Answer / k.prakashchandra

I think it is called so ,as the closed position remains in memory (( L M D ) to give ' auto trip ' indication .

in slip ring motor if motor specification is given how we calculate its rotor resistance in starting

1 Answers  

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What is use of reactor..how it is help ful in electrical system .....brief explain

1 Answers  

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How many types of relay are present in a VCB and ACB, what are the tests we can conduct on both breakers and how to set the relays values

2 Answers   Hyundai, Sodexo,

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what is the power factor

13 Answers   Heidelberge Cement,

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why should a transformer be never connected to dc supply

5 Answers  

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tell 2 reasons for why only copper is used in domestic wires& only alluminium in transmission lines ?

10 Answers   ABB,

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how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?

0 Answers  

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how we calculate full load current of A.C & D.C Motors?

1 Answers  

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is tree is a good conductor and it may be used for conductor?

3 Answers  

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What is core CT & it's function?

0 Answers  

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what is the synchronous timer ? and it applications.

0 Answers   CPCL,

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How do we measure earth fault current in Generator Transformer(20/420kv),Station Transformer(20/11 kv) and Unit Transformers(20/11kv) for our plant system, since these don't have any Neutral earth Fault relay connected to their Neutral Earth? But for Unit Service transformers(11/.433 Kv) we have an Earth Fault Relay connected to its neutral earth.Why is such so?

1 Answers   NTPC,

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