Answer / raju

Relays are 3 types
1. Mechanical relay
2. electromechanical relay
3. numerical relay
RELAY WILL SENCE THE FAULT CURRENT THROUGH CURRENT
TRANSFORMER AND IT WILL GIVE A COMMAND/ SIGNAL TO TRIPPING
COIL WHICH WILL TRIP THE BREAKER.

Answer / rvg

Relays are electro-mechanical switches, and it needs some
power either AC/DC to operate the activation coil.
As soon as the coil gets magnetised, the contact attached
will make/break.

Answer / anand shukla

a relay is a sensing device ,which sense the fault and give
signal to the circuit breaker.
relay are many types which is is used in different
conditions.
1- electromagnetic relay
2- thermal overload relay
3-directional & nondirectiobal relay.
4- distance relay
5-mho relay
6-trip circuit supervision relay
7- master trip relay.
in realy some types of contacts are fitted
like no and nc which is interchange when current exceed a
preset value it means when relay operated.

Answer / simpal

Relay is basically a switchgear which senses the fault
occuring in the system and give signal to circuit brekar 2
remove the healthy part from the faulty part

Answer / xxx

Sorry santhosh you are answer is not correct.

Answer / chowndaryaa sehar

Relay is the device which will sense and isolate the fault
by giving a signal to circuit breaker with help of a
controller chip.

Answer / ramanharikrishnan

Relays are working with sensation of fault while
occuring in system.

Answer / sindhuja

Relay works with with inputs of CURRENT... VOLTAGE..
BASICALLY- CURRENT OPERATED AND VOLTAGE OPERATED.
Relay has the element.
if the element sense the I or V .. which crosses the set
valve .. then it operates.

Answer / nagesh

Relay is switch which can be operated by rated power supply
at the rated current...Relay consists of NO and NC contact
which operates depending on the Coil

Ex ---NO contact will become Close when relay is activated
------NC contact will open when relay is energised

Answer / bhumi

Relay is one kind of electro mechanical device with is
intended to sence the fault(the situation which is opposite
to its normal operation & as well as the function of the
relay for which it has been made)& to give command to the
circuit breaker immediately to isolate the faulty part from
the healthy portion to save the entire system.

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