Answer / sunil shelake

A relay is device that detects the fault and initiates the
operation of the circuit breaker to isolate the defective
element from the rest of the system.

Answer / thowsif_emerson

A relay is an electrical switch that opens and closes under
the control of another electrical circuit. In the original
form, the switch is operated by an electromagnet to open or
close one or many sets of contacts. It was invented by
Joseph Henry in 1835.

Answer / mantu

A relay is a sensing device which sense the fault on the
system and gives the trip signal to the circuit breaker.

Answer / kabilan

relay is act as a switching device &coil energised at the
time contacts are open

Answer / yuvaraj

Relay is only cut off the unit when flow of current more
than it's range set by electromagnetic contact.

Answer / mohammed yousuf khan

A Relay is a device which senses the fault in the circuit and sends signal to the Circuit Breaker to break the circuit.

There is a difference between a relay and a circuit breaker, both are entirely different.

In a circuit, duty of Relay is to sense the fault whereas Circuit breaker should break the circuit upon receiving signal from the relay.

In a circuit, Relay as Master and Circuit Breaker as Slave.

Answer / rajeev

Relay is an electromagnetic device.

Answer / ksnmurthy

relay is having normally close normally oepn contacts are
there so operation wise we can use relay by switching on
and off according to circuit

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