Answer Posted / dinesh kumar

In earth fault protection the feeder or drive is protected
against an earth fault.In restricted earth fault protection
the complete winding of transformer or generator is not
protected against earth fault depending upon the value of
resistance connected in neutral grounding.If the earth
fault occure in the part of unprotected portion of winding
the eart fault relay will not trip

What is the function of a neutral reactor.

1802

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what is the minimum (Common factor) insulatin resistance of the following a, 4mm sq wire b, cable from 50 mm sq to 800mm sq

2042

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How much ph is maintained of water electrolyte which is used in LRS for 1200 kw slipring induction motor ?

1710

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How relay coordination has to be done? what are the inputs are required for this? Please explain this with calculation method?

1739

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what is mean by dry frequency

2403

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which motor have relatively high power factor and what is reason for have high pf? 1.capacitor run motor 2.shaded pole motor 3.capacitor start motor 4.split phase motor

1908

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What is servo motor and what are different types of servo motor

2331

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which connection is safer series or parallel?usually which connection we prefer at home?

9798

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Define maximum demand?

1011

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what is the formula for efficiency of francis turbine and generator for hydropower? what is best way to select francis turbine and generator?

2448

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what are the available sizes of pin type terminal lugs in the market today?

1794

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in battery charging room we find two fuses (one in positive other in negative cables ).why it is so?one fuse is ore than sufficient?

2200

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how to choose cable size with respect to load? how to convert cable size in mm2 to sq.mm?

5843

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Do you need any help with FEWA Electrical Supervisor exams?

950

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What is resistance reading of earth copper rod with grid and without grid?

1093

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