Answer Posted / raul

auto- transfomer is used bcoz of its efficiency n ability
to conduct by tranfomation n elecrically and wide range of
voltage variations available ............it is used in
starting 3-phase induction motor..........variac in
laboratory, for voltage control in power system etc

difference between servo motor and synchronous motor

2325

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Under wat condition statcom operates as an inductor for the transmission line?

1934

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I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

2269

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how braking & making capacity of circuit breaker are calculated?

2295

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How impulse levels are calculated that for 11kV impulse is 75kvp, for 24kV impulse is 125kvp ?

2000

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Why is remote backup preferred to local backup?

2067

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if the load is 80 amp for main fuse and 100 amp for breaker so how can we calculate the cable size (cooper ) .

2069

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Does all the output contacts (N/O as well as N/C) of a Numerical relay operate when relay receives a binary input/inputs or contacts are designated to specific logic input/inputs and only these contacts operate?

2078

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State the other types of Air Conditioners?

2053

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Please explain me about Relay curves and their sources to read ?

1808

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what is the relative size of single and three phase?

1883

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what is meant by surge? what we called for high currents?

2019

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What is the resistance of the field winding of a d.c. Shunt generator kept low?

1110

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Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.

2140

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If we need 4c× 50mm sq cable but it's not available so we can pull 4c×25mm sq two cables?

1407

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