Differential Unit Level 1 (F87 1) - GE Multilin MIB Instruction Manual

8.12 DIFFERENTIAL UNIT LEVEL 1 (F87 1)

8 RELAY COMMISSIONING
8.12DIFFERENTIAL UNIT LEVEL 1 (F87 1)
Enable only 87 1 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.
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8-12 MIB High Impedance Bus Differntial Relay GEK-106426B