Table B - Calculate Operating Times Overcurrent Setting Earth Fault Setting Curve (I>) (Ie>) (Tms) (Tms) Time Setting (tI>>) (tIe>>) Tripping time at 2x secondary current Curve SI (Tms x 10s) + 0.09s s s Curve VI (Tms x 13.5s) + 0.09s s s Curve EI (Tms x 26.67s) + 0.09s s s Tripping time at 5x secondary current Curve SI (Tms x 4.28s) + 0.09s s s VI (Tms x 3.38s) + 0.09s s s Curve EI (Tms x 3.33s) + 0.09s s s Tripping time at I>>, Ie>> Overcurrent Highset tI>> + 0.09s s s Earth Fault Highset tIe>> + 0.09s s s (SEF) Relay Operation - Secondary Injection Test Connect timer circuit to terminals 33 (L3/3) and 35 (L5/3) in the marshalling cabinet () (contact closed when CB open) Overcurrent Test Calculated Calculated Actual Operating Times Setting Injection Current Operating Time C11 - C31 C31 - C51 C51 - C11 (from A) (from B) 2x A s s s s 5x A s s s s Highset A s s s s Earth Fault Test Calculated Calculated Actual Operating Times Setting Injection Current Operating Time C11 - C72 C31 - C72 C51 - C72 (from table A) (from table B) 2x A s s s s 5x A s s s s Highset A s s s s SEF* A s s s s * The trip current may have to be increased to operate the circuit breaker if the current is below the minimum operating current. Shunt Trip and Emergency Trip (if fitted)
Table B - Calculate Operating Times Overcurrent Setting Earth Fault Setting Curve (I>) (Ie>) Time Setting (Tms) (Tms) (tI>>) (tIe>>) Tripping time at 2x secondary current Curve SI (Tms x 10s) + 0.09s s s Curve VI (Tms x 13.5s) + 0.09s s s Curve EI (Tms x 26.67s) + 0.09s s s Tripping time at 5x secondary current Curve SI (Tms x 4.28s) + 0.09s s s VI (Tms x 3.38s) + 0.09s s s Curve EI (Tms x 3.33s) + 0.09s s s Tripping time at I>>, Ie>> Overcurrent Highset tI>> + 0.09s s s Earth Fault Highset (SEF) tIe>> + 0.09s s s Relay Operation - Secondary Injection Test Connect timer circuit to terminals 33 (L3/3) and 35 (L5/3) in the marshalling cabinet (contact closed when CB open) () Overcurrent Test Setting Calculated Injection Current (from A) Calculated Operating Time (from B) Actual Operating Times C11 - C31 C31 - C51 C51 - C11 2x A s s s s 5x A s s s s Highset A s s s s Earth Fault Test Setting Calculated Injection Current (from table A) Calculated Operating Time (from table B) Actual Operating Times C11 - C72 C31 - C72 C51 - C72 2x A s s s s 5x A s s s s Highset A s s s s SEF* A s s s s * The trip current may have to be increased to operate the circuit breaker if the current is below the minimum operating current. Shunt Trip and Emergency Trip (if fitted)
ECP+11-0512f+Lucy+VRN6A+with+MiCOM+P124S+Test+Form.docx