why making capacity is more than breaking capacity?

Answer Posted / vivek malhotra

Suppose the breaker is closing and at the same time a fault
occurs, then at that stage the arc will be very high due to
inrush and short circuit. But in case of breaking a circuit
when current is already flowing, the arc produced is less
as compared to during making of a circuit.
Hence the making capacity is always greater than breaking
capacity

Is This Answer Correct ?    1 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

explain me the relation between torque, frequency,speed,voltage and current in the 3 phase induction motor?

1757


when elecromagnatic waves are propogated in a wave guide?

1496


I meggared my 2c*70 sq mm AL AR XLPE cable. its one end show 50 M ohm . is my cable is safe for laying. I have only one phase and neutral.

1348


1. The DC generaror,s induced output emf is connected with a DC motor(as load). when increasing the load of the motor by using brake drum or any way. what are the parameters will changes in both motor and generator(voltage, current, resistance, frequency, speed, torque, power, flux etc...) 2. Similarly for AC generator and AC motor 3. similarly if using DC batteries instead of DC generator, What happens?

1696


What will be the current drawn by HT motor, if low voltage is applied.. any formula to calculate the LT amps of HT motor.?

1016






in general it is observed in power stations, the tertiary winding is used in higher rating Y-Y auto transformer but not in Y-Y power transformer. is the tertiary winding is compulsory then why it is not using in power transformer 

1302


why on delay timer used for fully automatic star delta starter?

1213


During Testing of Maintenance Free Earthing, How deep should be the Spikes of Earth Test Meter should be inserted in the soil(one spike is 15 Meter & Other spike is 30 Mtrs away from the Main Earth Electrode. Because, recently, we observed that when spike is inserted 3-4 Inch in the earth- results are better, If spike is inserted 1 feet deep than results are increasing.

1447


What is ignition module of a CAT Gas Genset G-3508 Engine, Alternator SR4B Series. HOw its checked for correct functioning.Is it repiarable or replacable?

1738


how to prepare the technical test

1623


How to reduce the static electricity producing in solvent room? By P.D.Patil BioCon

1583


What is meant by time harmonics and space harmonics?

2372


Define damping ratio.

785


How much depth n width required for laying of 1X70 Sqmm Cable in Desert???

1216


How may I get the maximum current capacity for a particullar size Alluminum or Copper cable if there is compulsion to use?

1458