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Document Number: ECP 11-0511c Date: 25/11/2015 SCHNEIDER CN2 AND CE2 TEST FORM Substation Name Substation Number Voltage Switchgear Installed Mode Free-standing () Switchboard Number Manufacturer Serial Number Type Transformer-mounted () Schneider Protection CTs Ratio in Use TLF Rating Transformer Rating Preliminary Checks kVA () Visual inspection satisfactory (no visible signs of damage etc) Earthing satisfactory SF6 gas pressure satisfactory Functional/Interlock Checks () Open and close circuit-breaker Earth switches cannot be operated when service selected Circuit-breaker cannot be operated when earth selected Open and close earth switches Test access cannot be opened when circuit-breaker in On and Off position Test access can be opened when earth switch closed Circuit-breaker cannot be operated when test access open Transformer Winding Insulation Resistance using Test Voltage from ECS 11-0006 (transformer-mounted units only) HV windings to earth (LV windings connected together and to earth) M LV windings to earth (HV windings connected together and to earth) M THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE Version: 4.0 Schneider CN2 and CE2 Test Form Document Number: ECP 11-0511c Version: 4.0 Date: 25/11/2015 Switchgear Continuity Test Circuitbreaker Terminals Under Test Circuitbreaker Terminals Under Test Closed L1 - L1 Earthed L1 - E L2 - L2 L2 - E L3 - L3 L3 - E Continuity Continuity HV Insulation Tests using Test Voltage from using Test Voltage from ECS 11-0006 Circuit-breaker Closed Open Terminals Under Test Earthed L1 L2, L3 L2 L1, L3 L3 L1, L2 L1, L2, L3 L1, L2, L3 Voltage (kV) Duration (min) IR (M) Protection CTs Insulation Resistance using 1kV Test Voltage Remove CT wiring earth link C70 - C90 () CTs, AC trip coils and TLFs C70 - Earth M Replace CT wiring earth link C70 - C90 () Protection CTs Loop Continuity (test CT and trip coil from TLF ratio terminal block with test link removed) Remove shorting link and test link () 100/5 Ratio 50/5 Ratio L1 C110 - C70 C210 - C70 L2 C130 - C70 C230 - C70 L3 C150 - C70 C250 - C70 Replace shorting link and test link () Test Link C90-C70 C110-C130-C150-C70-C210-C230-C250 100/5 50/5 © UK Power Networks 2017 All rights reserved 2 of 4 Schneider CN2 and CE2 Test Form Document Number: ECP 11-0511c Version: 4.0 Date: 25/11/2015 Primary Injection Test (free-standing units only) Earth Fault Release Test Remove TLFs and replace with shorting links () CB Conductors Under Test CT Ratios Trip Range Closed L1 - L1 50/5 20 - 26.5A A 100/5 25 - 31A A 50/5 20 - 26.5A A 100/5 25 - 31A A 50/5 20 - 26.5A A 100/5 25 - 31A A L2 - L2 L3 - L3 Trip Current Overcurrent Release Test Remove TLF shorting-links, connect shorting-link to L1, L2, L3 on one side CB Conductors Under Test Closed L1 - L2 Short Conductors L2 - L3 () CT Ratios Trip Range Trip Current 50/5 20 - 25A A 100/5 30 - 36A A 50/5 20 - 25A A 100/5 30 - 36A A Secondary Injection Test (transformer-mounted units only) Earth Fault Release Test Remove TLFs and replace with shorting links () CB Test Connections CT Ratios Trip Range Trip Current Closed C31 - C70 50/5 2 - 2.65A A 100/5 1.25 - 1.55A A Overcurrent Release Test Remove shorting links () Circuit-breaker Test Connections CT Ratios Trip Range Closed C11 - C31 50/5 1.6 - 2.2A A 100/5 1.4 - 2.0A A 50/5 1.6 - 2.2A A 100/5 1.4 - 2.0A A C31 - C51 Trip Current Note: If the circuit-breaker does not operate when the injected current is gradually applied then the maximum value of current should be applied instantaneously. © UK Power Networks 2017 All rights reserved 3 of 4 Schneider CN2 and CE2 Test Form Document Number: ECP 11-0511c Version: 4.0 Date: 25/11/2015 Final Checks () Check correct CT ratio selected Check correct TLF rating selected and fitted Check all links are replaced and secure Asset data form completed and submitted Test Equipment Make/Type Serial Number Calibration Date 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 and in secure location. A copy of the completed test shall be sent to the relevant ART mailbox. © UK Power Networks 2017 All rights reserved 4 of 4 Schneider CN2 and CE2 Test Form Document Number: ECP 11-0511c Version: 4.0 Date: 25/11/2015 Appendix A – CN2/CE2 Schematic Diagram © UK Power Networks 2017 All rights reserved A-1