ACB Test Form / 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(kV) / Insulation Resistance
Transformer 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 NextTest 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 ECP110514) / ()
Press Next and ensure all four options read Enabled on the Configure Automatic Trip Curve Test screen / ()
Press Next and thenYes 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.
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 / ()
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 / ()
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 onlyif 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(, , ).

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ACB Test Form / Document Number: ECP 11-0514a
Version: 2.0
Date: 23/05/2016

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