Answer / karthic

relays are the device that give signal to the circuit
breaker during fault condition protecting the system from
further damage.

Answer / manjifera

its a device which control/protects the high voltage
equipments using low voltage which is safe for human.

Answer / motilal sahu

RELAY IS FAULT SENSING DEVICE.AFTER SENSING THE FAULT IT
SEND INFORMATION TO CIRCUIT BREAKER

Answer / kannan

Relay is the combination of NO & NC contact which will be
changed during energizaztion.

Answer / nagaraju .n

it is opperating & controllig divice depending on users

Answer / anindya chitta bagchi

relay is an electromechanical/electronic device,that picks up
when certain conditions are met,and then makes normally closed
contacts open,and normally open contacts closed.

Answer / ecstatic

Relay is a device used in protection system which senses
any abnormal condition in an electrical circuit and
triggers the trip coil \../
it can also be defined as an electromagnetic switch used to
control high voltage through low voltage ..

Answer / sush

Relay is like switch having Normaly open, Normaly close &
combination of both.In relay tere is electro magnetic coil
which is energized when supply is given and atract the
armature to make the contact.

Answer / hemant

relay is an sensing device. it senses the fault condition & energises the CB coil.

Answer / gunnam santosh

basically relays are coils designed for certain current
rating if current flowing through it increases this rating
it gets energised and operates the centrifugal switch placed
in it and opens the switch.

I am having a DG set.The 415 V from Generator is step up to 460 v and then the same is used for Induction furnace. before Step up, I am connecting LT load to my factory use. When Induction furnace is in service from DG, when i try to start a motor, the generator is tripped.Please tell me the reason.

3 Answers  

what is ideal insulator. what are its parameter. Is poecelain insulator comes under this category.

3 Answers  

how do i commission a distribution transformer knowing all its ratings and transformation ratios?d

1 Answers  

what is the contact resistance of Air circuit breaker??

1 Answers  

what could be the RMS value and average value of a 4 phase sine wave?

0 Answers   BARC,

what is the disadvantages of common earthing for AC and DC equipment? (i am talking about inverter control room and inverter duty transformer earthing is common...?)

0 Answers   TATA,

please tell me, how i clear the objective test? when i studied form the one book after i solved the objective ,that time i solved that qes. but if i tried solve objective form the other book then i could not solved these que.

0 Answers  

WHAT IS IEC? & WHAT IS BENEFIT TO PRODUCT FROM IEC?

0 Answers   BMC,

WHY WE NEED NEUTRAL FOR 3PH 400 OR 415 VOLTS POWER SUPPLY (4 WIRE SOURCE).

5 Answers  

Can we check ELCB constantly from R1 to R8 phase in 1 no DB?

0 Answers   Legrand,

I would like to know that the fault curretn at base load and at 10% generation will be same? Fault level of BUS remain same with different generation?

0 Answers  

How to detect voltage vector shifting in interconnection protection.

0 Answers