How Arc Produced in Circuit Breaker When the contacts of the circuit breaker open.

1 Answers  

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1)which height building required lightning arrester? 2)how to calculate the requirement of lightning arrester? 3)what is the pro instrument? 5)how to test protective relay like overload?earth fault relay?

1 Answers  

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what is stper motor.what is its uses

9 Answers   Bhel, HCL,

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why impudance relay used for medium transmission power system? why not others?

0 Answers  

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I want to know the currect formula for industrial lighting lux caluculation & light fittings selection

2 Answers   MRF,

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What does negative slip of an induction motor signify?

10 Answers   Tata Elxsi,

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How to design CT for connected with Transformer OLTC operation? normally CT output design for 1A/5A range but during OLTC Tap position changing time how to function the CT?

1 Answers   HEG,

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Single line diagram for dbb (double bus bar)system.

0 Answers   KSEB, L&T, Siemens,

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how can we check the earth resistance

3 Answers  

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Define rise time.

0 Answers  

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what is sf6 where it is use & working or function ?

5 Answers  

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transformer 3 ph, 225 kva pri 480v, sec 208v. primary neutral connected to system, is secondary neutral to be grounded and how

1 Answers  

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