hv switching procedure
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Appendix 5: HV SWITCHING PROGRAM FIRST PAGE
High Voltage Switching Procedure
Procedure No.: Page 1 of 4
CP Number:
Purpose: To Bring the TG -3101A Power to the 6.6kv Switch Board
Attachments:
Prepared by: Date:
Print Name Signature Checked by: Date:
Print Name Signature Approved by: Date:
Print Name Signature
Legend I ISOLATE: Circuit breaker to be racked out.
E EARTH: Circuit breaker earth switch to be applied.
L LOCKED: High voltage lock to be applied.
T TAGGED: CP Isolation Tag to be applied with Procedure No. (above) written on it.
CHECK DEAD: Item to be tested and proved dead with HV phasing sticks.
Phasing sticks to be tested before and after test.
DEISOLATE: Tags placed under this procedure to be removed
INSULATION TEST: Phase to earth to be checked using a 5kV megger.
Step Action Performed by Time / Date
1 Check the SWBD Grounding is Connected at both Ends. Switch board is barricaded. Confirm Proper Fire Extinguishers are available.
2 Make Sure All Outgoing Motor Feeder are isolated and Padlocked in Outgoing Cable Earthed Position.
3 Make Sure All Outgoing Transformer Feeder are isolated and Padlocked in Outgoing Cable Earthed Position.
4 Check the TG 3101A incomer breaker is Racked out.
5 Confirm the Bus A, Bus B VT Fuses are inserted and Outgoing MCB is OPEN (Open)
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APPENDIX 5: HV Switching Program Subsequent Page
High Voltage Switching Procedure
Procedure No.: Page 2 Of 4
CP Number:
Purpose: To Bring the TG 3101A Power to the 6.6kv Switch Board
Attachments:
Prepared by: ( ATE / AEE ) Date:
Print Name Signature Checked by: ( AEE ) Date:
Print Name Signature Approved by: ( Comm Mgr ) Date:
Print Name Signature
Step Action Performed by Time / Date 6 Confirm the TG-3101 B & 3101 S Incomer Breaker is Open and
isolated and Padlocked in Incomer Cable in Earthed Position.
7 Confirm the Bus Tie A-B Breaker is Open and racked out in Isolated position.
8 Confirm the Bus A & B Earth Switch is In OPEN Position
9 Confirm the Bus A is meggered with 5kV Megger and Record its results. R Y+B Grounded _______ Mohms Y R+B Grounded _______ Mohms B R+Y Grounded _______ Mohms
10 Confirm the Bus B is meggered with 5kV Megger and Record its results. R Y+B Grounded _______ Mohms Y R+B Grounded _______ Mohms B R+Y Grounded _______ Mohms
11 Confirm the Phasing Sticks are Working and In Good shape. HV Gloves and Rescue Sticks are Readily available.
12 Run the TG 3101A and Excite TG 3101A.
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APPENDIX 5: HV Switching Program Subsequent Page
High Voltage Switching Procedure
Procedure No.: Page 3 Of 4
CP Number:
Purpose: To Bring the TG 3101A Power to the 6.6kv Switch Board
Attachments:
Prepared by: ( ATE / AEE ) Date:
Print Name Signature Checked by: ( AEE ) Date:
Print Name Signature Approved by: ( Comm Mgr ) Date:
Print Name Signature
Step Action Performed by Time / Date 15 On the TG 3101A Incomer Breaker Panel Lift the shutters of the
Cable side and Measure the Phase & Line Voltages. R-Y ____kV Y-B ____kV R-B ____kV
16 At the TG-3101A Cable Side VT Secondary terminal check the Voltage and Phase Rotation is correct. R-Y ___Volts Y-B ___Volts R-B___Volts Freq ___ Hz
17 Rack in TG-3101A circuit Breaker and Initiate CLOSE Command From TG Control Panel.
18 On the Bus Tie Breaker Panel Lift the shutters of the Bus A side and Measure the Phase & Line Voltages. R-Y ____kV Y-B ____kV R-B ____kV And Confirm the Voltages are same in the Bus A Voltmeter
19 At the Bus A VT Secondary terminal check the Voltage and Phase Rotation is correct. CLOSE the VT Outgoing MCB to CSP R-Y ___Volts Y-B ___Volts R-B___Volts Freq ___ Hz
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APPENDIX 5: HV Switching Program Subsequent Page
High Voltage Switching Procedure
Procedure No.: Page 4 Of 4
CP Number:
Purpose: To Bring the TG 3101A Power to the 6.6kv Switch Board
Attachments:
Prepared by: ( ATE / AEE ) Date:
Print Name Signature Checked by: ( AEE ) Date:
Print Name Signature Approved by: ( Comm Mgr ) Date:
Print Name Signature
Step Action Performed by Time / Date 20 Rack in Bus Tie A-B circuit Breaker and CLOSE the Breaker from
TG Control Panel
21 At the Bus B VT Secondary terminal check the Voltage and Phase Rotation is correct. CLOSE the VT Outgoing MCB to CSP R-Y ___Volts Y-B ___Volts R-B___Volts Freq ___ Hz
22 Confirm the Voltage is Steady and no abnormal noises are heard.
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Appendix 6: HV ELECTRICAL ISOLATION CERTIFICATE
HV Electrical Isolation Certificate
Certificate No.: 1001
CP No.:
1. CERTIFICATE ISSUED TO (ENTER CP HOLDERS NAME):
2. TAG NO. OF EQUIPMENT ISOLATED:
EQUIPMENT DESCRIPTION:
EQUIPMENT SUPPLIED FROM SWITCHBOARD / DB INCLUDING CUBICLE/CIRCUIT NO.:
3. ISOLATION POINTS (INCLUDING PADLOCK NOS.):
4. EARTHING POINTS (INCLUDING PADLOCK NOS.):
5. ADDITIONAL PRECAUTIONS:
6. ISOLATE
I HEREBY CONFIRM THE EQUIPMENT DETAILED IN SECTION 3. ABOVE IS ISOLATED AND SAFE.
AEE: / /
Print Name
Signature Date & Time
7. ACCEPT I HEREBY AGREE WITH AND ACCEPT THE ISOLATION THAT HAS BEEN PERFORMED ON THE EQUIPMENT
DETAILED IN SECTION 6.6 ABOVE AND ACKNOWLEDGE THAT I UNDERSTAND THE LIMITS OF THE ISOLATION. CP HOLDER: / /
Print Name
Signature Date & Time
8. WORK COMPLETE THE SCOPE OF WORK ASSOCIATED WITH THIS ELECTRICAL ISOLATION CERTIFICATE IS COMPLETE AND
THE WORK AREA IS IN A CLEAN AND SAFE CONDITION. CP HOLDER: / /
Print Name
Signature Date & Time
9. DE-ISOLATION THE ISOLATIONS AND EARTHING POINTS HAVE BEEN REMOVED. THIS CERTIFICATE IS CANCELLED. AEE: / /
Print Name
Signature Date & Time
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Appendix 7: HV CHECKLIST
CHECKLIST - High Voltage Isolation / Testing
Electrical Isolation Certificate No.:
CP No.:
INSTRUCTIONS:
1. HV Isolation Checklist to be completed by AEE
2. AEE to attach the completed checklist to the original copy of the electrical Isolation certificate
AEE TO
MARK N/A
OR INITIAL
PRECAUTIONS FOR HV ISOLATION
1. TAG NUMBER VERIFIED
2. CIRCUIT BREAKER REMOVED AND VERIFIED
3. CONTROL FUSES REMOVED
4. VTs RACKED OUT
5. CTs SHORTED
6. CIRCUITS CHECKED, TESTED AND PROVEN DEAD
7. CABLES DISCHARGED AND EARTHED
8. EARTHING SWITCHES CLOSED AND PADLOCKED
9. ISOLATION TAGS FITTED TO ALL PADLOCKS
10. LIMITS OF ISOLATION DEFINED ON AA
PRECAUTIONS FOR HV TESTING
1. Minimum of two persons at the work face at all times 2. TEST EQUIPMENT CHECKED AND OPERATIONAL 3. INSULATION MATS IN POSITION
4. AREA CORDONED OPEN - SIGNS AND BARRIERS IN PLACE
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