Answer Posted / vk jha

Primary winding is used for giving in-put and secondary
winding is used for taking desired out-put. Any change in
input causes variation in out put side. Hence tap changer
is placed at secondary side so that tap changes according
to input and keeps giving desired output.

Can we indroduce the principle of single phase induction mator to Transformer? i.e. by Producing rotating flux in the transformer.

2284

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how can we say that stator magnetic field rotates with synchronous speed?can we derive?

1753

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checking procedure of capacitor based motors.used in fans etc?

2093

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What is the BS(British Standard)code for 11kv motor

4963

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What is the function of RCBO? What are the different sensitivity ratings & each application?

2795

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what happened when we supply a dc current in dc motor?? can it worked properly?

1937

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how to find the Motor,s insulation Power?

1741

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I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

2296

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Why the dc voltage drop during starting of emergency lube oil pump? The Voltage drop from 135kv to 125 kv for one min. before re-establish to 135kv?

2291

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How may I enrol or get admission to your program?

1890

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wat is d diffr btw shunt coil and trip coil in VCB?

2818

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how does an centrifugal and screw type chiller will work. which chiller efficiency is high and why.

2265

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Why AC & DC capacitor are use in UPS ??????????????????

2094

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if we apply 1000ADC instead of 100ADC or We apply 50ADC instead of 100ADC,What will be happened in the test result value.Pl explain

1287

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What are marginally stable systems?

1076

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