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

why voltage swells and dips in transmission line?

2 Answers  

the electric traction poles having 3 cables n two cables touches with a insulator (or any) another one separated but it will be running 1-phase why?

4 Answers  

Which one is easy to control AC or DC Machine?

2 Answers   BARC,

How the PF control while running DG set with load

0 Answers  

how much the voltage & resistance should be ,between earth & neutral points.?& why?

6 Answers  

How to take Transformer oil Break down voltage test?

9 Answers  

what is gas turbine intercooling ?

0 Answers  

A motor running with lenze frequiency inverter stops if I REDUCE SPEED with 25% load.If I run it in High speed and medium speed running smoothly with full load.please help me to solve it.

0 Answers  

Whata are the types of Cables?

0 Answers  

What the reson for frequant instantaneous ground over current fault in our sync. Generator... 15 triping in 24 hr...

1 Answers   HCPL, Jhunjhunwala Vanaspati Jhoola, Regen Powertech,

why do we use 25kv supply for traction purpose

1 Answers  

what is amf panel & how it is working

6 Answers   ATS,