Answer Posted / vijay

only one type

Inverter. converter. Ups.MCB.solar.alternators. motors.

1998

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if the armature current in a dc generator is ac ( sinusoidal ) why doesnt the sjhape af armature mmf a sinusoidal (ni) ? armature mmf in case of a dc machine is triangular.

1970

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is all the servo motors having brake?please specify which servo motors having brake for stop on position and which are not.

1788

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how do i commission a distribution transformer knowing all its ratings and transformation ratios?d

4583

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how to measure earth resistance of a substation

3324

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Vaccum circuit breaker

1390

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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?

2760

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If the rated speed of a d.c. Shunt motor is1440 r.p.m, which method of speed control would you suggested to obtain a speed of 1500 r.p.m?

1151

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what is smart grid? why we use it? explain in detals bcoz i want give presentatin from it....

1946

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is ac supply can store

2102

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it is possible to measurement of tension of slipring induction motor(SRIM)carbon brushes, any maesuring instruments are available in the markets.

2014

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Please explain me abt PQ diagaram in the power sector.

2419

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difrent between vcb acb sf6 and mccb breakers

5436

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i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.

1921

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Mention the methods for starting an induction motor?

1154

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