NEPAL ELECTRICITY AUTHORITY (An Undertaking of Government of Nepal) Project Management Directorate SASEC: Power System Expansion Project KALIGANDAKI TRANSMISSION CORRIDOR PROJECT BIDDING DOCUMENT FOR Procurement of Plant for Kusma – New Butwal 220 kV Transmission Line (Design, Supply and Install) Single-Stage, Two-Envelope Bidding Procedure Issued on: Invitation for Bids No.: ICB-PMD-KGTCP–072/73-04 ICB No.: ICB-PMD-KGTCP-072/73-04 Employer: Nepal Electricity Authority Country: Nepal ADDENDUM-II August 2016 Kaligandaki Transmission Corridor Project Project Management Directorate Satungal – Bauthali Chowk Marga, Chandragiri Municipality, Matatirtha, Kathmandu, Nepal Telephone: + 977-1- 5164099,5164091 Facsimile number: +977-1-5164091 Electronic mail address: [email protected]Telephone: +977-1-5164091, 5164099
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NEPAL ELECTRICITY AUTHORITY ELECTRICITY AUTHORITY ... Supply,Installation and Commissioning of Kusma-New Butwal220 kV Transmission Line ... Whether foundation has to be designed for
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NEPAL ELECTRICITY AUTHORITY
(An Undertaking of Government of Nepal)
Project Management Directorate
SASEC: Power System Expansion Project
KALIGANDAKI TRANSMISSION CORRIDOR PROJECT
BIDDING DOCUMENT
FOR
Procurement of Plant for Kusma – New Butwal 220 kV Transmission Line
Whether bored piles of 800 mm diameter can be used in the project. In the design of transmission lines in
China, bored piles of 800 mm diameter have been large-scale used, which can fully guarantee the
engineering quality and safety.
This shall be as per the provisions
of the Bidding Document
Whether the foundation of other forms can be used. For example, when the foundation is located in the
mountain but the slope is steep, using the anchor foundation makes the excavated volume too big, therefore
we suggest using the rock embedded foundation. When the foundation is located in the hilly area, using the
PAD foundation makes the excavated volume too big, therefore we suggest using the excavating pile
foundation.
165
Should we close the road when crossing national highways? Should we cut off the power when crossing
power line? Should we close the river when crossing navigable river? If necessary, who is responsible for
handling procedures, whether other measures need to be monitored?
The employer shall facilitate
during such instances.
164
162This shall be as per the provisions
of the Bidding Document
This shall be as per the provisions
of the Bidding Document
11 of 12
166Response to Pre bid queries
- 1, Sl No. 34
Sag at maximum temperature for HTLS conductor is mentioned as 9.75m in technical specification As
per your response it is confirmed to use this sag for fixing tower height for other bidders inquiry. In
contrast in tender document you have furnished sag tension calculation with sag of 10.36m at 80 deg
temperature. please confirm which Sag is to be considered .
Please refer Addendum-II
167 Volume-II, Section-III,
Page No. 12, clause no.3.4.1
"CBIP Manual on transmission line towers, Chapter – 10 Foundations"
Please specify the publication no. 268 or 323 to be referred.
The latest publication to be
reffered. However, the provision of
technical specifications shall
prevail, in case, of any
descrepancy.
168
Custom Duty (Sr. No. 21.c
of Response to Pre-bid
Queries-1, Page 4 of 20)
In the above referred reference, NEA’s response is exemption of all taxes and duties except custom
duty @ 1%.
Whereas as per Point No. (c) of Cl. No. 14 of SCC on Page No. 8-5, the custom duty will be
reimbursed by the Employer to the Contractor and the same is also confirmed in the Sr. No. 56 of
Response to Pre-bid Queries-1, Page 10 of 20.
From the above, we understand that, custom duty @ 1% will be reimbursed by Employer to the
contractor.
Please Confirm.
Yes your understanding is correct
12 of 12
Page 1 of 5
Amendment-II to Bidding Documents, Volume-I
Clause No. Existing Amendment
Volume-I,
Section-3, Clause
no. 1.2.6
1.2.6 Specific additional criteria
When evaluating individual bids received, differential price
evaluation for the HTLS conductors offered by the bidders shall
be carried out @US$ 2,962.00 per kWfor the average ohmic
losses calculated as follows:
The best parameter of loss (lowest ohmic loss for conductor)
corresponding to lowest AC resistance quoted among bidders
by any technically response ve and qualified bidder shall be
taken as basis and that quoted by the particular bidder shall be
used to arrive at differential price to be applied for each bid.
Average Ohmic loss (kW) = Loss Load Factor X Line Length x
No. of phasesx No. of subconductors X (Continuous operating
current under normal condition)2 X AC Resistance
corresponding to continuous operating current.
For 1062km conductor length, loss load factor = 0.325,
continuous operating current of 1200 Amp;
Average Ohmic loss (kW) = 0.325 x 1062 x (1200)2 x
Rac/1000
= 497,016 X Rac
Where Rac is the AC resistance per km guaranteed by the
bidder at temperature corresponding to the continuous operating
current of 1200A under normal condition.
1.2.6 Specific additional criteria
When evaluating individual bids received, differential price
evaluation for the HTLS conductors offered by the bidders shall
be carried out @US$ 2,962.00 per kWfor the average ohmic
losses calculated as follows:
The best parameter of loss (lowest ohmic loss for conductor)
corresponding to lowest AC resistance quoted among bidders by
any technically responsive and qualified bidder shall be taken as
basis and that quoted by the particular bidder shall be used to
arrive at differential price to be applied for each bid.
Average Ohmic loss (kW) = Loss Load Factor X Line Length x
No. of phasesx No. of subconductors X (Continuous operating
current under normal condition)2 X AC Resistance
corresponding to continuous operating current.
For 1062km conductor length, loss load factor = 0.325,
continuous operating current of 615 Amp;
Average Ohmic loss (kW) = 0.325 x 1062 x (615)2 x Rac/1000
= 130544.36X Rac
Where Rac is the AC resistance per km guaranteed by the bidder
at temperature corresponding to the continuous operating current
of 615A under normal condition.
Volume – I
Section 3,
Sub Clause 2.5:
Subcontractor
Point 2 – Core
HTLS Conductor
Page (3 of 9)
"Must have manufactured, tested and supplied core at least
twice the bid quantity as a main supplier over last five (5) years
period as on date of bid submission and the same should have
been in satisfactory operation in the field for at least three (3)
years as on originally scheduled date of bid opening”.
"Must have manufactured, tested and supplied core at least twice
the bid quantity as a main supplier over last ten (10) years period
as on date of bid submission and the same should have been in
satisfactory operation in the field for at least three (3) years as on
originally scheduled date of bid opening”.
Page 2 of 5
Amendment-II to Bidding Documents, Volume-II
Clause No. Existing Amendment
Volume II,
Section VA 1.4.1 Particulars Limiting value
Tension at every day condition
(32°C, no wind)
Not exceeding
25% of UTS of
proposed
conductor
Sag at designed maximum
temperature (corresponding to 1200
amperes and ambient conditions
specified at 1.2.1)
≤9.75 meters
Tension at following wind pressure:-
i) Tension at 32 deg C, full wind
(166.8kg/m2)
≤ 6892kg & not
exceeding 70% of
UTS of proposed
conductor
Particulars Limiting value
Tension at every day condition
(32°C, no wind)
Not exceeding
25% of UTS of
proposed
conductor
Sag at designed maximum
temperature (corresponding to 1200
amperes and ambient conditions
specified at 1.2.1)
≤10.36 meters
Tension at following wind pressure:-
i) Tension at 32 deg C, full wind
(166.8kg/m2)
≤ 6892kg & not
exceeding 70% of
UTS of proposed
conductor
Volume-II,
Section-IV,
Clause 1.1.3
The towers shall be of the following types:
A) Double Circuit towers (DA, DB, DC & DD/DDE)
B) Special towers.
The towers shall be of the following types:
A) Double Circuit towers (DA, DB, DC & DD/DDE)
B) Special towers (DDS)
Page 3 of 5
Volume-II,
Section-IV,
Clause 1.2.1
The towers for 220 kV Lines are classified as given below:
The towers for 220 kV Lines are classified as given below: _________________________________________________
Type of Deviation Typical Use
Tower Limit
_________________________________________________
DDS 0 - 60 deg. a) Angle tower with tension insulator string used for very long spans.
b) Also to be used for uplift forces resulting from an uplift span up to 900m under broken wire condition.
c) Complete dead end. _______________________________________________
Note: The DDS tower shall also meet all the technical requirements specified for DD type tower, unless stated.
Volume-II,
Section-IV,
Clause 1.6.2
Conductor and Earthwire Configuration For double circuit towers the three phases shall be in vertical formation. The phase to phase spacing for conductors shall be not less than 4.9 meters vertically for DA/DB/DC towers and 8.30 meters for DD tower. However, the minimum horizontal separation between phase conductors of two circuits shall be 8.4 meters.
Conductor and Earthwire Configuration For double circuit towers, the three phases shall be in vertical formation. The phase to phase spacing for conductors shall be not less than 4.9 meters vertically for DA/DB/DC towers, 8.30 meters for DD tower and 11.80 meters for DDS tower. However, the minimum horizontal separation between phase conductors of two circuits shall be 8.4 meters.
Volume II,
Section IV, 3.1.1
The stringing equipment shall be of sufficient capacity to string simultaneously a bundle of TWIN ZEBRA Conductors.
The stringing equipment shall be of sufficient capacity to string simultaneously a bundle of TWIN HTLS Conductors.
Volume-II,
Drawings
Drawings
Insulator String Drawings
Drawings
Insulator String Drawings (Revised)
Page 4 of 5
Volume II,
Section VA,
2.1.2
In the event of any discrepancy in the test report (i.e., any test
report not applicable due to any design /
material/manufacturing process change including substitution
of components or due to non compliance with the requirement
stipulated in the Technical Specification) the tests shall be
conducted by the Contractor at no extra cost to the Employer/
Employer/ Purchaser.
In the event of any discrepancy in the test report (i.e., any test
report not applicable due to any design / material/manufacturing
process change including substitution of components or due to
non compliance with the requirement stipulated in the Technical
Specification) the tests shall be conducted by the Contractor at
the cost quoted as per the BPS Schedule 4(d).
Volume II, GTP
Schedule 8, Page
4, S. No. 7.16
AC resistance at maximum continuous operating temperature
corresponding to specified maximum operating current (1000 A
under ambient condition enclosed as per Technical
Specification )
AC resistance at maximum continuous operating temperature
corresponding to specified maximum operating current (1200 A
under ambient condition enclosed as per Technical
Specification)
Volume II, GTP
Footer &
Schedule 8
“ TECHNICAL DATA SHEETS (VOLUME III)” &
TECHNICAL SPECIFICATION (VOL III)
“ TECHNICAL DATA SHEETS (VOLUME II)” & TECHNICAL
SPECIFICATION, EMPLOYER’S REQUIREMENT (VOL II)
Page 5 of 5
Amendment-II to Bidding Documents, Volume-III
Clause No. Existing Amendment
Volume III,
Schedule 4(a)
4.3 Tension Tower DC
b) Foundation for +1.5m, +3m, +4.5m +6m, +7.5m, +9m Extension
iii) Partially Submerged Foundation Nos. 2
v) Wet Black Cotton Nos. 3
4.3 Tension Tower DC
b) Foundation for +1.5m, +3m, +4.5m +6m, +7.5m, +9m Extension
iii) Partially Submerged Foundation Nos. 3
v) Wet Black Cotton Nos. 4
4.4 Tension Tower DD
a) Foundation for -4.5m, -3m, -1.5m, +/- 0m Extension
v) Wet Black Cotton Nos. 4
4.4 Tension Tower DD
a) Foundation for -4.5m, -3m, -1.5m, +/- 0m Extension
v) Wet Black Cotton Nos. 3
4.4 Tension Tower DD
b) Foundation for +1.5m, +3m, +4.5m +6m, +7.5m, +9m Extension
vi) Dry Fissured Rock Nos. 6
4.4 Tension Tower DD
b) Foundation for +1.5m, +3m, +4.5m +6m, +7.5m, +9m Extension
vi) Dry Fissured Rock Nos. 5
Volume-III,
Price Schedule-3
Design Services Type DA, DB/DBE, DC/DCE, DD/DDE and special towers
Design Services Type DA, DB, DC, DD/DDE, DDS and special towers
NOTES:1. Wind Span 350 m (NC), 210 m (BWC)2. Weight Span 1500 m (NC), 900 m (BWC) Maximum -1500 m (NC), -900 m (BWC) Minimum3. All ultimate loads are in kg.4. Bracketed figures indicate Minimum Vertical Load/Uplift Loads5. Angle of Deviation = 60 °6. Wind Load (Full Wind) on Tower Body shall be considered extra in all above assumptions.7. S.W. (Self Weight) of Tower shall be considered Extra.8.Assm. 2A, 3A & 4A indicates Right Side GW Broken conditions.9. Assm. 5A indicates Right Side Conductors Broken condition.10. Insulator Strings Weight & Wind on Strings are included in above Load.
NOTES:1. Wind Span 350 m (NC), 210 m (BWC)2. Weight Span 1500 m (NC), 900 m (BWC) Maximum -1500 m (NC), -900 m (BWC) Minimum3. All ultimate loads are in kg.4. Bracketed figures indicate Minimum Vertical Load/Uplift Loads5. Angle of Deviation = 60 °6. Wind Load (Full Wind) on Tower Body shall be considered extra in all above assumptions.7. S.W. (Self Weight) of Tower shall be considered Extra.8.Assm. 2A, 3A & 4A indicates Right Side GW Broken conditions.9. Assm. 5A indicates Right Side Conductors Broken condition.10. Insulator Strings Weight & Wind on Strings are included in above Load.
NEPAL ELECTRICITY AUTHORITY
SHEET NO. 2 OF 4DRG. No.
LOAD TREES FOR TYPE- DES
ASSM 15, 15A: DEAD END CONDITION(COND BROKEN)
NOTES:1. Wind Span 200 m (NC), 40 m (BWC)2. Weight Span 750 m (NC), 100 m (BWC) Maximum -750 m (NC), -60 m (BWC) Minimum3. All ultimate loads are in kg.4. Bracketed figures indicate Minimum Vertical Load/Uplift Loads5. Angle of Deviation = 15 °6. Wind Load (Full Wind) on Tower Body shall be considered extra in all above assumptions.7. S.W. (Self Weight) of Tower shall be considered Extra.8. Assm. 12A, 13A & 14A indicates Right Side GW Broken conditions.9. Assm. 15A indicates Right Side Conductors Broken condition.10. Insulator Strings Weight & Wind on Strings are included in above Load.
NOTES:1. Wind Span 200 m (NC), 40 m (BWC)2. Weight Span 750 m (NC), 100 m (BWC) Maximum -750 m (NC), -60 m (BWC) Minimum3. All ultimate loads are in kg.4. Bracketed figures indicate Minimum Vertical Load/Uplift Loads5. Angle of Deviation = 15 °6. Wind Load (Full Wind) on Tower Body shall be considered extra in all above assumptions.7. S.W. (Self Weight) of Tower shall be considered Extra.8. Assm. 12A, 13A & 14A indicates Right Side GW Broken conditions.9. Assm. 15A indicates Right Side Conductors Broken condition.10. Insulator Strings Weight & Wind on Strings are included in above Load.