Answer / sanjay n

Relay is a electromechanical switch which requires AC/DC
supply to operate it.By giving the reqired supply the coil
get magnetised and it makes or breaks the contact.

Answer / ravindra reddy

Relay will operate when is there any fault occurs on ckt the
fault information will send to circuit breaker and trip
it.so finally the circuit will protected.

Answer / lrankin

A relay is an electro-mechanical device which is used as
switch. The control side has a coil which when energized
(with the rated current) will produce a magnetic field
which will attract an electronic arm to a contact which
will then allow the relay to turn on a device such as a
lamp.
An AC relay works the same way with one difference.
Another coil is used along with the normal coil used in a
relay to supply some opposition when the coil is seeing the
voltage go negative. Since it holds it's magnetic charge
long enough to oppose the turn off of the main coil, the
relay will stay engaged and not chatter.

Queensborough Community College All The Way!!!

Answer / j.santoshramanakumar

sorry still studied about switchgears so i thought it is a
switch

Answer / a

U both are wrong i m correct

Answer / j.santosh ramana kumar

relays are the switches like dpst,dpdt etc

what dose the arrow indicate in the symbol of power transformer?

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1 Answers  

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0 Answers  

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0 Answers   Premier,

it says in neutral wire current flows under normal condition, but when we put tester it wont glow, why?

7 Answers   HCL,

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difference b/w current and voltage relay?

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1 Answers   SSC,