Answer Posted / btln

The circuit breaker closing time depends on the mechanisim
of the circuit breaker,normally the opening time should be
less to trip the breaker in short time to prevent the exess
arcing of the contats else it may damage the interrupter
during the arcing period.and for closing time the circuit
breaker mechanisim will take longer time to close the
breaker and it will be maintained with effective load with
contact loading springs to prevent pre arcing.

when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)

1998

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what is the step by step formula for calculating bus bar phase and neutral size of a panel board.suppose the incomer of panel board is 100A..???step by step answer please

3768

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What is the minimum underground tank size capacity considered for firefighting purpose?

1962

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hello!my name is sheikh iam preparing for indian engineering servieces,please send me the old question papers..to sheikhshaazforjobs@gmail.com

2090

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how to get electrical supervisour certificate in gujarat

1965

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how to deside the capacity of chock for drive?

2060

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What are the causes for the failures of sandwich type (Al) busducts?

1866

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how ct burden,magnetising current,ratio and knee point voltage are related & derived

2203

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WHY SEPARATELY EXCITED MACHINE NEEDS EXCITATION BY DC SUPPLY WHY NOT BY AC

1899

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Why the frequency of ac in india is 50 hz but in some other countries it is 60 hz.

2137

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a starter used for squirrel cage induction motor?

1686

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we have amp, voltage, kw, length detail then how to calculte copper & alluminium size of conductor of 3-phase induction motor

1463

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If oil and air can withstand a high MeV when used as an insulator in a transformer, what are the values of how high for each material?

1894

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What do you mean by transformation ratio of instrument transformer?

1096

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what is PWM in IGBT and how it works for drive.?

1664

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