Answer Posted / prmdptl2009

if an AC induction motor is applied with DC voltage,then due
to unavailability of change in flux as in AC,the induction
will not be possible. also in case of dc supply the motor
winding will not be able to withstand for long time and at
last the motor winding will be damaged.

what is per unit calculation?looking for simple and strong explanation thk u

2899

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Whether the vacuum contactor requires Short circuit protection?If No,why?

2052

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What do you mean by a current transformer?

1102

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Why it is possible to use PWM with a STATCOM and not with a conventional TCR based SVC

2123

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can i use 4 number of circuit breaker as single phase manual change over switch? if yes then how plz also send ckt diagram at nazimzamurad@gmail.com

2134

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What is dynamo?How it works and what is the function of dynamo in a DG.

2593

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What is difference between unity power factor wattmeter and upper power factor wattmeter? In short circuit test of transformer the wattmeter used is unity power factor type or upper power factor type wattmeter?

2768

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Sir, I m 3rd year student 4m DCE and want to do internship in siemens or l&t or any other mnc related to electrical engineering. please tell me the procedure 4 same and oblige me

1990

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how technical is calculated in 11kv line and lt line

2064

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Explain the operation of variable frequency transformer?

1151

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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?

2090

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What are marginally stable systems?

1107

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what is the voltage rating of chiller unit sensors

2781

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What is the polarization index value ? (Pi value)and simple definition of polarization index ?

1217

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should %impedance be high or low in a power transformer? if so why?

1932

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