Work Instruction
Date 2005-09-21Error! No text of specified style in document.1
SafetyItem no.: 9xxxxx.Rx
Class: IIIssued by: Technology
Page 2 of 10Type:
Document no.: 220/33KV SS 33kv Isolator maintenance workDate:
2015-02-09
Issued by: Class: 2
Type: T09 Service Work InstructionPage 8 of 8
220KV HARA SS 33KV Isolator Maintenance work
Anyone using this document must read this document in its
entirety before performing any work.Any questions or concerns
regarding any of the instructions contained in this document must
be Referred to Vestas.
History of this DocumentVersion no.DateDescription of
changesTechnical approver
0009.02.2015220KV HARA SS 33KV Isolator Maintenance work00
Table of Contents1. Safety
2. Educational Requirements of Service Technician
3. Terms and Abbreviations
4. Required Documentation
5. Purpose
6. Risk Assessment
7. Note
8. Tools
9. Consumables
10. Shut down Procedure
11. LOTO Procedure
12. Working Procedure
13. 5S to be done
Document no.: QMS 00087 V00
220KV HARA SS 33KV ISOLATOR MAINTENACE WORKDate: 2015-02-06
Issued by: Class: 1
Type: Service Work InstructionPage 1 of 8
Date 2005-09-21Error! No text of specified style in
document.History of this DocumentItem no.: 9xxxxx.Rx
Class: IIIssued by: Technology
Page 1 of 1Type:
Vestas Wind Systems A/S Alsvej 21 8940 Randers SV Denmark
www.vestas.com
Vestas Wind Systems A/S Alsvej 21 8900 Randers Denmark
www.vestas.com
SafetyAll work involved in the operation and maintenance of
Substations including work methods and practices, employee training
and protective measures, and use of tools and equipment, shall be
in accordance with the requirements of the applicable governmental
and private occupational safety and health codes and standards.
Employers engaged in such work are also required to be familiar
with and comply with Vestas Corporate OH&S Manual and documents
holding specific Substation safety instructions for the relevant,
Vestas shall not be responsible for any liabilities arising from
failure to comply with such requirements. Vestas reserves the right
to inspect such work to ascertain such compliance.The service
technician must read and understand the Personal Protection Sheets
for each of the chemicals used in this instruction. The Personal
Protection Sheets describe the safe use of chemicals within each
category.
For chemicals not specified with exact name and item no.,
contact the local SBU for information regarding Personal Protective
Equipment (PPE) and other safety instructions related to the use of
the chemical.
Personal Protection Equipment
Item. No.QuantityDescription
Standard personal protective equipment (PPE).
Chemical PPE according to 0001-0410 Personal Protective
Equipment Information Sheets.
Educational Requirements of Service TechnicianAt least two of
the service technicians working in a Substation are required to
possess valid course certificates for the Vestas Basic Safety
Training for Service Technicians, Supervisory License including
basic safety theory, first aid, fire prevention and firefighting,
emergency descent and any additional safety courses owing to local
requirements.Some tasks require one or more advanced training
modules or job specific training as described in the Vestas
Technical Training Programme. The person planning a specific task
must ensure that the service technicians involved possess the
proper know-how for completion of that task.Terms and
Abbreviations
Term orabbreviationDefinition
OH&SOccupational Health & Safety
PPEPersonal Protective Equipment
SBUSales Business Unit
SSSubstation
PTWPermit to Work
DisconnectorIsolator
CIRComponent Inspection Report
RARisk Assessment
JSEAJob Safety Environment Analyses
MSMethod Statement
LOTOLock out Tag Out
MSDSMaterial safety Data Sheet
Table 3-1: Abbreviations
TermExplanation
Lock out-Tag outUse of a sequence of physical locks and warning
tags to ensure that an electrical or mechanical device cannot be
accessed or energized.
Standard toolsThose tools normally using Calibrated and standard
tools.
(SCADA) Supervisory Control and Data AcquisitionA computer
system that collects data from sensors and machinery in order to
monitor and control equipment in remote locations.
Table 3-2: Explanation of terms.
Required DocumentationDocument no.Title
0000-0496Vestas Corporate OH&S Manual
0001-0410Personal Protective Equipment (PPE) Information
Sheets
LOTO Procedure
Relevant MSDSs for the chemicals used in this document
33kv Isolator manual.
Service Check List
RA, JSEA, MS and Permit to Work
Table 4-1: Required documentationPurposeThis service work
instruction describes how to perform 33kv Isolator maintenance in
outdoor switch yard.Risk AssessmentReferring JSEA, MS, RA for
maintenance of 33kv Isolator in Substation.NoteThe Maintenance of
33kv Isolator requires the following work Isolate the HV / LV
supply as per the LOTO Instructions. Disconnect the Earthing and
Auxiliary supply connections. Organise the suitable tools for
maintenance of 33kv Isolator. After maintenance connect the all
removed connections (Earthing, Auxiliary supply cables, LV & HV
isolation points).Tools
Item no.QuantityDescription
VT-18819101Multimeter
VT-18807601Megger 5KV
10M X 0210 Meter Wire for Meggaring
01High Voltage detector
01Allen key set
01Tapariya set
01DE & NDE Spanner Set 10mm to 36mm
0117 to 21 Tube Bits (Clicker set)
Each 01General tools Kit (Screw driver set, Adjustable spanner,
etc.)
01Torque wrench
Consumables
Item no.QuantityDescription
As requiredCotton waste
60047672As requiredCleaning Agent Locktite 7070
236400As requiredGloves Cotton Interlock
As requiredGloves nitrile
70000423As requiredRustlick
As RequiredPetroleum jelly
Shutdown Procedure10.1 Toolbox TalkIn Tool Box Discussing work
related and safety related, safety Alert, HSE Messages.10.2 Stop
the WTG.1. Notify affected employees that the turbine will be under
LOTO for 33kv Isolator maintenance work. It is mandatory to notify
Vestas site management and any sub-contractor lead technicians if
sub-contractors are on site.2. Before entering a SCADA-equipped
turbine, call the site office and site management to remotely stop
the turbine.3. After remote shutdown, the site management must
enter a note in SCADA confirming work on Substation
maintenance.
10.3 Trip the respective line up and down side SF6 Circuit
Breakers 0r 33kv VCB.
10.4 Open the respective line up and down side Isolators.
10.5 Check the absence of Voltage by using High Voltage
detector. General Inspection of HV Detector and Arc flash suit.
Condition of HV Detector and working of siren. After wearing Arc
flash suit wear HT hand gloves. Keep the HV detector near to the
dead line (Dont touch the HV detector to dead line). Observe no
hearing siren at near dead line.
11. Apply the LOTO Procedure as per the LOTO instructions
toRespective line up and down side Isolators: Put Earth rods in
both dead line side (always first connect earth rod wire to earth
pit connection and then put earth rod to dead line and discharge
the power.) then apply LOTO in AB Switch. 12. 33kv Isolator Working
Procedure:12.1 Visually inspect the General checks of 33kv Isolator
like General Condition of Isolator on Cleanliness. Condition of
marshalling box external internal paint. Check the condition of
Outer body welding joints. Condition of Isolator name plate. Before
to work at any place read carefully the displayed WARNINGs. Check
the incoming side and outgoing side PG Clamps for hot spot. Check
the proper Earthing Connections. Marshalling boxes inspections. Gas
refilling / collecting valves. Check the cable gland nut and cable
condition affected by environment. Checks the painting condition if
rusted apply paint. Lubricate moving parts with correct lubricate.
Follow instructions given in the operating manual. Do not leave any
tools at top of the Isolator. Do not operate the Isolator while
testing or cleaning. Check the all hardwares tightness.
12.2 Bushings:- Check the hardware tightness at cone of the
bushes. Clean and observe around the bush for any damage. Check the
mounting hardware condition. Check the hot spot at the HV
terminals.
12.3 Marshalling box. Using cable schedule & marshalling box
wiring diagram check the interlock in between control panel and
Isolator marshalling box through proper communication cable. Check
all control cable condition and nomenclature in cables. Check the
Cable and Wires ferule availability and conditions. Check the
connections tightness at all the terminals. Check the condition of
operating handle earthing connections. Check the Tendom rod
condition and connections.
Clean the inside marshalling box. Close the unwanted cable holes
to avoid entry of reptiles. Check the cable rooting with proper
cable ties. Check the door locks condition and operating. Check the
heater, illumination lamp and aux. socket working condition
etc.
13. 5S To be follow as. 1. All the structure parts and hardwares
conditions are properly.1. Do the housekeeping completely.2. Get a
conformation either all activity completed or not. If completed
remove the established LOTO system according to standards.3. Remove
the earth rod, return the PTW to respective in-charge and power up
to transformer and observe the humming noise during the time of
charging. If u feels abnormality suddenly report to management.
5.Keep door and covers firmly closed to prevent entry of dust,
moisture and insects etc. 6.Ensure that Manual Operating handle is
kept in the mechanism housing.Vestas Wind Systems A/S Alsvej 21
8940 Randers SV Denmark www.vestas.com