What is the difference between an over current relay and current differential relay?
Answers
Answer:
OVER CURRENT RELAY:
Over current relay. An over current relay is a type of protective relay which operates when the load current exceeds a pickup value. ... When the relay operates, one or more contacts will operate and energize to trip a circuit breaker
DIFFERENTIAL RELAY:
A differential relay is defined as the relay that operates when the phasor difference of two or more similar electrical quantities exceeds a predetermined value. ... The relay is connected in such a manner that the difference between current entering and current leaving flows through the operating coi
Answer:
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♥ The operating coil of over current relay is connected across the CT secondary circuit.
♥ This differential relay compares the current at the two ends of the alternator winding.