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

Define non-touching loop.

0 Answers  

ohms law is applicable for dc or ac current or for both??? explain it berifly??

3 Answers  

What is power factor? How to improve Power factor? draw a circuit diagram showing the connection of power factor improvement equipment to the electrical instillation.

1 Answers  

in HVDC transmission system ,monopolar link has one conductor usually a negative polarity and use ground or sea return ?through negative polarity we could pass electricity or not yes means how it is possible

1 Answers   Gyana, NNN,

why and how fault current flows through ground?

1 Answers  

what is the spdt

1 Answers  

I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.

0 Answers  

why generator efficiency is more in swinburnes test?

0 Answers  

What are the conditions to be satisfied for parallel operation of dc generators?

0 Answers  

how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com

0 Answers  

Why the transformers are rated in KVA ? in new view

3 Answers  

Hi everyone, I'm Lachuu, recently joined automation company as PLC Engineer. I have certain basic question, I request all big gurus and seniors to answer these question. Because this will be very helpful to me as well starters like me. How to design a control circuit (ex: pick & place - my current project) Yamaha robot PxYx series controller RCX222, using 6 cylinder double acting, plc keyence kv p16r 2 expansion unit for input and output each. How to select panel terminal mcb elcb powersupply. My main concern in some projects how to select dc power supply, mcb rcb(I came across dif bt b c d curves, but stil confusing, pls help me :-(. I would really appreciate all who are going respond to this question.

0 Answers