Answer / raj kumar moudgil

CIRCUIT BREAKER IS A SWITCHING DEVICE WHICH CAN OPEN AND CLOSE THE CIRCUIT , DURING NORMAL AND ABNORMAL ( FAULT) CONDITION .
IT MAY BE ACB,VCB,OCB AND SF6 TYPE.
PROTECTION DEVICES ARE RELAYS WHICH GIVES COMMAND TO TRIP CKT OF C.B. WHEN FAULT OCCURS.

Answer / aruna

A circuit Breaker can make or break a circuit at fault
conditions.

Answer / muhammad ashraf

a circuit breaker is device whitch controls a circuit in
condintions of abnormal current in the circuit, abnormal
load, or voltages. mean while this is a prtacotor for the
electrical circuit and for isulation of the circuit from
the power supply.

Answer / vishwa theja c

CIRCUIT BREAKER IS OVER CURRENT PROTECTIVE DEVICE WHICH CAN BE OPERATED MANUALLY OR AUTOMATICALLY UNDER ABNORMAL CONDITIONS.IT IS REUSABLE PROTECTIVE DEVICE UNLIKE FUSE.

Answer / surendra yadav

circuit breaker is proctective equipment which proctect the
main circuit to fault condition by opening its contact
electrically as well as mechanically by recieving the
signal from protective relay.

Answer / muhammad ashraf

A circuit bracker is a isolation device which save the load
circuit from abnormal condition, like over current of the
rated capcity of the circuit, when over current flow from
the circuit, bimatelic strip works and trip the circuit
breaker and circuit breaker isolate the main circuit to
load circuit. So, this is the protactive device which
isolate the circuit from the mains in abnormal condition.

Answer / farrukh

circuit breaker save the main circuit at unwanted
conditioin .such as high voltage,

Answer / guna

the name it self contains which break the circuit during the faulty conditions. it is a over current protection device, whenever the fault has been occurred on line it separate the healthy condition of a circuit from the faulted one. it has mainly two parts moving contact and fixed contact by using these two contacts it can make or break a circuit.

Answer / santosh

circuit breaker is used to isolate the circuit from main circuit when relay give signal to circuit breaker when fault accure

what happan when ac power transmitted in unity power factor

12 Answers   JE, Maihar Cement,

Why we transmit the power at the voltage in the multiple of 11 or 1.1 like 11kv, 22kv, 66kv, 132kv...... some one told me that it is due to fomr factor 1.1 of sine wave. its fine but while transforming we can choose any voltage, so why only multiple of 1.1 there also.......? plz tell me.

7 Answers  

if 6 earth pit value is 1.5 ohm then what should be the number of earth pit to make the value .8 ohm

0 Answers  

How to Calculate Transformer Earthing Electrode Rod Size both Body and neutral Earthing ? Any Standard Formula? Please Suggted

0 Answers   EnPro,

Why we are using air gap magnetic condutors

2 Answers   Ford, IOCL,

Transformer Specification say 66/11KV, 23/27/35MVA OFDAN,what is OFDAN? we know ONAN,ONAF or OFAF

2 Answers   Siemens,

can we identify the direction of power flow in transmission line by after only looking the tower

7 Answers   TNEB Tamil Nadu Electricity Board,

corona happens more in ac or dc?

5 Answers   MAHINDRA,

How big (size) can the tertiary winding be in transformer? Can we load the tertiary winding, if yes then how much we can load it?

1 Answers  

WHY DOES NEUTRAL DO NOT CARRY EVEN THOUGH IT CARRIES RETURN CURRENT?

4 Answers  

We have one Energy meter for Measuring the voltage,current,power,energy(KWH,KVARH,KVAH) & power factor.The problem is that the meter does not show whether the PF is lagging or leading.So i want to know that is there any way or calculation to find out that whether the PF sign (lagging or leading) depending upon the above mentioned parameters?

4 Answers  

We operate a 10 Mw facility and we have been experiencing several trips due to fluctuations on the MVAR? We have checked all issues related to the AVR and we have found all OK? Can anyone help us? The grid voltage, internal voltage, all regular parameters look ok. MVAR fluctuate and there it goes the unit? What could be happening? Thanks!

5 Answers