In a biased differential relay the bias is defined as a ratio of
A)Number of turns of restraining and operating coil
B)Operating coil current and restraining coil current
C)Fault current and operating coil current
D)Fault current and restraining coil current

Question

Quizplus · Accepted Answer

The bias in a biased differential relay is defined as the ratio of operating coil current to restraining coil current. This helps in stabilizing the relay against external fault conditions and through faults, ensuring it operates primarily for internal faults within the zone of protection.

In a Biased Differential Relay the Bias Is Defined as a Ratio