Answer Posted / chinna

commutator is unit which converts AC voltage into
Unidirection DC Voltage. The voltage generated in the DC
machine is in alternating nature. Because of this reasion
commutator is attached with DC machine.

Why colled 440V to 3-phase supply.

2079

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The size and construction of bushings in a transformer depend upon?

1720

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What is the difference between indoor and outdoor transformer

5865

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what is efficient motors and how it is different from normal induction motors

1873

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What is the simplest formula to calculate the rotor diameter of a synchronous generator?

2395

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Why slip ring ind. motor power consumption is low compare to induction motor .same 90 kw motor used same load output

1786

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In layman terms, what is the difference of Dielectric strength and dielectric constant when speaking of an insulating oil

2643

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in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?

1798

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Why is ignitor used in sodium vapour lamp

3502

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The gauge indicates the number of amps, but what about voltage? How voltage rating (for wire or fuse) determined?

1943

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do we use neutral grounding for resistive balanced load? if we use what happen?

1753

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How to do cable sizing calculation for 750 A Neutral Earthing resistor for 33kv. the 33kv cable going to swbd. is 630mm2 3 runs.

4724

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before transformer oil dielectric strenght tests are taken the oil should be allowed to settle to remove option 1 air bubbles 2 gasses 3 contamination 4 water

1630

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I WANT TO INSTALL LIGHTING ARRESTOR ABOVE 20 FEET HEIGHT INDUSTRIAL BUILDING. NOW IT WAS 15 FEET HEIGHT HOW MUCH DISTANCE IT WILL COVER & HOW TO CALCULAT THE DISTANCE COVER BY THE ARRESTOR

1919

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What is control system?

1160

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