GEK-106426B
MIB High Impedance Bus Differntial Relay
8-13
8 RELAY COMMISSIONING
8.13 DIFFERENTIAL UNIT LEVEL 2 (F87 2)
8
8.13DIFFERENTIAL UNIT LEVEL 2 (F87 2)
Enable only 87 2 function.
Set its time delay and pickup to 0.1 A
With 0.9 times the pickup current the relay should not trip.
With 1.1 times the pickup current the relay should trip in between 10 to 50 ms.
With 4 times the pickup current the relay should trip in less than 15 ms.
The test should be carried out for phases A, B and C.
