Work Instruction

Date 2005-09-21Error! No text of specified style in document.1 SafetyItem no.: 9xxxxx.Rx

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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