Answer / ashish

a breaker has a fixed and moving contacts.
after closing of the breaker the resistance between
this contact is called breaker contact resistance and its
value is in few micro/milli ohms.

Answer / hiranmoy chatterjee

Contact resistance of SF6 CB will be less than 40 micro ohm.

An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The slip when motor stalls is A 1 B 0 C 13.33% D 10.33%

0 Answers  

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How select ELCB for 32amp. socket having quantity 12Nos. We have to do this wiring in PLANT. Please Also explain the incoming cable specification.

0 Answers   Gulf Industrial Services Company GISCO,

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what is the difference between neutral

10 Answers  

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Why the CT Secondary is rated as 5A generally?

2 Answers  

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Which pump set is more suitable and economical for liftingwater from 300Mtr borewell? A. Compressor Pump B. Submersible Pump C. Jet Pumps D. 25HP Centrifugal Pump Q. from PSC Test 22-11-2008 Meter reader

8 Answers  

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If a HV Underground Cable (13.8KV) is layed in the ground below 1.5 Mtrs and any building construction is done on the Cable route. IS this allowable or Not? What should be the clearance. As per ISO construction on HV cable route is safe or Not? Why? Can any body suggest the site for my question?

1 Answers   ZCL,

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how induction motor work as a generator?

2 Answers  

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Can we convert off load tap changer transformer to on load tap changer transformer

2 Answers  

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How many losses in generators? how we can reduce them? and also in motors,transformers?

1 Answers  

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a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn

0 Answers  

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what is extra low voltage system

3 Answers  

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why ac wave is sinusoidal not square or triangular wave what will be reason

1 Answers   ACPL,

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