is applied to the transformer.
o A slow transition test was discussed. This test is common from some manufacturers, as it is referred to by unique names.
o There may be a need for a test with 85% voltage on the motor drive. o Sanjay Patel of SMIT suggested that when there are 3 single phase LTC’s, there
should be some sort of time delay test to make sure all LTC’s are operating simultaneously.
o The Chair suggested that a review of each specific type of performance test be conducted, including the process of performing the tests. Test with voltage induced at the power freq.
1. Voltage requirement (freq., voltage) 2. Voltage induced on LV winding or HV winding 3. Number of steps required
a) end to end twice b) Both directions through neutral for reversing sw.
4. Pass/Fail Criteria a) Tripping (may trip an electronic power supply) b) Monitor current and/or power?
Annex J
Page 7 of 28
c) Sound? d) DGA?
o Pierre Riffon noted that this test is well documented in IEC 76.1. o CG Power systems noted that a lower voltage should be allowed for
the test due to problems with electronic power supplies. o Sanjay Patel suggested that the test must be performed at 100%
voltage. Pierre supported keeping the voltage near to the rated voltage.
o Rainer said 80% voltage may be okay, but 10% would be a problem. Mark suggested that the voltage be 90% or higher.
o Javier Arteaga noted that some voltage variation must be allowed. o Mark Perkins suggested that following the IEC standard would be
best. o Ajith Varghese from SPX suggested that there should be a voltage
test from end to end, with 80% voltage. The IEC standard typically applies to transformers with the LTC in the HV.
o Mark called for all to agree for end to end to end as being acceptable. Ajith made and Dan Sauer seconded this approach, with unanimous agreement. Each tap change must be covered, from both direction. It could start from the neutral point or an end point.
o The voltage requirement of having at least 80% may be required due to transformers that have variable flux during LTC operation. Hakim Shamaun suggested that changing the voltage at each position is impractical. Dan Sauer suggested that the test sequence be performed at least at 95%. Chris Schalt from ComEd suggested that the LTC be tested at operating voltage. Hakim Shamaun suggested that a lot of these problems come about due to limitations of the electronic power supply. Joe Foldi suggested that 90% be used, since at no load the transformer can operate up to 100%. Mark re-focused the group into an operating target at 100% of voltage. The test should be performed at 100% voltage when possible. Setting a lower limit of 95% - 3 were opposed. 1 person thinks it should be lower than 90%.
o Dan Sauer made a motion that we set a voltage requirement of rated voltage, but not less than 95% due to test equipment limitations at rated frequency. Kenneth Skinger seconded the motion. Discussion occurred that there’s a need to identify the specific voltage being discussed. The vote on the motion was 14 in favor, 3 opposed
o There was not time to review all of the following: Test with current at load loss connection Test of motor drive without voltage on transformer Low voltage test to verify proper connections and polarity Test of limit switches or other protective devices Test of hand crank operation DGA limits or other pass/fail criteria after testing
• Other new business was called for, and none was offered. 7. Adjournment
Dan Sauer motioned and Kenneth Skinger seconded that we adjourn. The motion was accepted unanimously, and the meeting was adjourned at 12:18 pm.
Annex J
Page 8 of 28
Working Group for Revision of C57.109
Working Group for Revision of C57.109 IEEE Guide for Liquid-Immersed Transformer Through–Fault-Current Duration
Atlanta, GA, March, 21 2016 The meeting was held on Monday March 21, at 1.45 pm. Six of the ten members were present at the meeting so a quorum was achieved. There were a total of 37 people present which consisted of 6 members and 31 guests. Three guests requested membership and were added to the membership. A motion was raised by Weijun Li to approve the Atlanta Meeting Agenda. Bill Griesacker seconded the motion. The working group unanimously approved the Atlanta Meeting Agenda. A motion was raised by Weijun Li to approve the San Antonio Meeting Minutes. Bill Griesacker seconded the motion. The working group unanimously approved the San Antonio Meeting Minutes. A motion was raised by Weijun Li to approve the Memphis Meeting Minutes. Bill Griesacker seconded the motion. The working group unanimously approved the Memphis Meeting Minutes. The Working Group reviewed the request that was presented to the Chair (Tauhid Ansari) of the WG PCS Revisions to C57.12.00. Mr. Tauhid Ansari informed the WG that the request was on the agenda for discussion for their Atlanta WG meeting. There was no further discussion on this topic. The working group chair reviewed the minutes from the January 12 Memphis meeting of the task force (KTF20) of the Power System relaying Committee K. In addition to the comments received from an active group working on C37.91 which were addressed in the previous two meetings clarification was sought for one significant issue of interpretation of the impedance to use for calculation of through-fault current for Class IV transformers. The maximum short circuit is limited by the system impedance plus transformer inherent impedance, but the graph in the C57.109 guide seems to neglect system impedance, implying that only transformer inherent impedance is to be used. This comment will be addressed during the revision of the guide by adding a note to the graph regarding impedance used. The vice-chair, Hemchandra Shertukde, reviewed the Scope and Purpose of the PAR for the WG with an emphasis that the guide is to focus on over-current devices applied to limit the exposure time of transformers to short-circuit currents. Also that the focus is on establishing a guide to help coordinate these devices to relate fault duration and magnitude to withstand capability. The secretary, Jason Varnell, presented a topic for discussion relating to an alternate method to establish the damage curves by using an iterative method to determine the duration required to reach the winding short circuit temperature limits as specified in C57.12.00 section 7. This method uses the winding temperature calculation from C57.12.00 section 7.4. Javier Artega commented that this calculation was too complex with too many variables for the use of this guide and that it is best suited to keep the damage curves. There was no further discussion. The Chair then requested for additional volunteers to assist in revising the guide. Weijun Li and Branimir Petosic agreed to provide assistance in revising the guide. A motion was raised by Weijun Li to adjourn. Bill Griesacker seconded the motion. The working group unanimously approved the adjournment. The meeting adjourned at 2.20pm. The Working Group will meet at the next meeting in Vancouver.
Annex J
Page 9 of 28
Respectfully submitted Vinay Mehrotra WG Chair
TF on Audible Sound Revision to Clause 13 of C57.12.90 - R. Girgis
Unofficial Minutes of Spring 2016 Meeting of TF “Audible Sound Revision to Test Code C57.12.90”, in Atlanta, GA
The TF met at 1:45 PM, on Monday, March 21, 2016. Chairman Dr. Ramsis Girgis presided over the meeting. Secretary Barry Beaster assisted with the administrative duties.
After the Fall meeting, the membership had been adjusted to 52 members. For meeting preparation, a meeting agenda along with the unapproved Fall 2015 minutes were circulated to all members and guests of the last meeting. A copy of the prior meeting attendance for the past five years was circulated to the members for any possible oversight in recording attendance.
The meeting was attended by 26 of the 52 members and 43 guests for a total of 69 persons. A quorum was established at the end of the meeting. There were no requested agenda changes. The Fall 2015 meeting minutes had no requested changes or corrections. Since a quorum was achieved at the end of the meeting the minutes were approved with no prior modifications requested.
There were five requests for TF membership; which will be reviewed based on previous meeting attendance.
After the introductions, Chairman Dr. Ramsis Girgis presided over the technical portion of the meeting.
The first item of business was an overview of the additions & changes implemented in the 2015 revision of the C57.12.00 and C57.12.90 Standards. These are summarized in the following bullets.
Implemented additions and changes in C57.12.00:
• In the “Audible Sound Level” section of Table 18 (Routine, design, and other tests for liquid-immersed transformers)
o Added the option: “Upon purchaser’s request, the transformer may be tested for its audible load sound level”. This allows the determination of the “Total sound level” of the transformer under
pre-specified load(s). For reference levels of load sound power, Annex B was added
• Added the requirement: “The purchaser’s specification shall make it clear whether the sound levels to be guaranteed refer to No – Load noise or the Total noise of the transformer; including Load Noise”.
Implemented additions and changes in C57.12.90: • Making the following corrections when using the Sound Pressure measuring method:
o Wall sound reflection correction Per IEC but limit correction to 4 dB and # of test room cases to 5
o Near-field correction -1 dB for ONAN contour, no correction for ONAF contour
• Using the “Sound Intensity Method” o Alternative method o Use newly developed correction for 4 < (Lp – Li ) < 6 dB o Consider method invalid for (Lp – Li) > 6
Annex J
Page 10 of 28
Use Sound Pressure method with corrections • Measuring Load Noise
o Measure when requested by Purchaser o Can measure at current 60 % < I rated < 130 % and correct per IEC
• Changing the ONAF measuring contour o Per IEC, 2 m all around transformer
• Determination of Total Noise level of a transformer o Adding Load and No Load noise levels, per IEC
The second order of business was a status update of the IEC noise standard. The following bullets are the bullets reviewed at the meeting. Status of IEC Noise Standard:
• Both the “Sound Determination” Standard and “Sound Application Guide” have been published as FDIS (Final Draft International Standard) and were approved
o Received minor editorial comments only • We provided technical comments that were not considered because only editorial comments are
permissible at the FDIS stage • Will be published as valid IEC standards in the near future • The documents are widely comparable to the IEEE Standard
The next order of business was presenting a review of the proposed CIGRE working group. The following is the information shared at the meeting.
Proposed CIGRE WG: • Title: “Power transformer audible sound requirements” • Convener: Dr. Christopher Ploetner • Background
o No reference / guidance on typical transformer sound levels o This often results in technically unreasonable sound level specifications
Unnecessary high But more recently often also too low, which often requires external sound
mitigation means (sound panels / enclosures) • Scope
o Define transformer classes with respect to sound level o Development of sound level ranges for core, load, and cooling system noise level for
each of the transformer classes o Study information on sound level legislation in different countries and compare with
technical findings o Summary information on sound mitigation (mounting, panels, enclosures, walls around
units) o Transformers to be considered: o Distribution and Power transformers 10 kVA to 1500 MVA o Distinction between 1 - Ф & 3 - Ф and 50 & 60 Hz units
• Meetings o First Meeting held on March 1-2, 2016 in Germany o Next Meeting scheduled for this August in Paris o Completion of work expected within 3 years
The next item on the Agenda was the development of reference No Load and Load noise levels for Power Transformers. The Chairman announced that the Performance Characteristics Subcommittee approved, in its fall 2015 meeting, a motion submitted by this TF that the TF be assigned the task of developing new Reference sound levels; using present data and recent work in these areas. This is since this TF has
Annex J
Page 11 of 28
completed its assignment of revising Clauses in C57.12.00 and C57.12.90 related to transformer noise Standards and testing. The TF has already started this work about 2 meetings ago. The Chairman first presented an overview of the recommended reference levels of Load Noise developed over the past two TF meetings for 3 – phase power transformers. The recommended reference levels are 10 dB higher than the levels calculated per the Reiplinger equation. The Chairman then presented measured load noise data of a limited number of 1-phase transformers ranging in power ratings from 25 – 250 MVA. The data again indicates that reference levels of Load noise of 1- phase transformers can be 10 dB higher than the levels calculated using the Reiplinger equation. Before this meeting, the Chairman sent requests to a number of Power Transformer manufacturers for measured load noise data. He expects to get this data in the next few weeks. The new data will be added to the already obtained data to hopefully finalize the proposed reference levels of Load noise of 1-phase transformers in the fall meeting of the TF. Shamaun Hakim of CG Power questioned whether the data reflected the different core types 1-phase transformers can have. The Chairman commented that the data included at least two core types and many other design features that impact Load noise. Ajith Varghese asked whether the full MVA rating of an Auto Transformer or the two - winding equivalent MVA should be used in the Reiplinger equation. The Chairman responded that the calculation using the equivalent 2 – winding MVA provides an underestimation of the measured Load noise level. The Chairman then led a discussion on the purpose of developing ‘Reference Noise Levels’. He presented the following two possible purposes during the meeting:
• Providing a Maximum Noise level if no special mean (s) of noise reduction is used in the design
• Providing ranges of Sound levels for No Load and Load Noise for some transformer classes (Per CIGRE plans)
He also questioned whether there is a need for anything but the proposed Maximum noise levels. In order to further understand the need for reference noise levels, the Chairman invited utility representatives present how they define the required sound levels of their transformers. A number of them presented how each developed their specification values. There were some NEMA minus 6 to 12 dB used and some had Standards that considered adhering to local noise ordinances of sound levels allowed at the boundary or at the closest residential areas. In order to maintain flexibility each substation was typically, not individually, used to set levels, but a value to cover a wide range of installations. Mr. Joe Foldi had commented from a consultant viewpoint that ideally specifying a level would be preferred based upon the resultant sound level at the first residence. He suggested that Reference Noise levels should be used only as a measuring stick to how much lower a guaranteed noise level of a transformer is from the Reference levels. This proposal was fully supported by the Chairman. Mr. Bill Boettger stated that in some cases the no load loss evaluation may be driving the core flux density down; resulting in a lower core sound level. Dr. Girgis commented that this has to be carefully evaluated for the specific transformer design; as the resultant load noise typically increases as the size of the core and windings increase for those designs. Mr. Sanjay Patel questioned the need for separate no load and load sound levels. He asked whether one level would not be sufficient. Dr. Girgis commented that there are different sound level requirements for nighttime and daytime; which correspond to different levels of Load. Hence, Reference No Load and Load Sound levels are needed. To move forward, the Chairman stated that he intends to request a tutorial on specifying Transformer sound level requirements to be presented to the IEEE Standards group by experts in the industry who perform these tasks on a routine basis. This would help the group understand the requirements of the Industry moving forward. Mr. Bertrand Poulin asked whether there is a need for an Application Guide. This will be discussed in the fall TF meeting. The meeting was concluded at 3:00 PM. Respectively submitted, Barry Beaster, TF Secretary
Annex J
Page 12 of 28
Ramsis Girgis, TF Chairman.
WG on Non-sinusoidal Load Currents C57.110 - R. Marek
Working Group for Revision of C57.110, Recommended Practice for Establishing Liquid- Immersed and Dry-Type Power and Distribution Transformer Capability When Supplying
Non-Sinusoidal Load Currents
MEETING MINUTES (UNAPPROVED)
Sheraton Atlanta Hotel; Atlanta, Georgia USA Monday, March 21, 2016
3:15 PM – 4:30 PM
Chair: Richard Marek Secretary: Samuel L. Sharpless
The fourth meeting of this working group took place at the Capital North meeting room of the Sheraton Hotel in Downtown Atlanta. The meeting was called to order at 3:20 PM by Richard Marek, Chairman.
15 members were present in a hand count at the start of the meeting, representing a quorum of the 27 registered members. 3 members arrived later for a total attendance of 18 members. There were 55 guests on the roster and 6 of those persons requested membership.
The meeting agenda was unanimously approved and the minutes of the November 2, 2015 meeting in Memphis, TN were presented for approval with one correction by Hasse Nordman. The minutes were approved unanimously.
As a preface to the meeting, the Chair first noted that in the last meeting a considerable amount of time was devoted to a discussion of Clause 6.2 which addresses how to estimate the eddy losses for a transformer when only the test report is available. This portion of the document dates back to the first edition in 1986 and has not been revised since that edition was published. The rationale for the guidelines suggested was lost long ago. Although the scope included transformers up to 50 MVA, originally it was mostly used for small dry type transformers. Subsequent revisions removed that size limitation. However, it seems likely that a user with a unit 10 or 20 MVA and larger would likely go back to the manufacturer for more information rather than relying on the gross estimates provided by this document.
In discussion regarding comments on Draft number 3:
- The chair congratulated Tom Holifield for finding an error in equation 21 which had gone unnoticed for several revisions. The probable error was suggested at the meeting in Memphis and at the time it was decided that it would be investigated and then discussed at the next meeting. After a careful review and many emails, the problem was located. Accordingly, the Chair congratulated Tom for finding and noting the error and also for being persistent in locating the source. Tom noted that the example using the equation was actually correct. However, an error in that example was also discovered in search of the primary error. These errors will be corrected in the next draft.
- The next topic was a proposed revision to Clause 6.2: Transformer capability equivalent calculation using data available from certified test report. The group had a long discussion concerning the portion of the stray loss that should be used in the eddy loss calculations at the last meeting. The Chair agreed to summarize the discussion and modify the text accordingly. A survey was sent to all members, but the response was disappointing with only 8 of 26 members
Annex J
Page 13 of 28
responding. All were in favor of the revision. With the meeting notice, the Chair included two revision proposals after the survey. Rev 1 was the result of discussions from the previous meeting. However, after the survey additional actual test data was submitted by Professor Alvaro Portillo, prompting Rev 2 which presents the guidelines in tabular form. Just before the meeting CSA data on LVGP dry-type transformers was also submitted by Dhiru Patel as well as data for power transformers by Ramsis Girgis and Hasse Nordman. Other manufactures have also promised to submit test data. This test data will be considered for an annex so that the data used to determine the estimates for this clause is not lost.
o Bertrand Poulin spoke on behalf of Hasse Nordman observing that the suggested rules for determining the split in losses was most applicable to smaller transformers. There was no dissention and the chair agreed to add this information in the preface to the table.
o The chair noted that the test data provided by Professor Alvaro Portillo demonstrates how difficult it is to characterize losses in a simple way. The data does not always follow the factors proposed in the original guidelines and not in the revision either. The chair expressed concern that revising the guideline to a table could give the impression of precision when it is in fact only a gross estimate that is generally very conservative.
o Jagdish Burde noted that neither row of the first table accounted for the precise 4:1 ratio and suggested that one of the rows include this ratio.
o Chuck Johnson of ABB expressed support of the tables as presented. o Aleksandr Levin recommended that the title of the tables should be “estimate of
distribution of total stray loss…” and he suggested combining certain rows of the second table.
o Mr. Levin also suggested changing “other stray losses” to be “stray losses outside of winding”. The chair noted that the existing wording better agrees with the wording elsewhere in the document. Sanjib Som proposed adding a note below the tables that defines “other stray losses”
o Vijay Tendulkar suggested combining the two tables. He also asked if note “e” should be 300% instead of 400%.
o The chair requested that anyone having additional data send it to him for comparison. Tim Mai and Arthur Cumella both said that they would provide data.
o Jagdish Burde suggested a need for voltage differences to be reflected in the table. The Chair requested that he send more information for consideration.
o Dhiru Patel said that data he supplied shows the table recommendation to be high compared to general purpose transformers. The chair reiterated that the table was intended to be conservative.
o Shamaun Hakim questioned the values in the table for larger transformers. The chair noted that the values were based around the data that was provided. He also noted that foil eddy losses increase dramatically with higher currents.
o Sheldon Kennedy stated that the numbers in the guide should be conservative - users should contact the manufacturer if more precision is required. Also, he cautioned against changing definitions because it can affect other standards.
New Business
- The chair noted that the PAR expires in December 2018. However, the document is nearly complete. Working Group approval will be required to request subcommittee approval before going to ballot, so the members should expect a survey ballot requesting approval before the next meeting.
- In preparation for the ballot, the chair requested; o Please verify personal data so that the ballot is correctly delivered. o Please look at the document now and be ready for ballot.
Annex J
Page 14 of 28
- The chair requested volunteers to double-check the examples in the document. The following volunteers were noted
o Dhiru Patel o Aleksander Levin o Others may be requested to assist
The meeting was adjourned at 4:15 PM.
WG on PCS Revisions to C57.12.00 - T. Ansari PCS Working Group on General Requirements C57.12.00
Performance Characteristics Subcommittee
IEEE / PES Transformers Committee
March 21, 2016 4:45 PM The Atlanta Sheraton Hotel
Atlanta, Georgia, USA
UNAPPROVED MINUTES The PCS Working Group on General Requirements for C57.12.00 met on Monday, March 21, 2016. The Chair Tauhid Ansari called the Group to order at 16:45 and explained purpose and scope of the WG. 46 Members and 84 guests were present, and as Working Group membership stands at 80 members, we did have a quorum and were able to conduct official business. The following 15 guests requested membership:
Brian Penny ATC Christopher Baumgartner We Energies Jarrod Prince ERMCO Jeremiah Bradshaw Bureau of Reclamation Kirk Robbins Exelon Generation Kristopher Neild Megger Marcos Ferreira LADWP Matthew Weisensee PacifiCorp Rodrigo Ronchi WEG-Voltran Ryan Musgrove OG & E Ryan Thompson Burns and McDonnell Selvaro Pugazhenthi VA Transformer Sukhdev Wallia New Energy Power Company Thomas Holifield Howard Industries Thomas Melle HIGHVOLT Tim-Felix Mai Siemens AG
The Agenda and the minutes from the Memphis meeting were approved (M. Perkins, K. Skinger), with no comments or amendments. Agenda Items were covered as follows. 1. OLD BUSINESS
A. WG Item 104, Sec 6.1 – Discuss the P dimension that affects the interchangeability of bushings.
Annex J
Page 15 of 28
This request comes from Keith Ellis. Discussion on this item started during the last WG’s. The Chair reported that he reviewed the subject with Steve Snyder, Chair for Std. C57.12.00, and that it was Steve’s impression that the subject does not belong neither to C57.12.00 nor to C57.12.10. Discussion within the WG followed. Jeff Ray described the case of having an LV bushing failure where components with similar electrical characteristics did not fit within the space for CT’s. In his opinion, turrets dimensions is a transformer manufacturer issue. As no motion was stated, the Chair agreed to continue reviewing the subject with other TC officials.
B. Sec.4.1, Sec.7.0 Clarification on Short circuit condition This item was brought up by Vinay Mehrotra, from WG C57.109. It was requested to define the worst condition to be considered for short circuit calculations. As under over-excitation of the transformer 110% rated voltage can be applied, it was asked if that pre-fault voltage should be considered, instead of the rated voltage. Mark Perkins and Javier Arteaga pointed out that C57.12.00 applies to transformer design and that the 110% over-excitation requirement is a system condition that should be considered apart. Jason Varnell, Kenneth Skinger and Jill Holmes were in favor of considering a pre-fault voltage between 105% and 110%. Joe Foldi explained how Canadian standards scaled down from 110% pre-fault voltage to 100%, considering that the last provides enough margin. He recommended also to consider practical consequences from raising the pre-fault voltage. Some users specify the pre-fault voltage they expect. A motion was brought up (Ajit Varghesse/Vinay Mehrotra) as to include a statement in C57.12.00 specifying that for short circuit calculations 1.0 PU is the pre-fault voltage and that anything different has to be specified by user. The motion was amended by Mark Perkins to start first with a survey among the WG’s Membership about this proposal. 26 Members approved the motion, with none opposed. The Chair agreed to conduct the survey before the next meeting. 2. NEW BUSINESS Shamun Hakim brought up that in windfarms specifications an unnecessarily high LV side fault capacity is required and if it should be considered in C57.12.00. The Chair agreed to survey about this question among the WG Membership. With no new business and having completed the agenda the meeting was adjourned at 5:30 PM (K.Skinger/E.TeNyenhuis). Respectfully submitted, Tauhid Ansari Enrique Betancourt WG Chair Secretary
Shunt Reactors C57.21 - S. Som
IEEE Standard Requirements, Terminology, and Test Code for
Shunt Reactors Rated Over 500 kVA C57.21
Atlanta, GA USA Sheraton Atlanta Hotel
Tuesday March 22, 2016 The working group met in the Capital Center room of the Sheraton Atlanta Hotel on Tuesday March 22, 2016, at 9:30 AM. The meeting was called to order at 9:30 AM by Chairman Sanjib Som
Annex J
Page 16 of 28
There were a total of 51 participants: 11 Members and 40 Guests out of which 7 Guests requested membership. The meeting was opened with the introduction of participants and the circulation of attendance
roasters. 11 of the current 16 (please check) WG Members were present and quorum to carry out business was
met. Meeting notes:
Meeting Agenda
• Meeting agenda, which was circulated among members and guests on March 4th, 2016 by email, was presented to the audience.
• Motion to approve the agenda was made by Hemchandra Shertudke and seconded by Enrique Betancourt.
• There were no objections or comments and the agenda was approved. Minutes from previous meeting
The minutes from the F15 meeting in Memphis, which were circulated on March 4th, 2016 by email, were presented to the audience.
Motion to approve the meeting minutes was made by Klaus Pointner and seconded by Enrique Betancourt.
There were no objections or comments and the F15 meeting minutes were approved. Old Business:
1. Luc Dorpmanns: Presentation of proposal for vibration test limits: This topic has been discussed
in previous meetings. The proposal includes comparison of what currently in the standard to IEC limits and also refers to related work by CIGRE WG. Proposal intended for discussion. In IEEE standard it covers units larger than 50 MVAr and 115 kV at rated voltage, with specific details on where to measure the vibration. It specifies average values and maximum below 200 µm peak-peak. In IEC it is a type test, for all shunt reactors at maximum operating voltage and less specific about number of points or location. Discussion to lower the limits took place at CIGRE and rejected. This presentation with full details will be distributed to Members and Guest for information and further discussion.
Proposal for revision of C57.21 includes for vibration test to be a design test instead of ‘other’-test, for all reactors and eliminate the average requirement, only stating the maximum pk-pk.
Comment from Mathew Welsensee: shunt reactors would vibrate more or less than other of the same identical design. Example in size: 3-phase 245 kV 15 to 30 MVAr.
Comment from Bertrand Poulin: support the idea of each reactor being tested as shunt reactor units don’t behave the same even of the same design; however sound is more sensitive to detect problems than vibration. Example in size: under 15 up to 765 kV; typically 30 to under 40 MVAr
Annex J
Page 17 of 28
Comment from Dharam Vir: every shunt reactor behaves differently; vibration test should be routine test and limit could be lowered.
Comment from Mike Sharp: Vibration tests should not apply to dry-type air-core shunt reactors.
2. Presentation by Gael Kennedy: Comparison of Section 4 of C57.21 to other transformer standards referring back to basic standard C57.12.00. The question is how to consider the C57.21 standard: as stand-alone or as part of a group referring back to C57.12.00. How to reference other standard within the standard? Note on this topic will be circulated by the WG Chair to the membership for inputs. Comment from Bertrand Poulin: clarification on the scope of C57.21 is needed to decide whether the standard is stand-alone or covered by C57.12.00. Does it include requirements? The title cover ‘requirements’.
Comment from Klaus Pointner: since C57.21 covers both oil-filled and dry-type, this standard should be stand alone. C57.21 should combine requirements for both and cover full scope for requirements and test.
3. Dieter Dohnal: Presentation on tap changer as applied to variable shunt reactors: this presentation covered different aspects on the application and use of OLTC on variable shunt reactors including construction, selection, regulation schemes, special requirements, etc. The full presentation will be send to the WG for information.
Other comments and input: Comment from Shamaun Hakim: on section 4.4.2: maximum allowed cooling air temperature for altitude higher than 3300 ft need to be lower. Need further clarification from Shamaun. Comment from Shamaun Hakim: on testing losses and analytical correction to reference temperature. Need further clarification from Shamaun. Standard is now available for distribution by WG Chair in Word and pdf formats for the subgroups to
start working on the modifications and revisions.
Subgroups as set by the Chair to work on different sections of the standard. The following members volunteered to work on:
Sections 1 through 4: Sanjib Som, A. Del Rio. Sections 5 through 9: David Joe Meisner, Subash Tully, Rogerio Verdorin, Raj Ahuja. Section 10: Bertrand Poulin, Shamum Hakim, Subash Tully, Klaus Pointner, Kris Ploetner Sections 11: Dharam Vir (new) Section 12: Mike Sharp Pictures: Rogerio Verdolin. Members and guests were requested that if anyone wished to participate in the above groups or if anyone’s name is not included inadvertently in the list, they were to contact the WG Chair.
Annex J
Page 18 of 28
Meeting was adjourned at 10:45 am. Next meeting: Fall 2016, Vancouver, Canada October 23-27. Comments, as sent, submitted prior to the meeting by email from Dr. Christoph Ploetner:
1. Comment to Bertrand’s Linearity proposal: It is a more practical adoption of IEC 60076-6, Annex B and I suggest to consider it for the revised standard. I agree with Enrique that it would be good to see some more test data for the DC method (tests for 1~ and 3~, not just simulations) before bringing it into the standard.
2. Loss evaluation based on power factor was extensively discussed during last revision of C57.21
but at the end not followed even though it is commercially probably the best. Loss guarantee at rated voltage remained applicable for simplicity reasons but also because this situation is the closest to service conditions. IEC guarantees losses at rated current in order to protect the manufacturer commercially. As whatever it is, quantities are within narrow bands, it technically therefore doesn’t matter and is more a commercial subject.
3. I volunteer to re-write section 10.6 ‘Audible-sound-level test’ and will provide this before the
Vancouver meeting. I will take latest changes in IEEE C57.12.90 and IEC sound standards into consideration – as I did for the recent IEC/IEEE HVDC standard revision.
4. I suggest Luke Dorpmanns to re-work section 10.7 and Klaus Pointner 10.8. As per San Antonio
discussion one major change here would be the vibration test becoming routine as fingerprint. Respectfully submitted, Chairman: Sanjib Som ([email protected]) Secretary: Arturo Del Rio ([email protected])
IEEE/IEC WG Wind Turbine Generator Transformers, P60076-16 - D. Buckmaster
WG P60076-16 Standard Requirements for Wind Turbine Generator Transformers
Chairman: David Buckmaster; Vice Chair: Phil Hopkinson; Secretary: Donald Ayers
The Working Group on Wind Turbine Generator Transformers was called to order at 9:30 a.m. EST on Tuesday, March 22, 2016 at the Sheraton Hotel in Atlanta, Georgia. There were 110 attendees, 34 members were present of a membership of 50 and 76 guests. A quorum was present. The chairman, David Buckmaster, was unable to attend the meeting and the Vice Chairman ran the meeting.
The following guests requested Membership on the Working Group. After two consecutive meeting attendance they will become members.
• Nikita Dave, Georgia Transformer, Rincon, GA • Jose Gamboa, Siemens Energy, Richland, MS • Mark Gromlovits, EMC OEM Products Division, Bristol, VA • Mohammad Iman, MGM Transformer Co., Commerce, CA • Brad Jensen, Burns & McDonnell, Kansas City, MO
Larry Lowdermilk made a motion to accept the agenda for the meeting and was seconded by Rogerio Verdolin. The motion passed unanimously.
Larry Lowdermilk made a motion to accept the minutes from the Fall 2015 meeting and was seconded by Rogerio Verdolin. The motion passed unanimously.
The vice-chairman gave a summary of the status of the standard. The standard has been commented on by both IEEE and IEC ballot groups. The IEEE comments have been addressed and resolutions recommended. The IEC commented on the IEEE resolved version of the standard and the comments resolved by IEC. The document was returned to the committee. The modified document was reviewed by the meeting attendees which could see both the IEEE and IEC comments.
A motion was made to by Larry Lowdermilk to accept the changes to the document as reviewed so that the modified document can be recirculated to both IEEE and IEC ballot groups. Only changes to the document are reviewable by both groups. The motion was seconded by Rogerio Verdolin and passed unanimously.
A discussion was held on the timing of the next step and it was concluded that the recirculation could not be completed before the PAR expires.
A motion was made by Larry Lowdermilk and seconded by Rogerio Verdolin to request a two year extension for the PAR. The motion passed unanimously.
With no new business, the meeting was adjourned at 10:25 a.m.
A working group session is planned for the Vancouver meeting.
Respectfully submitted,
Donald E. Ayers Secretary
WG on Semi-Conductor Rectifier Transformers -C57.18.10 - S. Kennedy
Task Force for Semi-Conductor Rectifier Transformers
Meeting Minutes – March 22, 2016 Atlanta, Georgia, USA
Sheldon P. Kennedy - Chair The Task Force met on Tuesday, March 22, 2016 at 11:00 AM with 5 members present and 41 guests. 9 guests requested membership. Sheldon Kennedy chaired the meeting. This was the first regular meeting for a Task Force since the spring of 2011 in San Diego.
Annex J
Page 20 of 28
The Task Force was formed to develop a new PAR for a revision that is due for the standard. A quorum was achieved with 5 of the 6 members present. The minutes and agenda were approved. The meeting concentrated on completing a new PAR. The scope of the original standard was modified to be sure to include transformers for rectifier, inverter, furnace and adjustable speed drive loads. It was requested to lower the Scope of the PAR to “100 kW and above” from “300 kW and above” for single phase loads Also, three phase loads were lowered from “500 kW and above” to “100 kW and above”. Also, Dhiru Patel had previously requested that we add to the excluded list “If a user connects mixed loads with more than 10% non-converter fundamental frequency power content, IEEE C57.110 shall apply”. This was modified to show the exclusion as: -mixed loads of more than 10% non-converter fundamental frequency power content. All other portions of the previous C57.18.10 Scope will be kept. There was discussion about whether a joint document with IEC 61378-1 Converter Transformers – Part 1, would be of interest. The Task Force felt this was premature and that while there are many common treatments in both documents, there are also significant differences at this time. A revision of IEEE C57.18.10 must be accomplished by January of 2019, so there is little time for this. The Chair will ask IEEE to procure a copy of IEC 61378-1 for harmonization work on the new C57.18.10 revision. While this work is being accomplished, notes will be made of common and different treatments for possible harmonization of the two documents into one in the future. The Chair again made a call for additional Task Force/Working Group officers. William Whitehead of Fuji Electric had previously volunteered to be Vice Chair to help with the work. David Walker of ABB volunteered to be Secretary of the Task Force and succeeding working group. Future topics for addition to the revision of the document plan to include phase shifted windings; electrostatic ground shields; interphase transformer applications and why circuit breaker interaction and snubbers; and non-classical harmonics and waveforms due to new inverter and adjustable speed drive topologies. The Chair will complete the PAR form for submission to the NesCom. There were no further comments. The meeting adjourned at 12:15 PM. Submitted by; Sheldon P. Kennedy Chair
WG Loss Evaluation C57.120 - R. Verdolin
Spring 2016 IEEE Transformers Committee Meeting — Atlanta, GA, USA
Annex J
Page 21 of 28
PC57.120 LOSS EVALUATION GUIDE FOR DISTRIBUTION AND POWER TRANSFORMERS AND REACTORS
Tuesday, March 22nd, 2016 — (11:00 AM – 12:15 PM)
Chair: Rogerio Verdolin Vice-Chair: Rod Sauls Par status: Par approved Par expiration date: December 31, 2016 Current draft being worked: D15
1. Attendance a. Members: 12 b. Guests: 90 c. Guests granted membership: XX d. Guests requested membership XX e. Total (Members + Guests): 102
2. Meeting was called to order promptly at 11:00am on March 22nd, 2016. 3. Rosters were passed out and introductions were made. 4. Rogerio asked for a motion to approve the minutes of the Memphis meeting. Wallace Binder
made the motion to approve the minutes. Ewald Schweiger seconded the motion. 5. Attendance was checked to see if a quorum was established. There were 19 active members on
the roster and at least 10 were needed for a quorum. There were 12 members present. 6. Rogerio asked for a motion to approve the agenda. Eduardo Garcia made the motion to approve
the agenda. Wallace Binder seconded the motion. 7. Both the minutes and agenda were approved. 8. Rogerio discussed highlights from the latest draft and mentioned corrections to some of the
formulas in the document. 9. Wallace Binder made a presentation on the alternate methods of loss evaluation for non-vertically
integrated companies. 10. Question was asked about the differences of vertically integrated vs. non-vertically integrated.
Wallace answered basically saying the vertically integrated has generation, transmission and distribution components while non-vertically integrated does not have one or more of these components.
11. Rogerio mentioned the previous IEEE legal review/comments on how to use $$ in the document. 12. Wallace Binder made a motion to that the WG approve the latest draft to go to ballot. David
Murray seconded. 13. All 12 attending members voted to approve for ballot. 14. Rogerio discussed next steps in the process and Gary Hoffman made the comment that he would
need to get on the PCS subcommittee meeting agenda for approval as well. 15. Rogerio asked for volunteers to help with the ballot resolution. The following persons
volunteered: Marcos Ferreira Wallace Binder Rogerio Verdolin Rod Sauls Hamid Sharifinia S. Dev Walia
16. Meeting was adjourned.
Respectively submitted, Rogerio Verdolin, Chair Rod Sauls, Vice-Chair
Annex J
Page 22 of 28
WG 3-ph Transf. Connections C57.105 - A. Bromley
Spring 2016 IEEE Transformers Committee Meeting — Atlanta, GA, USA C57.105 – IEEE Guide for Application of Transformer Connections in Three-Phase Electrical Systems
2. The meeting was called to order at 1:45 pm on Tuesday, March 22nd, 2016. 3. Chair presented agenda for the meeting. A motion to approve agenda for the meeting was
made by John John and was seconded by Samuel Sharpless. 4. A motion was made by John John to approve the meeting minutes from the Working Group
Spring 2015 meeting in Memphis, TN. The motion was seconded by Samuel Sharpless. By unanimous vote, the minutes were approved.
5. Par status: Par expires December 31st, 2019, which represents 4 meetings before we have to conclude the guide. The PAR was approved March 2015.
6. Rogerio Verdolin and David Walker have provided the references regarding ferroresonance. David Jacobson, from Manitoba Hydro, an expert on ferroresonance and one of the authors of the Cigre guide, has agreed to help Rogerio and David to find appropriate, modern, references on ferroresonance. We are also going to look for more modern, easy to obtain, general information on transformer connections to supplement or perhaps replace some the out-of-print textbooks listed in the current references.
7. The references regarding ferroresonance are: [1] Mork, B.A., Morched, A.S., and Walling, R., “Modelling and Analysis Guidelines for the Investigation of Slow Transients in Power Systems: Part III-Study of the Phenomenon of Ferroresonance”, Slow Transients Task Force of IEEE Working Group on Modelling and Analysis of System Transients Using Digital Programs, July 27, 1996. [2] Ferracci, P.,“Ferroresonance”, Groupe Schneider: Cahier technique no 190, pp. 1-28, March 1998. web site: http://www.engineering.schneider-electric.se/Attachments/ed/ct/ferroresonance_en.pdf [3] Jacobson, David A. N., “Examples of Ferroresonance in a High Voltage Power System”, Conference Paper, IEEE Power Energy Society Annual meeting, Toronto, Canada, July 2003. [4] Dugan, Roger C., “Examples of Ferroresonance in Distribution Systems”, Conference Paper, IEEE Power Energy Society Annual meeting, Toronto, Canada, July 2003. [5] CIGRE 569 - Resonance and Ferroresonance in Power Networks, Working Group C4.307, February 2014, ISBN: 978-2-85873-264-7.
Annex J
Page 23 of 28
8. The Chair will add the previous ballot comments provided by John John to the new draft. Most of comments were editorial.
9. The Chair has shown the revision he has made in the draft by using the IEEE style guide. The Figures were provided by Samuel Sharpless using AutoCAD/jpeg format. Some Tables were changed to Figures. Symbols will be changed to text, such as Transformer connections: delta, wye, zigzag, etc.
10. The Chair asked for volunteers to help to review the draft. 11. John John and Samuel Sharpless volunteered to review Sections 4 and 5, Electrical
Connections and Magnetic Circuits. 12. Mike Thibault volunteered to review Section 6, Harmonic Currents and Voltages. 13. Daniel Mulkey and Benjamin Garcia volunteered to review Section 7 - Primary Faults,
Section 8 - Unbalanced Loads and Secondary Ground Faults, and Section 10 - Unsymmetrical Banks and Special Connections.
14. The Chair/Vice-Chair will contact David Jacobson to find out if he would be able to help us review Section 9 - Ferroresonance. David Walker will also provide some information regarding his experience with ferroresonance.
15. The WG still need to work on the bibliography. References for transformer connections were provided by members such as: Electric Power Transformer Engineering, The J&P Transformer Book, and others. Other GE and ABB references will be provide by members to be included in the draft.
16. The meeting adjourned at 2:30 PM. Respectively submitted, Adam Bromley, Chair Rogerio Verdolin, Vice-Chair
WG on Distributed Photo-Voltaic Grid Transformers C57.159 - H. Shertukde
Working Group PC 57.159 Guide on Transformers for Application in Distributed Photovoltaic (DPV) Power Generation Systems
Unapproved Meeting Minutes Atlanta, GA, USA
Tuesday, March 22, 2016 AGENDA 1. Roster and Quorum Verification 2. Meeting Agenda Approval 3. Approval of the F2015 Memphis Meeting Minutes 4. Update on the ballot results and comment resolution of the Guide Draft 6: Recirculation #1 and recirculation #2 5. Guide Draft 6.2 submitted to RevCom 6. Discuss the next WG meeting in Vancouver 7. New Business The Working Group met in the Capital North room of Sheraton Atlanta Hotel. This was eights meeting of the WG. The meeting was called to order at 1:45 pm by Chairman H. Shertukde. The meeting was convened with 53 participants present, 18 of them are members (this constitutes a quorum out of 30 current members in the roster).
Annex J
Page 24 of 28
The Meeting Agenda was approved. The Fall 2015 Memphis Meeting Minutes were approved. 1. Chairman H. Shertukde updated WG on submission of Guide Draft 6.2 after recirculation # 2 to RevCom. WG officers expressed appreciation to WG members for the active participation in the development of the Guide. H. Shertukde mentioned about the tutorial our WG will present to the IEEE TC general session in Atlanta. Thanks to C. Gaytan and S. Kennedy for their contribution. Chairman also informed the group the he has presented the WG position paper to International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT) in India. The position paper will be published in IEEE Explore. 2. Secretary A. Levin updated WG on the results of the Guide ballot recirculation # 1 and # 2: - just one individual has disapproved the Guide Draft 6.1 and provided 4 comments related to the definitions. The comments were accepted and Draft 6.2 was submitted for the ballot recirculation # 2. - just one individual has disapproved the Guide Draft 6.2 and provided 2 comments. One comment related to the definitions was accepted, but other comment was rejected as it was out-of-scope of the recirculation # 2 (comment on the unchanged portion of the standard after 75% approval vote has been achieved). - the Guide Draft 6.2 has been submitted to the IEEE RevCom for approval. Our PAR will expire on 31 December 2016. S. Kennedy commented that we need monitoring comments from RevCom, address them and receive confirmation that resolution is accepted. P. Hopkinson recommended to watch PAR expiration date in order to submit the PAR extension, if necessary, on time. 2. A. Levin reviewed the content of the Guide Draft 6.1. 3. A. Levin has presented and WG discussed the list of the additional topics that were indicated during the Guide development for the future consideration. 3.1. Add 5.1.4.1 Winding Connections and Utility Consideration. 3.2. Fast transient voltage in PWM (pulse-width modulation) inverters due to IGBT commutations. V. Tendulkar explained his suggestion for specific consideration of aging of insulation subjected to multiple IGBT commutation impulses. He referred to known problems with motor conductor insulation. S. Walia commented that similar phenomenon observed in relation to cables in wind power AC-DC systems with inverters. 3.3. Transformer sizing based on loading. P. Hopkinson commented that he is going to propose to Distribution Transformers SC to form a TF to investigate the loading of transformers up to 10 MVA based on application (including renewables), geographical region, etc. He thinks that we can find end users that will share available information in order, eventually, to develop justified recommendations on the transformer sizing. 3.4. Does electrostatic shield really necessary in all cases? V. Tendulkar agreed that it’s possible to develop more specific recommendations on the application of shields in DPV transformers. 3.5. Improve recommendations on Winding Configuration and Impedance Requirement for 3-winding transformers. 3.6. Include consideration of other available inverter and system topology technologies (e.g. string inverters). 3.7. Grounding of skid mounted transformers. B. Ensen informed that he forwarded this question to Distribution Transformers SC. 3.8. Reverse power flow transformers. A. Levin informed on CIGRE Working Group A2.50 “Effect of the distributed energy sources and consequent induced reverse power flow (step up) on transmission and distribution transformers”.
Annex J
Page 25 of 28
3.9. B. Petosic proposed consideration of the Guide on transformers connected to inverters (battery energy storage, fuel cell, etc.) J. Mango commented that large battery storage systems (up to 20 MW) can have multiple charge – discharge operations per hour and its effect on transformers needs to be addressed. P. Hopkinson said that, during the meeting of WG on rectifier transformers, it was proposed to create a TF to investigate a feasibility of the Guide for transformers connected to inverters. 4. The decision on the IEEE TC Fall 2016 WG meeting in Vancouver will be taken later based on the results of RevCom review of the Guide. With no more old or new business the Meeting adjourned at 3:00 PM. Chairman: H. Shertukde Vice-Chairman: M. Sauzay Secretary: S. Levin
TF on HV & EHV Transients C57.142 - J. McBride
IEEE / PES Transformers Committee
Performance Characteristics Subcommittee TF to Investigate the Interaction between Substation Transients
and Transformers in HV and EHV Applications Atlanta, Georgia
Tuesday, March 22nd, 2016 3:15 PM – 4:30 PM
Capitol North Chairman – Jim McBride Secretary – Tom Melle
1) Welcome and Chair’s introductory remarks. 2) Circulation of Attendance Sheets 3) There were 127 individuals in attendance with 28 members present. Quorum was achieved. 4) Fall 2015 Meeting Minutes presented and approved with no opposition 5) Spring 2016 Agenda presented and approved with no opposition 6) Chair mentioned the summary paper will be posted to the TF website. Sue McNelly did so
immediately. Thank you Sue! 7) Chair began presentation and discussion of three primary issues from the Fall 2015 meeting. All
three issues are addressed in the latest revision of the TF summary paper: I. The Chair presented a few example traces of a three phase capacitor switching
transient from the TF paper, noting that capacitor switching can produce three types of interactions. Simple LC interaction, back to back interaction, and traveling waves with reflections. The second two were most likely to excite lightly loaded transformers to resonance.
a) Phil Hopkinson suggested that (whenever possible) current measurements and traces from all three phases be included in the paper. Chair was not opposed to this, but no motions were made to make changes to the TF summary paper.
b) The example oscillations presented ranged from 1.1 kHz (base) to 52 kHz.
Annex J
Page 26 of 28
c) Waldemar Ziomek commented that phases A & C are opposite polarity due to transformer interaction and reflection of waves. The chair also showed a trace of an energization transient which had a much higher frequency voltage waveform. Approximately a 500ns rise with a 580 kHz ring.
II. Mitigation Methods - Chair reviewed the mitigation sections of each of the failure categories in the TF summary paper. Chair commented that RC snubbers are not commonly used on HV/EHV circuits. Phil Hopkinson agreed it is difficult to mitigate transients at higher voltages with snubbers and supports capacitor use as a mitigation tool. It was noted that special emphasis should be applied whenever possible to monitor and mitigate high frequency transients.
a) Pierre Riffon made a motion for the TF paper to include additional impulse testing as a possible mitigation method (e.g. non-impulsed windings are typically shorted to ground in the factory – suggest “real world” shorting using simulated impedance of system during test). Motion was seconded by Waldemar Ziomek and passed with no objections.
III. Chair explained the separation of Conclusions and Recommendations sections in the paper. Chair stated that the TF paper is nearly finalized and must undergo review for IEEE Transactions submission. Ideally the paper will be utilized in an upcoming Committee tutorial.
a) Phil Hopkinson inquired regarding the duration of magnetization current and relationship to core saturation. Comments were received stating the more likely contributors to failure are series resonant voltage, air core inductance, and leakage flux. Phil asked if the TF paper should describe these resonant interactions that cause failures. The Chair pointed out that this interaction as a failure mode is included in the GSU backfeed section of the paper, noting that generator step-up transformers operating in back feed mode may be excited to resonance by system transients.
b) Bertran Poulin commented that the low frequency response of transformers is easier to model; as high frequency response requires a more detailed model. Chair added that CIGRE continues to develop “white-box” transformer models, but measurements are needed in order to validate these models. Bertran commented further on the importance of measuring the magnitude of the transient voltage at the transformer terminal – given this information, “it is imperative that manufactures design transformers with necessary immunity”.
c) Phil Hopkinson commented on Figure 4 (Disconnect Switch Bus De-Energization Transient) that re-striking can last up to several seconds, leading to many consecutive restrikes per disconnector operation. Chair agreed and commented that although restrikes during closing operations are generally much shorter, these closing operations may also excite internal resonance due to multiple re-ignitions and re-strikes.
d) Vijay Tendulkar commented that core saturation is dependent upon total circuit impedance and that very different conditions can arise in differing circuits from the same voltage transient.
8) Motion for Task Force to move forward with submission of the paper to IEEE made by Sanjib Som. Motion was seconded by Phil Hopkinson with no objections.
9) New Business – none presented
10) A motion to adjourn the meeting was made by Pierre Riffon and seconded by Bertran Poulin. The meeting was adjourned at 4:15 PM.
Annex J
Page 27 of 28
Respectfully Submitted, Tom Melle, TF Secretary
03/22/2016
TF on short Circuit Criteria - S. Patel
Task Force Short Circuit Criteria Atlanta GA, USA – Mar 22, 2016
Ed teNyenhuis, Mar 23, 2016, Rev 0 The Task Force met at 4.45 PM in the Capital South Ballroom on Mar 22, 2016
At the first meeting of the TF in Memphis, it was approved by the TF that IEEE should have some
short circuit design criteria in the standards. The subcommittee reviewed this and then gave the TF the task to give recommendations on how the short circuit criteria should be done in IEEE standards and to possibly collaborate with IEC. This was the purpose of this meeting.
Sanjay Patel was the Chairman of the meeting and Ed teNyenhuis was the secretary.
An attendance roster was circulated with 6 requesting membership. There were 73 persons total in
attendance with 24 members. The membership list had 41 members so there was quorum.
The minutes from the previous meeting were approved (initiated by Phil Hopkinson and seconded by Krzysztof Kulasek).
The initial suggested options were presented by the Chairman: Dual logo guide with IEC (they are revising the standard now) Do our own guide where we develop it on our own Do our own guide where we take the wording from the new IEC guide that fits with IEEE Add wording to some other IEEE Std or guide (C57.12.90?)
Joe Foldi presented again the background of the short circuit design criteria request: Transformers must be designed for short circuit but what is the criteria to use? Can we have
agreed upon design limits? The IEC guide is a baseline guide and is not mandatory and IEEE should consider to have
something similar
There was discussion on the subject from manufacturers and users: Main issue is the interpretation of the calculated results (Sanjay Patel) IEEE should not tell manufacturers how to design transformers for SC (Waldimar Ziomek) CSA has agreed to follow the IEC Annex A as a guideline (Waldimar Ziomek) KEMA short circuit testing for the last 15 years shows that 1 in 4 fail and that the failure is not
always in the windings (Shankar Subramany) The manufacturing is very important with regards to short circuit (Joe Foldi) Each company has its own design calculations that are validated by testing (Vinay Mehrota) Should we adopt the highest or lowest criteria? This will be difficult to get consensus on
(Krzysztof Kulasek) We should do our own guide based on IEC and keep in contact with IEC to harmonize as much as
possible (Jason Varnell)
Annex J
Page 28 of 28
Users are happy with any option as long as they follow some criteria Some users have criteria already in their specs
A motion “for IEEE to go in the direction of producing an IEEE guide that uses input from the IEC
guide” was initiated by Bill Boettger and seconded by Joe Foldi. This motion passed by 15 to 1 votes.
The meeting was adjourned at 6.00 pm (motion initiated by Markus Schiessl and seconded by Bill
Boettger)
Annex K
Page 1 of 15
Annex K Power Transformers Subcommittee
March 23, 2016 Atlanta, GA USA Meeting Time: 1:30 p.m.
Chair: Joe Watson Vice Chair: Bill Griesacker Secretary: Kipp Yule
K.1 Meeting Attendance
The Power Transformer s Subcommittee met on Wednesday, March 23, 2016, at 1:30 PM. A call of members indicated that 93 of 112 members were in attendance, achieving a quorum at the meeting. Overall, there were 210 attendees with 93 members and 117 guests. (There were 16 new SC members who requested membership after the meeting, so SC membership is currently 128).
K.2 Approval of previous meeting minutes, and meeting agenda
The Chair presented the Agenda, Attachment K.2, and it was approved.
The Chair requested a motion to approve the Fall 2015 Memphis meeting minutes. The motion was made by Dan Sauer and seconded by Wally Bender, and the minutes were subsequently approved by unanimous vote.
K.3 Chair’s Remarks It was reinforced at the Administration SC that record the name and affiliation of all people attending each WG, TF or SC meetings. While this can be done by entering the full list of attendees in the meeting minutes, the Administrative SC has agreed that this can best be accomplished by recording the attendance of each meeting in the AM system. All working groups are required to enter the individual’s attendance in the AM system. Also, there will be Poster Session at IEEE T&D show this year for anyone that wants to explain and showcase the WG activities.
K.4 Working group reports
K.4.1 Revision of C57.12.10 IEEE Standard Requirements for Liquid-Immersed Power Transformers – Gary Hoffman See details of meeting minutes in Attachment K.4.1. A quorum was achieved. Comprehensive discussion on Clause 4, Clause 5, and Clause 6 are well detailed in the WG minutes. The WG passed a motion to circulate a straw ballot. There was a discussion of the topic of metrification with varying views with regard to a global market, and utility customer expectations, with no conclusion due to time limitation of meeting.
Annex K
Page 2 of 15
K.4.2 Revision of C57.93 IEEE Guide for Installation and Maintenance of Liquid-Immersed Power Transformers – Mike Lau See details of meeting minutes in Attachment K.4.2. The PAR expires in 2016. A PAR extension was submitted and is on the NesCom agenda for approval.
The working group officers reviewed draft 1.2 comments and proposed resolutions. Draft 1.3 with the officer recommendations was posted for working group review.
Several issues were identified which require input form the working group to resolve. A comment resolution group is reviewing the draft 1.2 comments, and the officer recommendations, with final comment resolutions to be submitted.
A discussion on the frequency of fan exercising was held, but conclusions were not reached.
A discussion on test voltages applied under vacuum was held. A task force will investigate this issue and make a recommendation to the working group.
The Piper chart in the guide is out of date and will be revised.
K.4.3 Revision of C57.125 Guide for Failure Investigation, Documentation, Analysis and Reporting for Power Transformers and Shunt Reactors – W. Binder No meeting was held. Revisions to the guide were approved and the document published in December 2015.
K.4.4 TF to Compare C57.131-2012 Standard for Load Tap Changers and IEC 60214-1 ED 2.0 for consideration of recommending adoption of IEC standard (Also WG 60214-2 Tap-Changer Application Guide) - Craig Colopy See details of meeting minutes in Attachments K.4.3.1. and K.4.3.2. 2. TF Chairman provided the SC a background relating to the work being done to adopt the IEC standard 60214-1 as a dual logo document preserving main technical differences between C57.131 and 60214-1 in an Annex. General opinion from TF is prospects are very good to bring these two standards together as one significant standard covering all industry available tap-changers. This dual logo document establishes a base for a future joint revision by IEEE and IEC members when the stability of IEC 60214-1 has expired. It was published in 2014 with a preliminary stability date of 2019. Annex E of C57.131 is included within the new joint revision of 60214-2, Tap Changer Application Guide. The recommendation to Power Transformer Subcommittee is creation of a WG for the purpose of creating a replacement of C57.131-2012 by adoption of IEC 60214-1 with an Annex to include significant technical differences between C57.131 and 60214-1 A motion was made to form the Working Group by Craig Colopy and seconded by Dan Sauer. SC Chair asked for discussion, there was none. The SC Chair asked if there were any objections, being there were none the motion passed. WG Chair Part 2 explained a recap the seventh work session in Venice were presented by Axel Kramer. A presentation on “DRM Diagnostic Test Technique for OLTCs” was made by Raka Levi and Marcos Ferreira. (See new business regarding tutorial recommendation). WG Chair advised opportunities for future working sessions:
Nashville, Tennessee, June 6 – 7 2016, Dresden, Germany September 5 – 6 2016 Vancouver, BC Canada, Oct. 27 – 28 2016
Annex K
Page 3 of 15
K.4.5 C57.140 Guide for the Evaluation and Reconditioning of Liquid-Immersed Power Transformers – Paul Bowman See details of meeting minutes in Attachment K.4.4. Based on the work completed and the WG having vote with 2/3 majority, the WG Chair made a motion to SC to Go To Ballot with PC57.140, Dan Sauer seconded the motion. The SC Chair asked for discussion, and with no discussion offered, then asked if there were any objections. There were no objections by the SC members and hence the motion to Go To Ballot passed. It was noted that the WG Secretary had resigned and at the present time a replacement will not be pursued.
K.4.6 Revision of C57.148 Guide for Control Cabinets for Power Transformers The TF to study the need for revising C57.148, the Standard for Control Cabinets for Power Transformers met for the first time at 11:00 AM on Monday. March 21st, 2016, with 39 attendees, 23 of whom volunteered for membership in the group. The Task Force recommended moving forward as a WG and this was later approved by the Subcommittee. Joe Watson will serve as Chair of the WG, Weijun Li will serve as Vice-Chair and Jean-Francois Collin will serve as Secretary. 13 members of the TF volunteered to review the entire existing document to determine which sections should be revised and to report their findings at the WG meeting in Vancouver. A request for a PAR has been submitted for this revision to the Standard and is expected to be approved before the next meeting in Vancouver. The group will meet again at the Vancouver meeting as a WG if the PAR is approved, or as a TF if the PAR approval is still pending. A motion was made by Dan Sauer with Second by Robert Thompson, the SC Chair asked if there any objections, being there were no objections, the motion the from a Working Group passed.
K.4.7 Revision of C57.150 Guide for the Transportation of Transformers and Reactors Rated 10,000 kVA or Larger Will start up working group at next meeting for revision of the Guide. A motion by Craig Swinderman was made to from a Task Force, the Motion passed without any objections.
K.4.8 Development of PC 57.153 Guide for Paralleling Transformers - Tom Jauch No meeting was held. Nothing reported.
K.4.9 Development of PC57.156 Guide for Transformer Tank Rupture Mitigation of Liquid-Immersed Power Transformers and Reactors - Peter Zhao Working group did not meet. Robert Thompson reported that a 3rd circulation has been completed, there was one comment that has been resolved. Following a fourth circulation the Guide will then will be sent RevCom. A PAR extension was submitted and approved.
K.4.10 Development of PC57.157 Guide for Conducting Functional Life Tests for De-Energized Tap Changer Contacts - Phil Hopkinson There was no meeting. The guide was approved and was published. The working group will not meet at the next Transformers Committee meeting.
Annex K
Page 4 of 15
K.4.11 Development of Standard Requirements for Phase Shifting Transformers - IEEE/IEC 60076-57-12 - Raj Ahuja The document has completed balloting process. Steve Antosz provided the summary report. Work is complete, and has been balloted in both IEC & IEEE.
K.5 Old Business None.
K.6 New Business Marcos Ferreira – Requests the PTSC to sponsor a tutorial on LTC testing. Chair suggests that several companies and users would be invited. Plan would be at future meeting. Motion made by Richard Amos with second by Diana Woods. Discussion by Axle Kramer should include several methods for field testing of LTCs. There was no opposed to future tutorial, the motion passed. The topic of forming a Task Force on Field Testing of LTCs was discussed. After discussion regarding field testing covered by C57.152, and baseline testing performed in factory. Chair asked for a motion, however, there was no interest and topic was closed. Chair will raise subject in the Standards SC. There was a request for Volts per Hertz over time from the relay committee, Russ Patterson as to what is the appropriate curve. The Chair suggested this be addressed by an Amendment to C57.116 – (Directly Connected to Generator) where over excitation is covered. There is a Figure 2-15 in the EPRI Power Plant Electrical Reference Series book that shows one manufactures estimate of overexcitation as located by Kipp Yule. Typically, such curves are requested by the buyer to support relay protection setting on new projects; however, the relay committee is trying to determine how to apply to existing installations. Don Anderson pointed out the Volts per Hertz capability curve is very dependent on the transformer design. The chair indicated there could possibly be a method to convert excitation current to Volts per Hertz and it may be applicable to more than just generator connected units. The Chairs asked for a motion if a Task Force should be formed to investigate if a section on Volts per Hertz should be added to C57.116 as an Amendment. Gary Hoffman suggested rather than a Task Force that a Par Study group be considered; however, no change to motion was made and the vote to form the Task Force was passed with no objections. Chair asked if there was any new business for C57.17 Arc Furnace Transformers – none was reported. Phil Hopkinson provided a view point on regarding if the switching surge test actually is representative of the switching events in the real world. There is Task Force that will meet next meeting and those interested are encouraged to attend.
K.7 Adjournment The meeting adjourned as scheduled.
K.8 Attachments –Working Group Meeting Minutes and Agenda Attachment K.2 – S16 PTSC Agenda Attachment K.4.1 – PC57.12.10 Standard Requirements Attachment K.4.2 – PC57.93 Installation Guide Attachment K.4.3.1 – TF IEC 60214-1 / IEEE C57.131 Tap Changer harmonization
Annex K
Page 5 of 15
Attachment K.4.3.2 – WG 60214-2 IEC Tap Changer Part 2 Application Guide Attachment K.4.4 – PC57.140 Evaluation and Reconditioning Guide
Annex K
Page 6 of 15
Attachment K.2
AGENDA IEEE Transformers Committee / Power Transformers Subcommittee
Wednesday, March 23, 2016, 1:30-2:45 PM Sheraton Atlanta Hotel, Capital Ballroom, Atlanta GA, USA
Joe Watson – Chair, Bill Griesacker – Vice Chair, Kipp Yule - Secretary 1. Call to order 2. Introduction and distribution of attendance sheets 3. Determination of a quorum 4. Approval/correction of the spring 2015 minutes 5. Report from the Administrative Subcommittee meeting 6. New Business 7. Working Group and Task Force reports
Project Title Chair IEEE/IEC 60076-57-1202
Development of Standard Requirements for Phase Shifting Transformers (PAR to 12/31/2016) *
Raj Ahuja
C57.12.10
Revision of IEEE Standard Requirements for Liquid-Immersed Power Transformers (Next revision due 9/30/2020, PAR to 12/31/2019)
Gary Hoffman
C57.17 Revision of Requirements for Arc Furnace Transformers (Published in 2012, next revision due in 2022) *
Robert Ganser
C57.93 Revision of IEEE Guide for Installation and Maintenance of Liquid-Immersed Power Transformers (Published in 2007, next rev. due in 2018, PAR to 12/31/2016)
Mike Lau
PC57.116 Revision of Guide for Transformers Directly Connected to Generators (Published in 2014, next revision due in 2024) *
Gary Hoffman
PC57.125 Revision of Guide for Failure Investigation, Documentation, Analysis and Reporting for Power Transformers and Shunt Reactors (Published in 2015, next revision due in 2025) *
Wallace Binder
C57.131 IEC 60214-1 IEC 60214-2
IEEE Standard Requirements for Load Tap Changers – Joint IEEE/IEC revision Craig Colopy
C57.135 IEEE Guide for the Application, Specification and Testing of Phase-Shifting Transformers (Published in 2011, next revision due in 2021) *
Jin Sim
PC57.140 Revision of Guide for Evaluation and Reconditioning of Liquid-Immersed Power Transformers (Published in 2006, next revision due in 2018) (PAR to 12/31/2017)
Paul Boman
C57.143 Guide for Application for Monitoring Equipment to Liquid-Immersed Transformers and Equipment (Published in 2012, next revision due in 2023) *
Donad Chu
C57.148 Standard for Control Cabinets for Power Transformers (Published in 2011, next revision due in 2021)
Joe Watson
C57.150 Guide for the Transportation of Large Power Transformers and Reactors (Published in 2012, next revision due in 2022) *
Greg Anderson
PC57.153 Development of Guide for Paralleling Transformers (Published in 2015, next revision due in 2025) *
Tom Jauch
PC57.156 Development of Guide for Transformer Tank Rupture Mitigation of Liquid-Immersed Power Transformers and Reactors (PAR extended to 12/17) *
Peter Zhao
Annex K
Page 7 of 15
PC57.157 Development of Guide for Conducting Functional Life Tests for De-Energized Tap Changer Contacts (Published in 2015, next revision due in 2025) *
Phil Hopkinson
IEEE 638 Revision of IEEE Standard for Qualification of Class 1E Transformers for Nuclear power Generating Stations (Published in 2013, next revision due in 2023) *
Craig Swinderman
* No meetings were scheduled during this time for these documents 8. Old Business 9. Collection of Attendance Sheets 10. Adjournment
Annex K
Page 8 of 15
Attachment K.4.1 Meeting Minutes Posted on PTSC Webpage Revision of C57.12.10, 230kV and Below Safety Requirement Use the following link:
Attachment K.4.2 WG Revisions to Installation of Power Transformers C57.93
Monday, May 21, 2016 1:45 MM – 3:00 PM Atlanta, GA
Minutes of the Working Group Meeting Chair Mike Lau called the WG meeting to order at 1:45 PM on May 21, 2016. 16 of 24 members were present, so a quorum was achieved. 91 guests also attended, for a total attendance of 107. Attendance will be recorded in AMS. Twenty (20) guests requested membership. A motion to approve the agenda was made by Wally Binder and seconded by Kipp Yule. The motion passed unanimously. A motion to approve the fall 2015 minutes was made by Joe Watson and seconded by Wally Binder. This motion also passed unanimously. Mike Lau reminded the working group that the PAR expires in 2016. A PAR extension was submitted and is on the NesCom agenda for approval. The working group officers reviewed draft 1.2 comments and proposed resolutions. Draft 1.3 with the officer recommendations was posted for working group review. Several issues were identified which require input form the working group to resolve. A comment resolution group was formed last fall, comprised of Wally Binder, Patrick Rock, Ken Sullivan, Alwyn VanderWalt, Scott Reed, Stephanie Denzer, Alan Peterson, Rick Simonelli, and the working group officers. Ismar Guner, Don Platts, and Eduardo Wild were added this meeting. This group is tasked with reviewing the draft 1.2 comments and the officer recommendations, then submit final comment resolutions to the working group for acceptance. A discussion on the frequency of fan exercising was held, but conclusions were reached. A discussion on test voltages applied under vacuum was held. A task force comprising Joe Watson, Ismail Gunar, Larry Kirchner, Mike Miller, and Chuck Sweetser will investigate this issue and make a recommendation to the working group. The Piper chart in the guide is out of date and will be revised. The next working group meeting will be in Vancouver, British Columbia Canada in October this year. A motion to adjourn was made by Tom Melle, and seconded by Wally Binder. The working group meeting adjourned at 3:00 PM. Respectfully submitted
Mike Lau Open Jim Graham WG Chair Vice Chair Secretary
March 21, 2016
Page 10 of 15
Attachment K4.3.1 Power Transformer Subcommittee
Working Group Report Document #: TF Comparison of IEC 60214-1 and IEEE C57.131
Document Title: Tap-Changers
Chair: Craig A. Colopy Vice-Chair Axel Kraemer
Secretary
Current Draft Being Worked On: NA Dated: NA
Meeting Date: 22 March 2015 Time: 13:45 to 15:00
K.9 Attendance: K.10 Members 23
K.11 Guests 52
K.12 Guests Requesting Membership
7
Total 82
Meeting Minutes / Significant Issues / Comments:
1. Meeting was called to order at 1:45 pm, March 22, 2016. 2. Chairman provided the WG a background relating to the work being done to adopt the IEC standard
60214-1 as a dual logo document preserving main technical differences between C57.131 and 60214-1 in an Annex. General opinion from TF is prospects are very good to bring these two standards together as one significant standard covering all industry available tap-changers. This dual logo document establishes a base for a future joint revision by IEEE and IEC members when the stability of IEC 60214-1 has expired. It was published in 2014 with a preliminary stability date of 2019. Annex E of C57.131 is included within the new joint revision of 60214-2, Tap Changer Application Guide.
3. Comparisons and major technical differences were presented for the following clauses: a. Clause 5 - Requirements for on-load tap-changers (Axel Kraemer) b. Clause 7 - Requirements for de-energized tap-changers (Jeremy Sewell)
4. User ID and Password will be provided once more for a link under the Power Transformer SC for
access to clause comparisons, minutes and published tap-changer standards. Published documents of C57.131 -2012 and 60214-1 Ed. 2 are available under an additional secured User ID and Password.
5. Recommendation to be given to Power Transformer Subcommittee for creation of a WG for the purpose of creating a replacement of C57.131-2012 by adoption of IEC 60214-1 with an Annex to include significant technical differences between C57.131 and 60214-1. A PAR will initiated once approval has been established.
Page 11 of 15
6. An initial WG meeting is planned to take place in Vancouver, Spring 2016 7. Meeting closed at 3:00 pm, Mar 22.
Submitted by: Craig A, Colopy Date: 11/03/2015
Page 12 of 15
Attachment K.4.3.2 Power Transformer Subcommittee
Working Group Report
Document #: WG TC Application Guide IEC 60214-2
Document Title: Tap-Changers
Chair: Craig A. Colopy Vice-Chair Axel Kraemer
Secretary
Current Draft Being Worked On: NA Dated: NA
Meeting Date: 22 March 2015 Time: 15:15 to 16:30
K.13 Attendance: K.14 Members 17
K.15 Guests 26
K.16 Guests Requesting Membership
7
Total 50
Meeting Minutes / Significant Issues / Comments:
8. Meeting was called to order at 3:15 pm, March 22, 2016. 9. Chairman provided the WG a background relating to the work being done to adopt the IEC standard
60214-1 as a dual logo document preserving main technical differences between C57.131 and 60214-1 in an Annex. Annex E of C57.131 is included within the latest draft of 60214-2, Tap Changer Application Guide.
10. Minutes from the seventh work session in Venice, February 25th and 26th, along with key changes in latest draft were presented by Axel Kramer.
11. A presentation on “DRM Diagnostic Test Technique for OLTCs” was made by Raka Levi and Marcos Ferreira. It was suggested this presentation be one discussion from a tutorial on OLTC Diagnostic Techniques to be provided by a panel for a future IEEE Transformer Committee meeting group.
12. User ID and Password will be provided once more for a link under the Power Transformer SC for access to drafts, minutes and supporting documentation.
13. Future Work Sessions: a. Nashville, Tennessee, June 6 – 7 2016, Hosted by Dave Geibel, ABB b. Dresden, Germany September 5 – 6 2016 hosted by Axel Kraemer, Reinhausen c. Vancouver, BC Canada, Oct. 27 – 28 2016, IEEE Transformer Committee meeting
14. Meeting closed at 4:30 pm, Mar 22.
Page 13 of 15
Submitted by: Craig A, Colopy Date: 3/22/2016
Page 14 of 15
Attachment K.4.4 Minutes from Guide for the Evaluation and Reconditioning of Liquid Immersed Power Transformers PC57.140 Meeting was held in Atlanta GA, from 3:45-6:00pm March 21st 2016 Chairman: Paul Boman Vice Chairman: Brian Sparling 62 attendees, 26 members were present, we did not achieve a quorum. Motion to accept the agenda as proposed, made by David Sundin, second by Derek Baronowski Minutes from previous meetings were provided to the Working Group in advance but the Minutes were not approved at this time. As this was not an intended to be a full WG meeting, it was to present the status of the proposed document The Chairman provided a summary of the electronic ballot amongst the WG members with approved 43 and disapproved 5 which meets the 2/3’s majority required to move forward to the Subcommittee for a Sponsor Ballot approval. Summary on draft 5 of the Guide: The suggestions made in the previous meeting were incorporated into the latest Working Group Approved draft which included; • Added notes regarding the use of FURAN analysis used in determining the physical sate of the solid insulation. The white paper produced on FURAN’S by a TF chaired by Tom Prevost was added as a reference into Draft 5. • Added notes regarding the use of alternative insulating fluids for retro filling an existing unit, or into a refurbished or rebuilt unit, with respect to its capabilities of the ‘effect of drying’ the solid insulation. Notes were added regarding the owners responsibilities to review on a case by case basis, the potential re-rating of the unit to be retro-filled with a Natural Ester, by the original OEM. The review of some of the figures used in Draft 5, were found to be without suitable references to the original work from which they were included (even though they are copied from the original document) This process is now a necessary step in the final preparation of the document before submission to the SC to seek approval to proceed to a formal ballot. The Working Group was queried on information regarding the Guide figure sources. Gary Hoffman suggested contacting Bill Bartley. Bill Bartley was later contacted confirmed that he drew figures 3 to 6 and Juan Thierry drew figures 7 to 12 with a simple drawing program. This meet the MEC review requirements and develop the Sponsor Ballot Pool. Ballot resolution committee to be made up in preparation for the ballot. Some discussion about Annex A (retro-filling with other fluids), related to potential new fluids under development. Chairman stated that comments can be made during the Sponsor Ballot, but will not be added into the draft already approved by the WG members. A suggestion was made to include the examination of gasket materials to be used or to be determined by the original OEM, if they are suitable for use with alternative insulating fluids. Meeting was adjourn. Respectfully Submitted, Paul Boman, Chairman
Page 15 of 15
Page 1 of 3
Annex L Standards Subcommittee – Unapproved Minutes
March 23, 2016 Atlanta, GA Chair: Jerry Murphy Vice Chair: Kipp Yule Secretary: Daniel Sauer Standards Coordinator: Jim Graham
The Chair, Jerry Murphy opened the meeting calling a show of members to establish quorum which was met.
L.1 Meeting Attendance
The Standards Subcommittee met on Wednesday, March 23, 2016, at 4:32 PM. A show of hands indicated only 17 of 43 members in attendance falling short of quorum at the starting time of the meeting. Quorum was achieved later with arrival of additional members. Overall the attendance roll showed there were 105 attendees, 26 members, 79 guests, including 16 that requested membership upon tabulation of the circulated rosters and will be reviewed for eligibility. Jane Verner moved to approve the fall 2015 minutes with second by Steve Shull; motion was carried with unanimous acclamation approving. Jerry then requested a review of the Agenda; motion was made by Jane Verner and seconded by Steve Shull which was carried unanimously.
L.2 Chair’s Remarks
Jerry stated he was new to this position and hopes to perform adequate to the task that Bill Bartley made look so easy. The next order of business was to move to the Standards Coordinator’s Report – Jim Graham.
L.3 Standards Coordinator’s Report – Jim Graham Jim’s report is on file.
L.4.1 Corrigenda for C57.163 – Jane Verner Jane presented a power point on Power Transformer Capability while under GMD. A Corrigenda was proposed with motion to submit a PAR to develop a corrigenda to C57.163 to clarify the derivation of the tie plate temperatures shown in Figure 13. Moved by: Jane Verner Seconded by: Gary Hoffman Carried: Unanimously.
L.4.2 Continuous Revision of C57.12.00 – Steve Snyder The purpose of this WG is to compile all the work being done in various TF/WG/SC’s for inclusion in the continuous revision of C57.12.00 in a consistent manner. This WG coordinates efforts with the companion Standard C57.12.90 so that they publish together.
The first proofs (copyedited and formatted version) of the approved standard C57.12.00-2015 were emailed to Steve on March 16. It is now up to Steve for a critical review before publication to ensure no unintended changes have occurred to the document. This should be completed within the next 2 weeks.
The standard is good for 10 years, but is under continuous revision and will be next balloted when sufficient new material is available.
All the unresolved issues from the ballot have been sent to the various subcommittee chairs so they may take this on as future work in the working groups under their purview.
Respectfully submitted by Steven L. Snyder, WG Chair, on March 23, 2016
L.4.3 Continuous Revision of C57.12.90 – Steve Antosz
The purpose of the WG is to keep track of the work being done in various TF/WG/SC’s for inclusion in the continuous revision of C57.12.90 in a consistent manner. This is a working group by committee. There are no meetings held.
Summary The new Standard C57.12.90-2015 was approved by the Standards Board on December 15, 2015. It was published on March 11, 2016.
Status Since this is a continuous revision document, there continues to be ongoing work in the various Task Forces, and new material has already been submitted for the next revision. Steve plans to immediately take out a new PAR.
Steve requested the three Subcommittee Chairs from Dielectric Test, Performance Characteristics, and Insulation Life to rename their 12.90 continuous revision Working Groups to Task Forces, since calling them a WG is incorrect. A WG needs a PAR and those groups do not have a PAR. The PAR exists (will exist) in the Standards Subcommittee only. Therefore they are really Task Forces.
Respectfully submitted by Stephen Antosz, WG Chair, on March 23, 2015
Motion to proceed with a new PAR for C57.12.90; moved by Steve Antosz, Seconded by Don Platts; carried unanimously.
Motion made by Steve Antosz, “To change the status on the continuous revision PCS & Di-Electric Test groups from WG to TF for C57.12.90 & C57.12.00”; seconded by Don Platts; carried unanimously.
Steve Antosz informed the Standards SC that Steve Antosz and Steve Snyder will present a tutorial at Vancouver on the new C57.12.00 & C57.12.90 documents.
L.4.4 Corrigenda for C57.12.70 – Steve Shull
Steve Shull called the meeting to order and welcomed everyone to the first working group meeting for the Corrigenda of C57.12.70. The purpose of the Corrigenda was to review the complete annex and in particular to correct diagrams with errors. Since this was the first working group meeting, any attendees desiring membership needed to indicate such on the rosters being circulated at today’s meeting.
Steve presented the agenda and the WG approved by unanimous consent.
Annex L
Page 3 of 3
Steve informed the WG that the PAR for Corrigendum 1: Correction of Annex A was approved at the January 26, 2016 NESCOM meeting.
Steve demonstrated how the errors were found and showed the one of the proposed corrections. Paper copies of the preliminarily review document were passed out to all 17 attendees. Lee Matthews made a motion for all members and guests to take the revised Annex A document and review it for correctness before the next meeting. The motion was seconded by Said Hachichi. The WG passed the motion with unanimous consent.
The next WG meeting will be in Vancouver, BC, Canada, in October 23-27.
The meeting was adjourned at 4:10 pm by motion from Charles Sweetser, seconded by Lee Matthews and passed by unanimous proclamation.
Respectfully submitted by Steve Shull, WG Chair, on March 23, 2016.
L.4.5 TASK FORCE for Comparison of IEEE & IEC Standards for Cross Reference
The task for did not meet at this meeting.
Respectfully submitted by Vinay Mehrotra on November 4, 2015
L.5 Old Business
• C57.12.80 will be preparing a PAR for a Corrigendum to look at the definition of a distribution transformer.
• Kipp Yule, chair of a task force to develop a white paper that will capture the practice of WHAT GOES WHERE gave a presentation of approach, and the current version of the WGW Chart of the Organization & Hierarchy of IEEE Transformer Standards and Guides. Kipp asked the member chairs for additional examples to be included in the appendix. Don Platts made a motion to have these documents circulated to the SC chairs and the Standards SC for review and approval to the Standards SC to verify that the work is complete; seconded by: Craig Colopy; carried: unanimously.
• Steve Antosz chair of a task force to document the “unwritten rules” concerning C57.12.00 & 12.90; and how we can improve the process. Steve reported that he is working on changing WG to TF as they apply to this work. This will be reported in the tutorial.
L.6 New Business Joe Watson brings before the Standards SC that the Power Transformer SC will sponsor a tutorial regarding field testing of OLTCs, should this be jointly sponsored by the Standards SC? Should a TF/WG be established to look at generating a field test guide or standard for OLTCs? The Standards SC approves of the Power Transformer SC moving forward with this tutorial and in the future if a TF is needed to look at a field test guide for OLTCs we will work with Jane Verner on the (continuous) revision or amendment of C57.152.
L.7 Adjournment
The meeting and was adjourned by the Chair without objection at 5:46 p.m.
Respectfully submitted by Daniel M Sauer, Standards SC Secretary
Page 1 of 9
Annex M Underground Transformers & Network Protectors Subcommittee
March 23, 201 Atlanta, Georgia
Chair: Dan Mulkey Vice Chair: George Payerle
M.1 Meeting Administration
Introductions – The meeting was called to order at 11:00 AM in the Atlanta 4-5 rooms of the Sheraton Hotel in Atlanta, Georgia. Introductions were made and sign-in sheets were routed.
Quorum – The members were listed on the screen and by a show of hands, it was determined that there was a quorum with 16 of the 18 members in attendance.
Approval of Minutes – The minutes from the Fall 2015 meeting in Memphis, Tennessee were approved with the changes noted in the working group reports below. They were motioned for approval by Said Hachichi and seconded by Bill Wimmer. The subcommittee approved these without opposition.
Members and Guests --There were 16 members and 20 guests in attendance. Their names can be found in the AM system. Six guests requested membership, and post meeting John Crotty, Robert Stinson, Joshua Verdell, Mike Thibault, David Walker, and David Blew were approved as members.
The chairman, Dan Mulkey, mentioned that work is continuing on the RFID meeting check in system. He also said that he had attended all of the working group meetings in the UTNP subcommittee and that all seem to be functioning very well.
M.2 Working Group and Task Force Reports
M.2.1 C57.12.23 Working Group Report – Single-Phase Submersible Transformer
Alan Traut, Chairman, Adam Bromley, vice-chair. Revision due date: 3/19/2019 PAR Approval Date: 8/21/2014 PAR Expiration Date: 12/31/2018
Introductions – The meeting was called to order and everyone was asked to introduce themselves. Rosters were sent around. Quorum – We had 49 attendees, 27 members (out of 32), 22 guests with 8 of those requesting membership (we will check attendance records), which gave us enough members to establish a quorum. Approval of Agenda – Motion: Said Hachichi, Second: Mike Shannon, unanimous Approval of Minutes – Motion: Justin Pezzin, Second: Fred Friend, unanimous Chair Report – Al talked about when the PAR expires and how long we have to complete our work. PAR expires December 31, 2018. 10-year life cycle of the standard is December 31, 2019. Al mentioned that we should be fine to meet that deadline. We would like to send to ballot in the fall meeting of 2017.
Annex M
Page 2 of 9
Old Business Al reviewed the results from the survey regarding the tank dimensions for various kVA sizes. Survey questions and results are as follows: Are these overall diameters appropriate for the manhole sizes in use? What minimum clearance is required to lower a unit through a 36" manhole? Are there differences if a unit is loop feed vs. radial feed? Should the dimensions be based on kVA and/or voltage (BIL)? If so, please provide suggestions. If you have the equivalent requirements in your user specifications, eg, clause, table, drawings, please provide in your response to this survey. 14 responses received with 4 abstaining Manufacturer response that 36” max overall diameter is achievable with 250kVA but height would be 60”. Also suggest a table of max dimensions by kVA Manufacturer response that 39” max overall diameter is achievable. User response that 35” should be limit on 250kVA to fit 36” manhole. Also suggest overall height limit of 66” User response supports 36” max (42” manhole) for 250kVA and 58” height limit. User response by kVA range:
• 25-100kVA, 29” max diameter, 46” max height • 101-167kVA, 31” max diameter, 47” max height • 250kVA, 35” max diameter
User response that there should be one max diameter and height for all units, not by kVA or voltage. User response that 250kVA units are installed in a 48” enclosure and 36” limit is ok. Max dimensions should be based on kVA alone. Tom Holifield brought up the fact that 39” is the maximum number; why would we go less when a lot of utilities have manholes at 39-40”. Giuseppe, Taz, Dan, and Brian all discussed why we would specify 35” vs. 39” for 250 kVA units. Giuseppe Termini made a motion to make the maximum diameter 36”, Alex Macias seconded. 7 approve. 9 opposed. 4 abstentions. Motion fails. Tom Holifield made a motion to change maximum dimensions 36” to 39” for 250 kVA units. Jermaine Clonts seconded. 15 approve. 3 oppose. 4 abstentions. Motion is approved. Giuseppe mentioned utilities’ challenges with existing infrastructure and asked why we have a maximum diameter that is different for 167 kVA and 250 kVA. Dan Mulkey made a motion to add language to first sentence that states 36” max diameter for enclosure opening is only for 167 kVA and below and to add maximum of 42” for 250 kVA. Ron Stahara seconded. 19 approve. 0 opposed. Motion approved. New language from approved motions is as follows: Construction of the units shall be such that they can be lifted and lowered into place in a suitably designed and constructed enclosure having a minimum diameter of 910 mm (36 in) for 167kVA and below, or 1067 mm (42 in) for 250kVA To allow for cabling space and proper air flow for cooling, the transformers covered by this standard shall not have overall diameters in excess of 760 mm (30 in) for sizes 100 kVA and smaller, or overall diameters in excess of 840 mm (33 in) for 167 kVA, or overall diameters in excess of 990 mm (39 in) for 250 kVA. Low Voltage terminals task force (section 7.2.2). Jermaine discussed the recommendations made by the task force including the addition of voltage ratings. We could add a note to the table that tells the user the
Annex M
Page 3 of 9
H spade can be used for any of the kVA sizes, when specified. Al suggested that we put this into the draft so that we can review and vote on it at the next meeting. The table as presented is shown below:
Secondary terminals
Low-Voltage kVA
Ratings
Ratings (V)
2/0 AWG Copper Cable
120/240, 240/120,
240 25 - 37.5
240/480, 480/240,
480 25 - 75
120 -
*The connection between the secondary bushings and the cable shall be fully
insulated and sealed to prevent the entrance of moisture.
277, 347 25 - 50
600 25 - 100
4/0 AWG Copper Cable
120/240, 240/120,
240 50
240/480, 480/240,
480 100
120 25
277 -
347 75
600 -
500 kcmil copper
120/240, 240/120, 240, 277
75-100
240/480, 480/240
,480 167
120 37.5 – 50
240, 277 75-100
347 100
600 167-250
H Spade
120/240, 240/120, 240, 277,
347
167-250
240/480, 480/240,
480 250
120 75-167
600 -
Tank materials – we wanted to look at requirements added to 12.24 and see if we want to include similar language in 12.23. Dan Mulkey suggested that we can’t make a tank with copper bearing steel with
Annex M
Page 4 of 9
sufficient thickness to survive in the submersible environment. Dan made a motion to adopt the three conditions included in 12.24 but that we change copper bearing steel minimum requirement to 409 SS. Second – Alex Macias. Mike Hardin suggested that we add “as a minimum” to the first sentence. Brian asked if that is clear. Discussion led to an amended motion for material requirements: add other steel materials to first sentence and make all vault environments part of the same paragraph. Amendments to the motion and the motion approved unanimously. This motion puts the following language into the draft: Material requirements The transformer tank, including walls, cover, bottom, and auxiliary coolers shall be constructed of 409, 304L or 316L stainless steel. For transformers continuously submerged, it is recommended the user installs cathodic protection or specifies 304L or 316L stainless steel. For transformers subjected to cycling between wet and dry conditions, or subject to highly corrosive mineral content, it is recommended the user installs cathodic protection or specifies 316L stainless steel. The group ran out of time and had to table the remaining agenda items. Adjourned at 10:45 am. We will meet at the Fall 2016 meeting in Vancouver, Canada.
M.2.2 C57.12.24 Working Group Report – Three-Phase Submersible Transformers
Giuseppe Termini, Chairman; George Payerle secretary Revision due date: 6/17/2019 PAR Approval Date: 11/9/2011 PAR Expiration Date: 12/31/2017
The meeting was called to order at 9:30 AM, March 21, 2016 in the Georgia 2,3 Room of the Sheraton Atlanta Hotel in Atlanta, GA. Introductions were made and an agenda was presented. The meeting was attended by 24 members and 41 guests. Membership stands at 25, and with 24 members present, there was a quorum. Six (6) guests requested membership. The Chairman stated that attendance at 3 consecutive meetings was necessary for membership. Any member missing 2 meetings in a row would be dropped unless the Chairman was notified with a valid justification for missing the meetings.
George Payerle acted as recording secretary. Minutes from the previous meeting in Memphis, TN were presented. Al Traut a motion to approve the minutes, Brian Klaponski seconded it, and the motion was approved unanimously.
The Chairman stated that the PAR has been extended to two (2) years and it will expire on December 31, 2017. However, the Chairman would like to complete the standard revision work within one year. The results of the balloting process were discussed. There were 89 interested individuals in the ballot group of which 81 casted a vote; this represents 91% participation. We received 75 affirmative votes, 4 negative votes with comments and 2 abstentions. This represents 94% approval rate. Fifty-two (52) comments received of which 16 must be satisfied. Prior to this meeting, Corey Morgan led the effort to incorporate the comments received from the balloting process into Draft D6.
Matt Ceglia stated that when Draft 6 is submitted for re-circulation, it will not require another Mandatory Editorial Coordination (MEC) review. The editorial changes will be reviewed by the IEEE editorial review board prior to publishing the final approved standard. The rest of the meeting was dedicated in reviewing the comments incorporated in Draft 6 with the following results:
Annex M
Page 5 of 9
• The revision year of the referenced standards will be removed except for C57.12.00 since specific sections of this standard are referenced.
• Section 5.2 - Rick Marek stated that C57.154, in addition to provide the requirements for transformers operating at elevated temperatures, it also provides the insulation classes for distribution transformers and it is the only standard where insulating classes are actually defined. It was agreed to retain the changes in this sections as incorporated.
• Section 6.2 Reference Temperature - Al Traut made a motion to reverse the technical change that had been made and revert back to state that the reference temperature shall be corrected to 85 degrees C. Cory seconded the motion and it was approved unanimously.
• Figures 1 and 2 -- The metric and English symbols are not shown in the header of the table in Figure 2 as shown in Figure 1. Also, there was a discussion on whether the metric values in the header of the table in Figure 1 should be in millimeters instead of meters. Matt Ceglia stated that it was acceptable under the IEEE metrification rules to show these values in meters. It was agreed to retain the values in meters as shown in Figure 1 and add the metric and English values in millimeters and inches respectively, in the header of the table in Figure 2.
• Section 7.5.4 - Mike Thibault made a motion to exclude aluminum material by adding the words: “Aluminum is not acceptable” between the first and second sentences of this section. Dan Mulkey seconded the motion and it was approved unanimously.
• Section 7.1 – Brian Klaponski stated that although the changes from “mineral oil” to “insulating fluids” throughout the document were acceptable, however, the intent of this standard was to use mineral oil as the basis for insulating fluid. The Chairman suggested to add the words ‘Unless otherwise specified, insulated liquid shall be mineral oil” at the end of the first paragraph of Section 7.1 to satisfy Brian’s comment. A motion was made by Dan Mulkey to add the suggested words. Kent Miller seconded the motion and it was approved unanimously.
Said Hachichi made a motion to approve all the changes in Draft 6 as discussed at the meeting, and as modified above. Cory seconded the motion and it was approved unanimously.
The Chairman stated that Draft D6, as modified at this meeting, will be submitted for recirculation and re-balloted.
The meeting was adjourned at 10:45 AM. The next meeting will be on October 2016 in Vancouver, BC, Canada.
M.2.3 C57.12.40 Working Group Report – Secondary Network Transformers
Brian Klaponski, Chairman; Giuseppe Termini, Secretary Revision due date: 12/31/2021 PAR Approval Date: 8/30/2012 PAR Expiration Date: 12/31/2016
The WG met on Tuesday, March 22, 2016 at 11:00 am with 18 members and 28 guests. One (1) guest requested membership.
An agenda was presented and approved; and introductions were made.
Annex M
Page 6 of 9
The minutes of the November 3, 2015, meeting in Memphis, TN were reviewed. George Payerle made a motion to approve the Meeting Minutes. Tas Taousakis seconded the motion and the minutes were approved unanimously.
The Chair briefly summarized the items in the Meeting Minutes from Memphis. Three individuals requested membership at the last meeting but only Will Elliott was added to the membership since he meet the criteria for membership. The Chair stated that because of the addition of: a) Figure 2 and b) the mathematical equation in Annex B, the balloting of the draft was postponed pending the approval of the addition of these two technical items by this WG.
The Chair also stated that because the draft was not submitted for balloting, a request for a PAR extension will be submitted to allow time to ballot the standard and resolve any comments received from the balloting process.
Larry Dix expanded on the derivation of the equation in Annex B. He stated that the equation is informative for the end users, and is an approximation of the melting point of the bus bar. It was suggested to provide the reference/source of the equation in the text of Annex B. Larry stated that he will provide the reference to the Chair. Jeremy Sewell made a motion to approve the addition of the equation in Annex B. Mark Faulkner seconded and the motion was approved unanimously.
The Chair explained the rational for adding Figure 2 to the standard. The Figure adds details on the preferred and alternative location of the primary bushings. Cory Morgan made a motion to approve the addition of Figure 2. Tas Taousakis seconded the motion and was approved unanimously.
Bob Kinner made a presentation on the difference between 304L and 316L stainless steel. The presentation is summarized below:
“The difference between 304L and 316L is 2% of the chromium content is upgraded to molybdenum. Molybdenum is a chromium group metal with lower susceptibility to forming water soluble chlorides. In turn, it has an improved resistance to saltwater. In terms of welding and stress cracks, there is no advantage of one alloy over the other. To protect against welding errors, look at the welding process. Low carbon alloys mitigate carbide precipitation. Carbide precipitation removes chromium from the alloy – chromium is what makes these steels “stainless”. Austenite tends to have a large grain size, which causes a lot of internal stresses along the welds. Annealing is another way reduce internal stresses, which later lead to cracking, but this may be impractical. Welding with a filler metal containing ferrite forming alloying agents can reduce stresses along the weld lines. Ferritic grains fill the gaps between austenitic grains. Stainless 321 contains 0.4% titanium which will help with this. 309Cb contains 0.8% columbium. Please check with weld wire suppliers for material compatibility.”
The meeting was adjourned at 12:10 pm with the next meeting set for Vancouver, Canada in October 2016.
Annex M
Page 7 of 9
M.2.4 C57.12.44 Working Group Report – Secondary Network Protectors
Bill Wimmer, Chairman, Mark Faulkner, Secretary Revision due date: 12/31/2024 PAR Approval Date: 3/26/2015 PAR Expiration Date: 12/31/2019
The meeting was called to order at 1:45 PM, on Monday, March 21, 2016 in the Georgia 2, 3 Room of the Sheraton Hotel. ( * )A total of 20 individuals attended the meeting. Membership stands at 9 members; a quorum was met on people in attendance (numerous late arrivals) Mark Faulkner presented the meeting agenda to the WG for review and acceptance. Ed Bertolini motioned to approve the meeting agenda as presented, Dan Mulkey, seconded the motion, the motion was approved unanimously. New Business Continued review of comments from Lee Welch: Discussion on external sand filled fuses / referred to Table B.4 pictures Discussion held on including external fuses and housing Three member users are currently specifying external fusing
o George Power (Lee Welch) o CenterPoint Energy (Alex Macias) o Eversource (Cory Morgan)
Individual housing vs one housing for all three fuses o Decision to specify individual housings only
Mounting provisions Placement fuses Spades exiting the housing Clearance requirements between for individual housing, external spades, and fuse within the housing
o Mulkey made reference to Table B.3 / clearances shall be reviewed Noted that a number of end users are utilizing external fusing
o Eaton (Mark F) and Richards (Edward B)will get together to find min. dimensional requirements for publishing in the standard
o Also questioned other type of external fusing available o Lead alloy, copper, KPR, Bussman, 5000A, 4000A, etc...
Pressurizing the fuse enclosure was discussed and deemed necessary. o External fusing housing pressurized independent of network or o External fusing housing pressurized thru vent hole
Table 4 AC voltage ratings:
o Why have the 500 rating? o Eaton (Mark F) stated they test all at 600 o Richards to verify what voltage they test o Results will determine the elimination of 250 and 500
Remote Racking
- Lee (GP) indicated that an inspection window or some means be included in the standard o To verify visible break of contacts
Annex M
Page 8 of 9
o Design in place that do not require the door to be open Sections: 10.5.4.6. / 10.5.4.7 / 105.4.8 / 10.5.4.8 / 10.5.4.9
o A discussion was held concerning the door hinges placement o Submersible vs. non submersible o Is the operating handle the determining factor o It was decided to not change any section
10.5.14 Spare auxiliary contacts
o - Request made to define “dry contact” o - include a means to provide contact status o - Include a means to provide SCADA features in relation with remote racking
Note: It was suggested that a new section be created specific to remote racking Under a) Eaton (Mark) to review and the determine the need to remove or keep in standard as part of the high voltage interlock transformer provisions Under b) one contact to be closed, as known as an “a” ( , remove comma) contact when the network protector is open. This is to be an available “dry” contact. Under c) one contact to be closed, as known as an “b” ( , remove comma) contact when the network protector is open. This is to be an available “dry” contact. Next meeting:
• Vancouver, Canada
M.3 Old Business
M.3.1 SC Scope
The subcommittee voted between meetings to change the scope of this group to: Underground Transformers and Secondary Network Equipment Subcommittee (UGTSN) The Underground Transformers and Secondary Network Equipment Subcommittee shall be responsible for the following:
a) Studying and reviewing the engineering aspects of: • Secondary network protectors • Liquid filled and dry-type secondary network transformers including pad-mount distribution
transformers that incorporate or provide for a network protector or a network grounding switch • Underground distribution transformers, except for pad-mount transformers. This includes vault,
submersible, and subway type distribution transformers. b) Developing and maintaining related standards, recommended practices, and guides for such products c) Coordinating with other technical committees, groups, societies, and associations as required
However, the change has not been approved yet. Hopefully it will be by the next meeting.
At the last meeting, Dan stated that we requested the PAR to be extended to 5 years and have heard nothing. The standards board’s last meeting of the year typically has a deadline for submission that occurs before the fall Transformers Committee meeting so we lose a half year automatically. It is a given that every ballot will need a recirculation. Balloting and recirculation takes a year or longer. So you really have 3 years at most, or 6 meetings to get your work done. Currently there are 4 projects that are asking for PAR extensions that would not need them if PARs lasted 5 years.
Annex M
Page 9 of 9
M.4 New Business
M.4.1 none
M.5 Adjournment
The meeting was adjourned at 12:30 PM with the next meeting set for Vancouver, BC, Canada on October 26, 2016.
APPENDIX 1
Meeting Schedule
page 1
INITIAL ISSUE - February 4
IEEE/PES TRANSFORMERS COMMITTEE www.transformerscommittee.org Spring 2016 Meeting; March 20-24
Hosted by Power Partners, Inc.
Sheraton Atlanta Hotel; Atlanta, Georgia USA See Page 5 for a key to abbreviations.
> 8:00 am - 5:00 pm > IEC/IEEE HVDC Converter Transformers HVDC U. Radbrandt 14 US Suite #123
6:15 pm to 10:30 pm Early Bird Event: "Agatha's, A Taste of Mystery!", interactive dinner theater (www.agathas.com) -- Advance on-line registration necessary. Limited attendance. Will sell-out early! See flyer for details. -- Meet in hotel lobby at 6:15 pm. We will walk together to Agatha's (5-6 minute walk). Return ~10:30 pm.
Sunday, March 20
> 8:00 am - 12:00 pm IEC/IEEE HVDC Converter Transformers HVDC U. Radbrandt 14 US Suite #123
9:00 am - 1:30 pm Technical Tour: Hitachi HVB Circuit Breaker Facility, Suwanee, Georgia Facility. By Invitation Only. -- Bus departs front of hotel at 9:00 am; returns by 1:30 pm. Morning refreshments at factory; lunch after tour. -- Indicate interest to attend tour during on-line meeting registration, or ... contact Ms. Jackie Burtle at<[email protected]> or at +1.770.495.1755 ext 130.
Monday, March 21 -- Monday Breaks Sponsored by SPX Transformer Solutions, Inc. ** 7:00 am - 5:00 pm Meeting Registration Capital Pre-function
7:00 am - 7:50 am Newcomers Orientation -- Breakfast Meeting; arrive early! -- Newcomers & Guests are encouraged to attend!
S. McNelly 80 CL S2 (with buffet)
Atlanta 1,2,3 (Level 1)
7:00 am - 7:50 am Distribution SC Leaders Coordination -- Closed breakfast meeting, by invitation only
S. Shull 16 BD Atlanta 5 (Level 1)
7:00 am - 8:00 am Breakfast - Attendees (no spouses/companions please) 272 RT (8/tbl) Grand Ballroom AB (Level 3)
8:00 am - 9:30 am Breakfast - Spouses/Companions (no meeting attendees please) -- Fandangles Restaurant (Level 3)
9:15 am - 4:00 pm Spouses/Companions Tour: "What Dreams Are Made Of"; MLK Memorial, J. Carter Library, etc. With lunch. -- Advance registration required. Limited attendance. See flyer for details. -- Bus departs at front of hotel at 9:15 am, and returns by 4:00 pm.
8:00 am - 9:15 am > Opening Session S. Antosz -- All attendees are encouraged to attend -- See separate document for meeting agenda -- Attendance recorded as eligibility for Committee membership
>550 MX S1
Capital Ballroom (Level 1)
9:15 am - 9:30 am Break (beverages only) Georgia & Capital Pre-function
** Contact Ed Smith ([email protected]) if you are interested in sponsoring a coffee-break at a future meeting.
page 2
DATE/TIME
ACTIVITY
SUB-
COM
ACTIVITY
CHAIR
ROOM
CAP/ARR/AV
MEETING
ROOM
Monday, March 21 (continued)
9:30 am - 10:45 am WG Thermal Evaluation of Insulation Systems, Dry Type C57.12.60
Dry C. Ballard 60 MX Georgia 4,5
9:30 am - 10:45 am WG Submersible Transf. C57.12.24 UTNP G. Termini 80 MX Georgia 2,3
9:30 am - 10:45 am WG External Dielectric Clearances DiTests E. Davis 120 MX S2 Atlanta 1,2,3
9:30 am - 10:45 am WG Tertiary/Stabilizing Windings PC57.158
PCS E. Betancourt 185 MX S3 Capital South
9:30 am - 10:45 am TF Consolidation of Oil Guides IF T. Prevost 185 MX S3 Capital Center
9:30 am - 10:45 am -- 185 MX S3 Capital North
10:45 am - 11:00 am Break (beverages only) Georgia & Capital Pre-function
11:00 am - 12:15 pm WG Ventilated Dry Type C57.12.51 Dry S. Som 60 MX Georgia 4,5
11:00 am - 12:15 pm WG PD Acoustic Detection C57.127 DiTests D. Gross 80 MX Georgia 2,3
11:00 am - 12:15 pm WG Overhead Distr. Transf. C57.12.20 Dist A. Traut 120 MX S2 Atlanta 1,2,3
11:00 am - 12:15 pm WG Control Cabinets C57.148 Power J. Watson 185 MX S3 Capital South
11:00 am - 12:15 pm WG Moisture in Insulation PC57.162 IL T. Prevost 185 MX S3 Capital Center
11:00 am - 12:15 pm WG PCS Rev. to Test Code C57.12.90 PCS M. Perkins 185 MX S3 Capital North
12:15 pm - 1:30 pm Lunch Meeting: Standards Development Review J. Graham 238 RT (7/tbl) Grand Ballroom AB
-- Everyone welcome to attend. All SC/WG/TF leaders are highly encouraged to attend. (Level 3)
-- Doors open ~12:00 pm. Come early, get a good seat, and start eating. -- Advance registration necessary. No paper tickets. Admission verified with namebadge at the door.
1:45 pm - 3:00 pm WG Dry Type Gen. Require. C57.12.01 Dry C. Ballard 60 MX Georgia 4,5
1:45 pm - 3:00 pm WG Sec. Network Protectors C57.12.44 UTNP M. Faulkner 80 MX Georgia 2,3
1:45 pm - 3:00 pm WG 1-ph Padmount Dist Transf. C57.12.38 Dist A. Ghafourian 120 MX S2 Atlanta 1,2,3
1:45 pm - 3:00 pm TF Thru-Fault Current Duration PC57.109 PCS V. Mehrotra 185 MX S3 Capital South
1:45 pm - 3:00 pm WG Installation of Power Transf. C57.93 Power M. Lau 185 MX S3 Capital Center
1:45 pm - 3:00 pm TF Audible Sound Revision to Test Code PCS R. Girgis 185 MX S3 Capital North
3:00 pm - 3:15 pm Break (beverages and treats) Georgia & Capital Pre-function
3:15 pm - 4:30 pm WG Milli-amp Current Transf. C57.13.7 IT H. Alton 60 MX Georgia 4,5
4:45 pm - 6:00 pm WG Life Extension C57.140 Power P. Boman 185 MX S3 Capital Center
4:45 pm - 6:00 pm WG PCS Revisions to C57.12.00 PCS T. Ansari 185 MX S3 Capital North
No Technical Tours or Social Events Planned
page 3
DATE/TIME
ACTIVITY
SUB-
COM
ACTIVITY
CHAIR
ROOM
CAP/ARR/AV
MEETING
ROOM
Tuesday, March 22 -- Tuesday Breaks Sponsored by Delta Star Inc. **
7:00 am - 12:00 pm Meeting Registration Capital Pre-function
7:00 am - 8:00 am Breakfast - Attendees (no spouses/companions please) 272 RT (8/tbl) Grand Ballroom AB
8:00 am - 9:30 am Breakfast - Spouses/Companions (no meeting attendees please) -- Fandangles Rest.
7:00 am - 7:50 am EL&P Delegation (end-users only please) -- Breakfast Meeting; arrive early
J. Murphy 36 CL (with buffet)
Georgia 6 (Level 1)
9:15 am - 4:00 pm Spouses/Companions Tour: "Atlanta's Must See Tour"; World of Coca-Cola, CNN Studio, etc. With lunch. -- Advance registration required. Limited attendance. See flyer for details. -- Bus departs at front of hotel at 9:15 am, and returns by 4:00 pm.
WG Functional Life Tests, De-energized Tap Changers (DETC) PC57.157
Power Work complete. Will not meet.
8:00 am - 9:15 am WG Station Service Voltage Transformers IT D. Wallace 60 MX Georgia 4,5
8:00 am - 9:15 am TF Limits for Winding Insulation PF/Resistance
DiTests S. Tarlapally 80 MX Georgia 2,3
8:00 am - 9:15 am WG Enclosure Integrity C57.12.28, C57.12.29, C57.12.31, C57.12.32
Dist D. Mulkey 120 MX S2 Atlanta 1,2,3
8:00 am - 9:15 am TF Composite Bushings Bush J. Graham 185 MX S3 Capital South
8:00 am - 9:15 am WG PD Detection in Dry Type Transformers C57.124
Dry T. Prevost 185 MX S3 Capital Center
8:00 am - 9:15 am WG Revision to C57.12.10 Power G. Hoffman 185 MX S3 Capital North
9:15 am - 9:30 am Break (beverages only) Georgia & Capital Pre-function
TF Committee History Mtgs Will not meet at this meeting.
9:30 am - 10:45 am WG Tests for Instrument Transf. C57.13.5 IT P. Riffon 60 MX Georgia 4,5
9:30 am - 10:45 am WG 1-Ph Submersible Transf. C57.12.23 UTNP A. Traut 80 MX Georgia 2,3
9:30 am - 10:45 am -- 120 MX S2 Atlanta 1,2,3
9:30 am - 10:45 am WG GSU Bushings PC57.19.04 Bush S. Digby 185 MX S3 Capital South
9:30 am - 10:45 am WG Shunt Reactors C57.21 PCS S. Som 185 MX S3 Capital Center
9:30 am - 10:45 am WG Wind Turbine Transf. P60076-16 PCS D. Buckmaster 185 MX S3 Capital North
10:45 am - 11:00 am Break (beverages only) Georgia & Capital Pre-function
WG Phase Shift Transf. 60076-57-1202 Power Will not meet. Will update status in SC meeting.
11:00 am - 12:15 pm TF PLC Caps & CCVTs (currently C93.1) IT Z. Roman 60 MX Georgia 4,5
11:00 am - 12:15 pm WG Liquid-immersed Secondary Network Transformers C57.12.40
UTNP B. Klaponski 80 MX Georgia 2,3
11:00 am - 12:15 pm WG Semiconductor Power Rectifier Transformers C57.18.10
PCS S. Kennedy 120 MX S2 Atlanta 1,2,3
11:00 am - 12:15 pm WG Distrib. Transf. Bushings PC57.19.02 Bush S. Shull 185 MX S3 Capital South
11:00 am - 12:15 pm -- 185 MX S3 Capital Center
11:00 am - 12:15 pm WG Loss Evaluation Guide C57.120 PCS R. Verdolin 185 MX S3 Capital North
12:15 pm - 1:30 pm Awards Luncheon D. Platts 238 RT (7/tbl) Grand Ballroom AB
-- Doors open ~12:00 pm. Come early, get a good seat, and start eating. (Level 3)
-- Advance registration necessary. No paper tickets. Admission verified with namebadge at the door.
All meeting attendees are encouraged attend. It’s a great way to show your appreciation and help us recognize our accomplishments.
1:45 pm - 3:00 pm WG 3-ph Transf. Connections PC57.105 PCS A. Bromley 60 MX Georgia 4,5
1:45 pm - 3:00 pm TF Tap-Changer C57.131 / 60214-1 Power C. Colopy 80 MX Georgia 2,3
1:45 pm - 3:00 pm WG Distr. Substation Transf. C57.12.36 Dist J. Murphy 120 MX S2 Atlanta 1,2,3
1:45 pm - 3:00 pm -- 185 MX S3 Capital South
1:45 pm - 3:00 pm WG Revision to Low Frequency Tests DiTests B. Poulin 185 MX S3 Capital Center
1:45 pm - 3:00 pm WG DPV Grid Transformers PC57.159 PCS H. Shertukde 185 MX S3 Capital North
3:00 pm - 3:15 pm Break (beverages and Pretzels!) Georgia & Capital Pre-function
** Contact Ed Smith ([email protected]) if you are interested in sponsoring a coffee-break at a future meeting.
page 4
DATE/TIME
ACTIVITY
SUB-
COM
ACTIVITY
CHAIR
ROOM
CAP/ARR/AV
MEETING
ROOM
Tuesday, March 22 (continued)
WG Test Data Reporting C57.12.37 Dist Work complete. Will not meet.
3:15 pm - 4:30 pm -- 60 MX Georgia 4,5
3:15 pm - 4:30 pm WG Tap-Changer Applic. Guide 60214-2 Power C. Colopy 80 MX Georgia 2,3
3:15 pm - 4:30 pm Standard Terminal Markings C57.12.70 Stds S. Shull 120 MX S2 Atlanta 1,2,3
3:15 pm - 4:30 pm WG Std Require for Bushings C57.19.01 Bush S. Zhang 185 MX S3 Capital South
3:15 pm - 4:30 pm WG Application of High-Temp Insulation Materials, IEEE P-1276
TF for Cross Reference of IEEE to IEC Stds Will not meet at this meeting.
4:45 pm - 6:00 pm WG Dry Type Test Code C57.12.91 Dry D. Foster 60 MX Georgia 4,5
4:45 pm - 6:00 pm -- 80 MX Georgia 2,3
4:45 pm - 6:00 pm WG Tank Pressure Coordinat. C57.12.39 Dist C. Gaytan 120 MX S2 Atlanta 1,2,3
4:45 pm - 6:00 pm TF Short Circuit Design Criteria PCS D. Buckmaster 185 MX S3 Capital South
4:45 pm - 6:00 pm WG Revision to Gas Guide C57.104 IF R. Ladroga 185 MX S3 Capital Center
4:45 pm - 6:00 pm WG Revisions to Impulse Test Sections of C57.12.00 and C57.12.90
DiTests P. Riffon 185 MX S3 Capital North
No Technical Tours or Social Events Planned
Wednesday, March 23 -- Wednesday Breaks Sponsored by DuPont **
No Meeting Registration, No Technical Tours, No Spouse/Companion Tours
7:00 am - 8:00 am Breakfast - Attendees (no spouses/companions please) 272 RT (8/tbl) Grand Ballroom AB
8:00 am - 9:30 am Breakfast - Spouses/Companions (no meeting attendees please) -- Fandangles Rest.
7:00 am - 7:50 am SC Meetings Planning Mtgs G. Anderson 24 CL (with buffet)
Georgia 6 (Level 1)
7:00 am - 8:30 am IEC TC-14 Technical Advisory Group ++ -- Breakfast Meeting; arrive early -- All interested individuals welcome
P. Hopkinson 80 CL S2 (with buffet)
Atlanta 1,2,3
8:00 am - 9:15 am SC Instrument Transformers IT R. McTaggart 80 MX S2 Atlanta 4,5
8:00 am - 9:15 am SC Insulation Life IL S. Kennedy 350 MX S3 Capital Ballroom
9:15 am - 9:30 am Break (beverages only) Capital Pre-function
9:30 am - 10:45 am SC Bushings Bush P. Zhao 180 MX S3 Atlanta 1,2,3
9:30 am - 10:45 am SC Distribution Transformers Dist S. Shull 350 MX S3 Capital Ballroom
10:45 am - 11:00 am Break (beverages only) Capital Pre-function
11:00 am - 12:15 pm SC UG Transf. & Network Protectors UTNP D. Mulkey 80 MX S2 Atlanta 4,5
11:00 am - 12:15 pm SC Dielectric Tests DiTests M. Franchek 350 MX S3 Capital Ballroom
12:15 pm - 1:30 pm Lunch (on your own)
1:30 pm - 2:45 pm SC Dry Type Transformers Dry C. Johnson 80 MX S2 Atlanta 4,5
1:30 pm - 2:45 pm SC Power Transformers Power J. Watson 350 MX S3 Capital Ballroom
2:45 pm - 3:00 pm Break (beverages and treats) Capital Pre-function
3:00 pm - 4:15 pm SC Insulating Fluids IF D. Wallach 180 MX S3 Atlanta 1,2,3
3:00 pm - 4:15 pm SC Performance Characteristics PCS E. teNyenhuis 350 MX S3 Capital Ballroom
4:15 pm - 4:30 pm Break (beverages only) Capital Pre-function
4:30 pm - 5:45 pm SC Standards Stds J. Murphy 350 MX S3 Capital Ballroom
6:00 pm - 10:00 pm Dinner Social: Atlanta History Center. Advance registration required. See flyer for more information. -- Doors of museum open at 6:30 pm; with buffet dinner served at 7:30 pm. Cash bar provided. -- Paper tickets will not be provided. Admission verified with namebadges as you enter the museum. -- Buses begin loading at front of the hotel at 6:00 pm, last bus departs at 6:45 pm. -- After the event, buses begin loading at the Center at 9:00 pm, last bus departs at 10:00 pm.
** Contact Ed Smith ([email protected]) if you are interested in sponsoring a coffee-break at a future meeting.
page 5
KEY Note: A PC projector will be furnished in each meeting room. Arrive early to ensure equipment operates/syncs correctly. > -- activity continued into another session / from another session BD = boardroom; US = U-shape ++ -- not a Transformers Committee activity TBD = "To Be Determined" RT = multiple roundtables FC = flip chart; S1 = sound (special set-up) CL = classroom seating (w/head table for 2) S2 = stand mic in front only; S3 = one stand mic in front & stand mic(s) at mid-room TH = theater seating (w/head table for 2) MX = mix classroom & theater (w/head table)
SUBCOMMITTEES
Bush Bushings HVDC HVDC Converter Transformers and Smoothing Reactors
Mtgs Meetings
DiTests Dielectric Tests Power Power Transformers
Dist Distribution Transformers IF Insulation Fluids UTNP Underground Transformers and Network Protectors Dry Dry Type Transformers IL Insulation Life
IT Instrument Transformers Stds Standards
Thursday, March 24
No Meeting Registration, No Spouses/Companions Tours, No EPRI TF Meeting
7:00 am - 9:30 am Breakfast - Attendees & Spouses/Companions Combined Breakfast on Thursday!
300 RT (8/tbl) Garden Courtyard (Poolside)
8:00 am - 9:15 am Technical Presentation #1: "DGA Analysis, New Tools Such As The Duval Pentagon", by M. Duval, et al. See flyer on website
400 MX S1
Capital Ballroom (Level 1)
9:15 am - 9:30 am Break (beverages only) Capital Pre-function
9:30 am - 10:45 am Technical Presentation #2: "Application Guide for DPV Transformers" by C. Gaytan, S. Kennedy, H. Shertukde. See flyer on website.
400 MX S1
Capital Ballroom
10:45 am - 11:00 am Break (beverages only) Capital Pre-function
> 11:00 am - 12:00 pm Closing Session -- All attendees are encouraged to attend -- See separate document for meeting agenda
S. Antosz 400 MX S1
Capital Ballroom
Lunch on your own
12:30 pm - 8:00 pm Technical Tour: Power Partners, Inc. Transformer Factory; Athens, Georgia. By Invitation Only. -- Bus departs front of hotel at 12:30 pm; returns by 8:00 pm. Box lunch on bus; dinner on return to hotel. -- Indicate interest to attend tour during on-line meeting registration, or ... contact Ms. Meghan Monty at <[email protected]> or at +1.706.548.3121 ext 231.
Friday, March 25
No Committee Meetings, No Technical Tours, No EPRI TF Meeting
** Contact Tom Prevost ([email protected]) if you are interested in making a technical presentation at a future meeting.
FUTURE COMMITTEE MEETINGS
Fall 2016 - October 23-27; Vancouver, B.C. Canada
Spring 2017: March 26-30 or April 2-6; Location TBD
Fall 2017: October 15-19 or 22-26; Location TBD
page 6
Sheraton Atlanta Hotel 165 Courtland Street NE; Atlanta, Georgia 30303 USA
To: Members of Transformers Committee March 1, 2016
From: William H. Bartley, RETIRED Standards Coordinator
and Jim Graham, new Standards Coordinator
Executive Summary This report covers the Transformers Committee Standards activity for the 5 month period from Nov 1,
2015 to March 1, 2016. In the last 5 months, seven Revisions were approved by the Standards Board. In this same period, the Standards Board approved four PAR Extensions, four PAR modifications, one PAR for a new standard, one PAR for a Revision, and one PAR for a Corrigendum.
In this Report: I. Standards approved............................................................ pg 1
II. PA Rs approved.................................................................... pg 1 -2
III. Standards Board 2015 Meeting Schedule ......................... pg 2 -3
IV. T ransformer Committee Ballot Status .............................. pg 4
V. T ransformers Committee PA R Status ............................... pg 4 -6
VI. T ransformer Stds Status database .................................... pg 7 - 21
VII. T ransformer Stds Org Chart ................................................... pg 22-23
I. Standards approved since Nov 1, 2015
REVISIONS to Transformer Standards approved (All expire 31 Dec 2025, except for C57.13)
C57.12.00 Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating
Transformers
C57.12.90 Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers
C57.13 IEEE Standard Requirements for Instrument Transformers (expires 31–Dec– 2026)
C57.32 Standard Requirements, Terminology, and Test Procedures for Neutral Grounding Devices
C57.94 Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type
Distribution and Power Transformers
C57.106 Guide for Acceptance and Maintenance of Insulating Mineral Oil in Electrical Equipment
C57.139 Guide for Dissolved Gas Analysis in Transformer Load Tap Changers
II. PARs approved since Nov 1, 2015
PAR Extensions approved (All extended until December 2017)
PC57.12.24 Standard for Submersible, Three-Phase Transformers, 3750 kVA and Smaller: High Voltage, 34
500 GrdY/19 920 Volts and Below; Low Voltage, 600 Volts and Below
PC57.12.36 Standard Requirements for Liquid-Immersed Distribution Substation Transformers
PC57.19.04 Standard Performance Characteristics and Dimensions for High Current Power Transformer
Bushings with Rated Continuous Current in Excess of 5000 A in Bus Enclosures
Spring 2016 Standards Report Page 2 of 23
PC57.156 Guide for Tank Rupture Mitigation of Liquid-Immersed Power Transformers and Reactors
PAR Modifcations approved:
PC57.12.39 Standard Requirements for Distribution Transformer Tank Pressure Coordination
PC57.12.70-2011 /Cor 1 Standard Terminal Markings and Connections for Distribution and Power Transformers
- Corrigendum 1: Correction of Annex A
PC57.15 Standard Requirements, Terminology, and Test Code for Step-Voltage Regulators
PC57.147 Guide for Acceptance and Maintenance of Natural Ester Insulating Liquid in Transformers
(PAR Modifications do not change the Expiration Date)
New Projects approved: (Approved until December 2020)
PC57.19.02 Standard for the Design and Performance Requirements of Bushings Applied to Liquid Immersed
Distribution Transformers
PARs for Corrigenda approved: (Approved until December 2020)
PC57.12.38-2014/Cor 1 Standard for Pad-Mounted-Type, Self-Cooled, Single-Phase Distribution Transformers
250 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 V and Below; Low Voltage, 480/240 V and
Below - Corrigendum 1: Correct an omission in the label of Figure 1.
PAR Requests for REVISION of Standards (Approved until December 2020)
PC57.16 Std for Requirements, Terminology, and Test Code for Dry-Type Air-Core Series-Connected
Reactors
III. 2016 IEEE Standards Board Meeting Schedule
Starting in 2015, the Standards Board has only three physical board meetings per year. But they
supplement this with three (3) teleconference meetings. The full list of 2016 meetings is shown in
the calendar on the next page.
Deadlines for 2016 Standards Board Submissions:
Please Note: Anything that expires at the end of 2016 must be submitted to Standards
Board (either NESCOM or REVCOM) by October 17th
Standards Board Meeting Submission Deadline
March 2016 January 22, 2016
May 2016 teleconference March 22, 2016
June 2016 May 20, 2016
Sept 2016 teleconference August 5, 2016
December 2016 October 17, 2016
Spring 2016 Standards Report Page 3 of 23
IV. Transformers Committee Ballot Status (as of Mar 1, 2016)
Sub
comm
PAR or
Standard # Title Stage
# of
Balloters
Ballot
Close
Date
Die
lect
ric
PC57.138
Recommended Practice for Routine Impulse Test for
Distribution Transformers Ballot 95 3/11/2016
Dis
t
PC57.12.20
Standard for Overhead-Type Distribution Transformers 500
kVA and Smaller: High Voltage, 34 500 V and Below; Low
Voltage, 7970/13 800Y V and Below PreBallot 101
PC57.12.31-
2010-Cor_1
Standard for Pad-Mounted-Type, Self-Cooled, 1-Ph
Distribution Transformers <250 kVA - Corrigendum 1: Correct
an omission in the label of Figure 1.
Comment
Resolution 76 2/7/2014
PC57.12.34
Standard for Requirements for Pad-Mounted,Compartmental
Type, Self-Cooled, Three Phase Distribution Transformers,
10 MVA and Smaller
Comment
Resolution 1 106 6/7/2015
PC57.12.36
Standard Requirements for Liquid-Immersed Distribution
Substation Transformers
Comment
Resolution 142 11/5/2014
Dry
Typ
e
PC57.12.59
Guide for Dry-Type Transformer Through-Fault Current
Duration
Comment Resolution 1 89 7/16/2015
InsL
ife
PC57.119
Recommended Practice for Performing Temperature Rise
Tests on Oil-Immersed Power Transformers at Loads
Beyond Nameplate Ratings
Comment
Resolution 112 3/18/2015
Per
f
Cha
rac
PC57.159
Guide on Transformers for Application in Distributed
Photovoltaic (DPV) Power Generation Systems
Comment Resolution 1 129 1/25/2016
Pow
er
Tra
nsfo
rmer
s
PC57.156
Guide for Tank Rupture Mitigation of Liquid-Immersed Power
Transformers and Reactors
Comment Resolution 2 118 1/14/2016
P60076-16 Power Transformers - Part 16: Transformers for Wind
Turbine Application
Comment Resolution 151 2/27/2015
UG
PC57.12.24
Standard for Submersible, 3-Phase Transformers, <3750
kVA: High Voltage, 34 500 GrdY/19 920 Volts and Below;
IEEE Standard Performance Characteristics and Dimensions for Outdoor Apparatus Bushings
200012/31/2018
12/08/201012/31/2017
Approved +PAR for Revision
Formally Std. IEEE 24 Reaffirmed in 2005.PAR for Rev first approved Dec 2010Mar '10: NesCom extended PAR, unitl December 2013PAR Extension until 2017 approved in March 2014
Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller, High-Voltage 34 500 Volts and Below; Low-Voltage, 7970/13 800 Y Volts and Below
C57.12.34 Requirements for Pad-Mounted, 3-Phase DistributionTransformers, <2500 kVA HV <34 500 LV <480 Volts
12/09/2025Approved
Originally Std. 1447, Combined C57.22‐1980 & C57.12.26‐1992Revised Standard approved Dec09Mar '11: Nescom approved new PAR for RevisionRevision approved Sept 2015
Page 9 of 23Prepared by W. Bartley, Transformers Standards Coordinator march 18
STANDARDPROJECT
TITLEPub YearRev Due Dat
PAR Issue DatPAR Expiration
Standard StatusRemark
Working Group Chair
EmailPhone
SubCommittee DISTRIBUTION TRANSFORMERSS.
(417) 625-6110
[email protected] ShullC57.12.37 IEEE Standard for the Electronic Reporting of
Transformer Test Data200612/31/2025
Approved
Formally C57.132, IEEE Std 1388‐2000 D11d approved by SA Board on 3/30/2006.Published 7/21/2006. New PAR for Revision approved Dec'11Revision approved Sept 3 2015
Ventilated Dry-Type Power Transformers, 501 kVA and Large, Three-Phase, with High-Voltage 601 to 34500 Volts; Low-Voltage 208Y/120 to 4160 Volts - General Requirements
12/31/201808/21/201412/31/2018
Approved + Active PAR for Revision
Previously NEMA document C57.12.51, original publication by NEMA in 1981, Reaffirmed in 1998. This document was transferred to IEEE in Dec., 2002.Approved by SA Sept 2008. PAR for Revision approved Aug 2014
C57.12.52 Standard Requirements for Sealed Dry-Type Power Transformers, 501 kVA and Larger, Three-Phase, with High-Voltage 601 to 34 500 Volts, Low-Voltage 208Y/120 to 4160 Volts
198112/31/2022
Approved
Previously ANSI C57.12.52‐1981SA approved Dec 2012
C57.12.59 IEEE Guide for Dry-Type Transformer Through-Fault Current Duration
200112/31/2025
Approved
Reaffirmation approved in 12/5/2006.PAR for Revision and approved Dec'11PAR Modification (changing Scope) approved Dec 2014Revision Approved Sept 3 2015
IEEE Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type General Purpose Distribution and Power Transformers
198212/31/2018
12/09/201112/31/2015
Approved
Reaffirmation approved by the SA Board on 12/6/2006PAR for Revision approved Dec'11Std Submitted to Revcom and on Dec. Agenda
Stankes(603) 545-3026
S
C57.96
PC57.96
IEEE Guide for Loading Dry Type Distribution and Power Transformers
199912/31/2023
Approved - Active
RevCom approved reaffirmation on 9/22/2004Previous revision in 1994. PAR for Revision approved Dec 2009Ballot completed and on Dec2013 Revcom agenda.Approved by SASB Dec11 2013
C57.637 IEEE Guide for the Reclamation of Insulating Oil and Criteria for Its Use
198512/31/2018
Approved
Reaffirmation approved by SA Board 9/27/2007PAR for Revision approved Dec 2008PAR extension approved June 2012, until Dec 2014Another Extension granted until Dec 2015
C57.18.10 IEEE Standard Practices and Requirements for Semiconductor Power Rectifier Transformers
199801/30/2019
Approved
Replaced the C57.18‐1964 for pool cathode mercury‐arc rectifiers.Amendment 1: Technical and Editorial Corrections was approved 3/27/08Reaffirmed March 2009
C57.32 IEEE Standard Requirements, Terminology, and Testing Procedures for Neutral Grounding Devices
197212/31/2018
Approved - Active PAR to revise std
Dec. 2002 ‐ Sponsor changed from PES/SPD to PES/TR; PAR Modified and extended to Dec 2011; PAR stalled Oct'11, without a ballot. PAR withdrawn & New PAR submitted Oct'11, approved by Stds Bd Dec '11Standard submitted to Revcom and on Dec '15 Agenda
C57.117 IEEE Guide for Reporting Failure Data for Power Transformers and Shunt Reactors on Electric Utility Power Systems
198612/31/2018
Withdrawn
Previously IEEE 786‐1986, original approval date 6/19/1986.Oct 2010 decision to merge with C57.125.This standard is still Active because of PAR for revison of C57.125.This will be withdrawn when Revision of C57.125 is approved.
C57.131 IEEE Standard Requirements for Load Tap Changers
199512/31/2022
Approved Standard
PAR Modified Dec 09 and extended to Dec 2010.Dec '10: Nescom & Revcom extend untul Dec31 20111st Ballot closed May'11; 1st Recirc closed 21‐Oct; Std was approved Mar 2012
C57.135 IEEE Guide for the Application, Specification and Testing of Phase- Shifting Transformers
200106/16/2021
Approved
Approved for IEEE/IEC Dual Logo Dec. 2005 ‐ IEC 62032 Ed. 1
IEEE Guide for Installation of Liquid-Immersed Power Transformers
199512/31/2018
03/29/201212/31/2016
Approved Standard - with approved PAR for Revision
Rev of ASA C57.93‐1958, IEEE Std C57.12.11‐1980, & C57.12.12‐1980PAR to Revise IEEE Std C57.93‐1995 Approved by RevCom 12/2007PAR for Revision was approved March 2012
C57.152 IEEE Guide for Diagnostic Field Testing of Power Apparatus - Part 1: Oil Filled Power Transformers, Regulators, and Reactors
199512/31/2023
Approved
Originally IEEE 62. Reaff was successful.in 2005. New WG formed to revise document on a continuous basis based on TF recommendation. Revision changed to C57 series,
IEEE Standard for Underground Type, Self-Cooled, Single-Phase Distribution Transformers with Separable Insulated High-Voltage Connectors; High Voltage 25kV and Below; Low Voltage 600V and Below
200903/19/2019
08/21/201412/31/2018
Approved + active PAR for Revision
Published 4/20/2009PAR for Revision approved Aug 2014
Requirements for Transformers - Underground-Type, Three Phase Distribution Transformers: High Voltage (34 500 GrdY/19 920 V and Below) and Low Voltage (480V and Below, 2500 kVA and Smaller
200006/17/2019
11/09/201112/31/2015
Approved standard
New PAR for Revision approved Nov '11PAR Extension Requested /on Dec '15 Agenda
C57.12.57 Requirements for Ventilated Dry-Type Network Transformers 2500 kVA and Below, Three-Phase with High Voltage 34 500 Voltas and Below, Low Voltage 216Y/125 and 480Y/125 Volts
199212/31/2000
Standard WITHDRAWN in 2001
Existing standard withdrawn by IEEE on 1/15/2001. No longer endorsed by IEEE.
Page 21 of 23Prepared by W. Bartley, Transformers Standards Coordinator march 18
IEEE/PES Transformers Committee
Chair: Stephen Antosz
Vice Chair: Susan McNelly Secretary: Bruce Forsyth Treas: Greg Anderson
Past Chair: Donald Platts Std. Coordinator: Jim Graham
Instrument
Ross McTaggart
HVDC Converter Xfmrs &
Smoothing Reactors
Michael Sharp
Dry Type
Chuck W. Johnson
Distribution
Steve Shull
Bushing
Peter Zhao
Power
Joe Watson
UG & NW Protector
Dan Mulkey
Gen. Req. of Bushings
Rev of C57.19.00
K. Ellis
Bushing App. Guide
C57.19.100
T. Spitzer
OH Dist. Xfmrs
C57.12.20
A. Traut
Eqp Encl. Integrity
C57.12.28, 12.29,
12.30, 12.31, & 12.32
R. Olen
Elec Rpt of Test Data
IEEE 1388/C57.12.37
T. Callsen
General Req.
C57.12.01
R. Ballard
Req. & Test Code for
HVDC Con. Xfmr
C57.129
R. Dudley
Req. & Test Code for
HVDC Smoothing
Reactors IEEE 1277
U. Radbrandt
Step Volt. Regulator
C57.15
C. Colopy
Req for Inst. Xfmrs
C57.13
R. McTaggart
Test Proc. For Inst.
Xfmrs
C57.13.2
J.E. Smith
Test Req. for >= 115kV
PC57.13.5
P. Riffon
Req. for Elect. Rev.
Metering
C57.13.6
J.E. Smith
Guide for Monitoring
C57.143
D. Chu
Directly Connected
GSU C57.116
G. Hoffman
Req. for L.I. Power
Xfmrs C57.12.10
G. Hoffman
Std. Req. for Sec.
Network Xfmrs
C57.12.40
B. Kaplonski
UG 3ph Dist Xfmr
< 2500KVA
C57.12.24
G. Termini
Dry Type Air-Core
Reactors
C57.16
A. Del Rio
Performance
Characteristics
C57.19.01
S. Zhang
Req. & Testing of DC
Bushings
C57.19.03
L. Recksiedler
Req.for Vent. >500KVA
PC57.12.51
S. Som
Req. for Sealed
>500kVA
PC57.12.52
S. Kennedy
Thermal Eval. for Dry-Type
C57.12.60
R. Wicks
Transient Analysis
C57.12.58
R. Wicks
Dry-Type Through Fault
Current Duration
C57.12.59
P/ Payne
Test Code
C57.12.91
D. Foster
IEEE 638 – Std for 1E
Tx at Nuc Gen Stations
C. Swinderman
Guide for Phase-Shift
Xfmrs
C57.135
(Open)
Eval & Reconditioning
C57.140
P.Boman
Std for Control Cabinet
C57.148
(Open)
Arc Furnace Xfmr
C57.17
R. Ganser
Installation & Maint
Guide C57.93
M. Lau
Req. for 3ph Pad Mount
C57.12.34
S. Schull
UG Self-Cool 1-ph
C57.12.23
A. Traut
Pad-Mount 1ph Self-
Cool <2500kVA
C57.12.38
A. Ghafourian
Bar Coding
C57.12.35
L. Matthews
Perf Characteristics for GSU Bushings
PC57.19.04 S. Digby
Transportation Guide
PC57.150
G. Anderson
Tank Rupture
Mitigation C57.156
P. Zhao
Requirements for LTC
C57.131
Dry-Type Hottest Spot
C57.134
P. Payne
Dry Type Op & Maint.
Guide
C57.94
D. Stankes
Dist. Sub. Xfmrs
C57.12.36
J. Murphy
Guide for Paralleling
C57.153
E.T. Jauch
Page 22 of 23
Failure Investigations
C57.125
W. Binder
Functional Life Tests
for DETC C57.157
P. Hopkinson
Req. for mA CT
C57.13.7
H. Alton
Tank Pressure
Coordination
C57.12.39
C. Gaytan
Revised by J.Graham
17 Mar, 2016
Std Requirements
Phase Shifters
P60076-57-1202
R. Ahuja
TF for SSVTs
PC57.13.8
D. Wallace
TF to compare req’s of composite vs traditional
bushings
Loading Guide for Dry
Type Xfmrs
C57.96
R. Marek
Dry-Type PD & Apparent
Charge Measurement
C57.124
T. Prevost
Std. Req. for Sec.
Network Protectors
C57.12.44
W. Wimmer
Vent Dry-Type Network
Xfmrs <=2500KVA
C57.12.57
A. Robinson
IEEE/PES Transformers Committee
Chair: Stephen Antosz
Vice Chair: Susan McNelly Secretary: Bruce Forsyth Treas: Greg Anderson
Past Chair: Donald Platts Std. Coordinator: Jim Graham
Insulating Fluids
Dave Wallach
Insulation Life
Sheldon Kennedy
Dielectric Test
Mike Franchek
Performance Characteristics
Ed teNyenhuis
Standards
Jerry Murphy
Req. & Test Code for
Shunt Reactors
>500kVA C57.21
S.Som
Semicon Rectifier Xfmrs
C57.18.10
S. Kennedy
App. Guide for Xfmr
Connections
C57.105
A. Bromley
Sound Level Abatement
C57.136
(Open)
Impulse Test Guide
for Dist Tx C57.138
A Molden
Rev of Low Freq. Tests
B. Poulin
Guide for Acoustic PD
C57.127
D. Gross
DGA Guide
C57.104
R. Ladroga
Mineral Oil
C57.106
R. Rasor
Silicone Oil
C57.111
P. Boman
DGA During Thermal
Test C57.130
J. Thompson
Less Fammmable
H-C Fluid C57.121
D. Sundin
Loading Guide
C57.91
Don Duckett
TF Investigate Use of
Furan Testing
S. Xu
Max. Wdg Temp Rise
IEEE 1538
R. Marek
Temp Rise Test Above
NP Rating C57.119
G. Kennedy
Thermal Eval Test
C57.100
R. Wicks
Cont Rev of C57.12.00
S. Snyder
Cont. Rev of C57.12.90
S. Antosz
Metric Conversion
C57.144
P. Balma
Terminology
C57.12.80
J.Graham
Meetings
Greg Anderson
Through-Fault Current
Duration
C57.109
V. Mehrotra
Non-Sinusoidal Load
Current C57.110
R. Marek
Xfmr Loss
Measurement
C57.123
E. teNyenhuis
Short Circuit Testing
PC57.133
M. Fortin
Sw Transients CB/Xfmr
C57.142
R. Degeneff
App. Of High Temp
Insulation IEEE 1276
R. Wicks
DGA in LTC
C57.139
D. Wallach
TF – Moisture in
Insulation
B. Rasor
Oil Reclamation
C57. 637
J. Thompson
DGA in Silicone
C57.146
J. Murphy
Website Development
S. McNelly
Terminal Markings &
Connections
S. Schull C57.12.70
Diagnostic Field Testing
J. Verner
IEEE C57.152 /(62)Neutral Grounding
Devices PC57.32
S. Kennedy
Educational
Development
T. Prevost
WG on Dielectric
Test Table
P. Hopkinson
Sound Level
Measurement
PC57.151
TF - Temp Rise Test -
C57.12.90, Clause 11
P. Powell
IEEE /IEC Cross
Reference TF
V. Mehrotra
Guide to Freq Response
Analysis C57.149
C. Sweetser
PCS Rev to
Test Code- 12.90
M. Perkins
PCS Rev. to
Gen Req - 12.00
T. Ansari
PD Measurement
On Bushings & Inst Tx
C57.160
T. Hochanh
Rev of Transient
Voltage Test
P. Riffon/P. Heinzig
WG- External Dielectric
Test Clearance
E. Davis
Page 23 of 23
WG – Std Req. Hi Temp
Insulation C57.154
R. Marek
DGA in Ester Fluids
C57.155
P. Boman
TF for Particle Count
M. Scarborough
App Guide for Ester
Fluids -C57.147
P. McShane
Windfarm Transformers
P60076-16
D. Buckmaster
TF – Winding Temp
Indicators
P. McClure
TF – Fluid terminology
consistency
P. McShane
Tertiary & Stabilizing
Windings PC57.158
E. Betancourt
Loss Evaluation Guide
PC57.120
R Verdolinm
Revised J.Graham
17 Mar, 2016
Moisture in Insulation
PC57.162
T. Prevost
Committee
History
P. Balma
WG- Guide for DFR
testing PC57.161
A. Naderian
DPV Grid Transformers
PC57.159
H. Shertukde
PD Measurement
C57.113
B. Poulin
Transformer Capability
under GMD J. Verner
IEEE C57.163
TF Consolidation of Fluids Guides
T.Prevost
APPENDIX 3
IEC TC14 Technical Advisor to USNC Report
IEC TC 14 Philip J Hopkinson, PE & TA
• International Electro-Technical Commission TC 14 Power Transformers• Voting Relationships between standards• P-Member Active Countries• Members of US TAG• Documents and Programs• Last Plenary Meeting October 15-16, 2015 in Boras, Sweden• Meeting this year October 10-11 in Frankfurt, Germany• Stability Dates
IEEE Transformers Committee 032116 1
IEC TC 14 Philip J Hopkinson, PE & TA
• International Electro-Technical Commission TC 14 Power Transformers:• Headquartered in Geneva, Switzerland• Scope > = 10 kVA, Voltage classes >1,000 Volts, ac and dc
• Voting Relationships between standards organizations• IEEE and Cigre: 1 person, 1 vote• NEMA and EEI: 1 company, 1 vote• IEC: 1 country, 1 vote
• All votes cast by Technical Advisers to National Committees to Geneva
IEEE Transformers Committee 032116 2
IEC TC 14 Philip J Hopkinson, PE & TA
Member Countries in IEC TC 14
IEEE Transformers Committee 032116 3
IEC TC 14 Philip J Hopkinson, PE & TA
US TAG in IEC TC 14 as currently active
IEEE Transformers Committee 032116 4
IEC TC 14 Philip J Hopkinson, PE & TA
Attendance in Boras, Sweden on October 15-16, 2015
IEEE Transformers Committee 032116 5
IEC TC 14 Philip J Hopkinson, PE & TA
Current statistics28 Documents14 Current Active Projects
IEEE Transformers Committee 032116 6
IEC TC 14 Philip J Hopkinson, PE & TA
14 Active Projects 76-20 Energy Efficiency76-7 Loading Guide WG-32 PT’s and Reactors76-9 Loss Measurement 76-22-2 Radiators76-57-129 HV Converter Transformers 76-22-3 Liquid to Air Coolers76-57-15 Step Voltage Regulators 76-22-4 Liquid to Water Coolers76-10 Audible Sound 76-22-5 Pumps76-4 Lightning Impulse 76-22-6 Fans76-5 Short Circuit 76-22-7 Accessories & Fittings76-11 Dry Types 76-57-1202 Phase Shifters76-16 Wind Power MT 2014 Tap ChangersWG 3362984 Suppression Devices of DC Magnetic Bias
IEEE Transformers Committee 032116 7
IEC TC 14 Philip J Hopkinson, PE & TA
Stability Dates
IEEE Transformers Committee 032116 8
IEC TC 14 Philip J Hopkinson, PE & TA
Come to my meeting at 7:00 AM Wednesday, March 23 in Room Atlanta 1,2,&3!