Answer Posted / shailesh patil

MPCB is a device which gives protection to motor against Overload, Short Circuit & Single Phasing.

But Overload Relay is a device which gives protection to motor against Overload Load & single Phasing only.

oltc of a transformer, how it works? and what are the equipment consist of describe briefly?

2068

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Will any motor burn if voltage provided is lesser than the rated voltage???? If yes, then how is speed control possible with voltage control

2209

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Can we use Ccapacitive voltage transformer directly for metering purpose?

1924

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How a capacitor discharge weld power supply works? what is the use of a pulse transformer?

2117

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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?

2124

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why should the primary of transformer be connected in delta in a heat run test?

2027

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Define norton equivalent circuit?

1111

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Starting times for soft starter & power factor is thier any standard or datas available in manufactures list. Kindly suggest.

1971

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state types of reflectors in illumination engg. ???????

1991

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what is the size of ht cable of 33kv ht line and transformers ratings are 1 Mva and 5mva.please send formula also.

1510

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When a single pase capacitor run motor- run on 230vac and Case(1)run with 8 Mfd 250 vac.capacitor , Case( 2) run with 8 Mfd 400vac capacitor. What is difference between both case regarding power ,efficiency etc?

2108

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how to decide choke rating for drive?

2381

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what shall be no load voltage of 132/33 kV transformer ? is it 33 kv of 34.5 kV

2243

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In ht capacitor ckt we are using LBS Panel it having isolator with fuse, one of HT fuse flash over, so what is reason behind this event.

2145

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How to calculate of maximum demand if given 628kw, 785kva, 0.8 p.f.

1694

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