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Document Number: ECP 11-0514a

Version: 2.0

Date: 23/05/2016

ACB TEST FORM

Substation Name

Substation Number

Voltage

ACB

Installed Mode Wall () Transformer () Cabinet ()

Manufacturer Schneider Type

Serial Number

Protection

Micrologic Type CT Ratio

Protection Settings

Reverse Power Relay

Manufacturer/Type English Electric/GEC CAG/PCD () Reyrolle TGG ()

Serial Number

Preliminary Checks ()

ACB disconnected from the RTU (if fitted)

Visual inspection satisfactory (no visible signs of damage etc)

Earthing satisfactory

Protection settings applied

Functional/Interlock Checks ()

Check spring charging using handle

Close ACB

Open ACB

Check electrical spring charging (MW ACBs only) when transformer is on or connect 240V supply (auxiliary terminal block K3 to 5)

ACB Continuity Test

ACB Terminals Under Test Continuity

Incoming Side (Transformer )

Outgoing Side (LV Board)

Closed L1 L1

Closed L2 L2

Closed L3 L3

ACB Insulation Tests using 1kV Test Voltage

ACB Terminals Under Test Voltage Insulation

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Document Number: ECP 11-0514a

Version: 2.0

Date: 23/05/2016

(kV) ResistanceTransformer LV Terminal

Distribution Board

Closed L1 L2, L3 1 M

Closed L2 L1, L3 1 M

Closed L3 L1, L2 1 M

Open L1, L2, L3 L1, L2, L3 1 M

Secondary Injection Tests using Full-function Test Kit

Close ACB ()

Connect the test lead to test kit and to 10-pin test socket on the trip unit ()

Connect the power cable to test kit ()

Turn on the test kit and observe the power on test ()

Enter the ACB parameters (press Next > Test Breaker Trip) from the table below ()

Parameter NS1250 NT16H1 NT16H2 NW16H1 NW16H2 NW20H1

Trip Unit Family Micrologic Micrologic Micrologic Micrologic Micrologic Micrologic

Trip Unit Type 5.0 5.0A 5.0A 5.0A 5.0A 5.0A

Breaker Family Compact Masterpact Masterpact Masterpact Masterpact Masterpact

Breaker Type NS NT NT NW NW NW

Standard IEC IEC IEC IEC IEC IEC

Interrupt Rating N H1 H2 H1 H1 H1

In 1250 1600 1600 1600 1600 2000

()

Press Automatically Test Trip Curve and confirm that the protection settings shown on the Configure Protection Parameters screen match those applied to the Mircologic unit (if the settings are incorrect refer to procedure ECP 11-0514)

()

Press Next and ensure all four options read Enabled on the Configure Automatic Trip Curve Test screen

()

Press Next and then Yes to start the test ()

On completion of each test record the test results below and reclose ACB ()

Function Injection Current Trip Time Passed

Long Time ()

Short Time ()

Instantaneous ()

Ground Fault ()

Disconnect test kit ()

Note: The Micrologic may fail the short term test if the long term test is performed first. If the short term test fails wait 15 minutes for the unit to cool down and run the short term test again on its own.

ACB Test Form Document Number: ECP 11-0514a

Version: 2.0

Date: 23/05/2016

Trip Test using Hand-held Test Kit (only if secondary injections tests are not possible)

Overcurrent Trip Test

Close ACB ()

Connect hand-held test kit to STR/Micrologic trip unit using the appropriate test cable and ensuring the correct polarity

()

STR Trip Unit Micrologic Trip Unit

Press short-circuit trip button A – red illuminates or flickers (depending on unit type) ()

ACB operates ()

Check for error messages

Disconnect test kit ()

Earth Fault Trip Test (if earth protection in use)

Close ACB ()

Connect hand-held test kit to STR/Micrologic trip unit using the appropriate test cable. Note: The polarity of the 2-pin test cable has to be reversed

()

()

Connect test kit to STR/Micrologic trip unit ()

Press ground-fault trip button B – red LED illuminates or flickers (depending on unit type)

()

ACB operates ()

Check for error messages

Disconnect test kit ()

© UK Power Networks 2016 All rights reserved 3 of 6

ACB Test Form Document Number: ECP 11-0514a

Version: 2.0

Date: 23/05/2016

Reverse Power Relay Operation (if fitted)

Open transformer links ()

Close HV circuit-breaker ()

Close ACB ()

Connect test set B by plugging the 12-way Jones socket into the test set and inserting relay test plug into relay

()

Check that the screw caps are over the screws at the bottom of the RPR ()

Check that the 6A potential fuses are in place ()

Check non-operation of overcurrent elements at 8A

SW1 Position M1 Current Action Confirm

IR8/25 8A Red phase element contact remains open ()

IY8/25 8A Yellow phase element contact remains open ()

IB8/25 8A Blue phase element contact remains open ()

Check operation of overcurrent elements at 10A

SW1 Position M1 Current Action Confirm

IR10/25 10A Red phase element contact closed ()

IY10/25 10A Red and yellow phase element contact closed ()

IB10/25 10A Red, yellow and blue phase element contact closed ()

Check operation of directional elements at 10A with 25 and 50V

SW1 Position M1 Current Action Confirm

IRYB10/25 10A Directional element contacts remain open at 25V ()

IRYB10/50 10A

Directional element contacts close at 50V ()

Auxiliary trip relay flag operates ()

Red light on test set illuminates ()

Check drop off mode of directional elements at 5A

SW1 Position M1 Current Action Confirm

IR5/50 5A Red phase element contact opens ()

IY5/50 5A Yellow phase element contact opens ()

IB5/50 5A Blue phase element contact opens ()

Check trip operation ()

Check intertripping operation ()

© UK Power Networks 2016 All rights reserved 4 of 6

ACB Test Form Document Number: ECP 11-0514a

Version: 2.0

Date: 23/05/2016

Emergency Trip (if fitted) ()

Check shunt trip coil voltage is correct

30V Connected to terminals K7 and K9 and K7/K9 links removed

240V Connected to terminal 5 and earth

Check emergency trip button operates circuit-breaker

SCADA Checks (MW ACBs only if RTU fitted) ()

Reconnect umbilical cable to RTU

Check remote open and close operation

Final Checks ()

Neutral-earth bond installed between transformer neutral bushing and transformer tank earth terminal (where ACB is mounted directly on the transformer). Note: This configuration cannot be used at a site with separate HV and LV earths

All links are replaced and secure

Spring charged

Asset data form completed and submitted

Test Equipment

Purpose Make/Type Serial Number

Certification ()

All tests have been completed satisfactorily

Comments

Commissioning Engineer Signature Date

The completed test form shall be left on-site in a plastic wallet. A copy of the completed test shall be sent to the relevant ART mailbox (ART.EPN@ukpowernetworks.co.uk, ART.LPN@ukpowernetworks.co.uk, ART.SPN@ukpowernetworks.co.uk).

© UK Power Networks 2016 All rights reserved 5 of 6

ACB Test Form Document Number: ECP 11-0514a

Version: 2.0

Date: 23/05/2016

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© UK Power Networks 2016 All rights reserved 6 of 6

ACB Test Form Document Number: ECP 11-0514a

Version: 2.0

Date: 23/05/2016

LV Cabinet ACB Schematic Diagram (EEER4-WD2)

ACB Test Form Document Number: ECP 11-0514a

Version: 2.0

Date: 23/05/2016

LV Cabinet ACB Schematic Diagram (EEER4-WD4)

ACB Test Form Document Number: ECP 11-0514a

Version: 2.0

Date: 23/05/2016

Transformer Mounted ACB Schematic Diagram (EF-25775-D)

ACB Test Form Document Number: ECP 11-0514a

Version: 2.0

Date: 23/05/2016

Wall Mounted ACB Schematic Diagram (EXWM-2-M-WD)