TM* FS* RSW1 to RSW2 RSW1 to RSW2 to CB Closed Closed Open Closed L1 - L1 L1 - L1 - L1 L2 - L2 L2 - L2 - L2 L3 - L3 L3 - L3 - L3 Open Closed L1 - L2 (RSW1) L2 - L3 (RSW1) RSW1 RSW2 CB Terminals Under Test Continuity Earthed Open Open RSW1 L1 - E L2 - E L3 - E Open Earthed Open RSW2 L1 - E L2 - E L3 - E * TM - transformer-mounted and FS - free-standing. HV Insulation Tests using Test Voltage from ECS 11-0006 Switch/Circuit- breaker Position Terminal Voltage Duration IR (kV) (min) (M) RSW1 RSW2 CB Under Earthed Test TM* FS* RSW1 RSW2 CB (FS* only) Closed Closed Open Closed L1 L2, L3 Closed Closed Open Closed L2 L1, L3 Closed Closed Open Closed L3 L1, L2 Open Closed Open Closed L1, L2, L1, L2, L1, L2, L3 L3 L3 via Tx earth Closed Open Open Open L1, L2, L1, L2, switch L3 L3 * TM - transformer-mounted and FS - free-standing. FPI CTs Insulation Resistance using 1kV Test Voltage (test from marshalling box) Disconnect FPI/RTU (if fitted) () Remove CT wiring earth link C70 - C70 () L1 C10 - Earth M L2 C30 - Earth M L3 C50 - M Replace CT wiring earth link C70 - C70 ()
TM* FS* RSW1 to RSW2 RSW1 to RSW2 to CB Closed Closed Open Closed L1 - L1 L1 - L1 - L1 L2 - L2 L2 - L2 - L2 L3 - L3 L3 - L3 - L3 Open Closed L1 - L2 (RSW1) L2 - L3 (RSW1) RSW1 RSW2 CB Terminals Under Test Continuity Earthed Open Open RSW1 L1 - E L2 - E L3 - E Open Earthed Open RSW2 L1 - E L2 - E L3 - E * TM - transformer-mounted and FS - free-standing. HV Insulation Tests using Test Voltage from ECS 11-0006 Switch/Circuit- breaker Position Terminal Voltage (kV) Duration (min) IR (M) RSW1 RSW2 CB Under Test Earthed TM* FS* RSW1 RSW2 CB (FS* only) Closed Closed Open Closed L1 L2, L3 Closed Closed Open Closed L2 L1, L3 Closed Closed Open Closed L3 L1, L2 Open Closed Open Closed L1, L2, L3 L1, L2, L3 L1, L2, L3 via Tx earth switch Closed Open Open Open L1, L2, L3 L1, L2, L3 * TM - transformer-mounted and FS - free-standing. FPI CTs Insulation Resistance using 1kV Test Voltage (test from marshalling box) Disconnect FPI/RTU (if fitted) () Remove CT wiring earth link C70 - C70 () L1 C10 - Earth M L2 C30 - Earth M L3 C50 - M Replace CT wiring earth link C70 - C70 ()
ECP+11-0511d+Lucy+SCRMU%2C+VRN+and+VRN2+Test+Form.docx