Classify driling machines.

0 Answers   Essar,

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Can any body tell me about Hi-pot test, and why it is necessary and its procedure of testing

6 Answers  

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what is the difference between 50 hz freq. and 60 hz freq.? which is better and economic in them ?

0 Answers   Faurecia,

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What is the use of conservater, bucchos relay, breather in a transformer?

8 Answers   Bosch, Wipro, Zadco,

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why dc source used for HV breakers and Relays operation?

2 Answers   Cethar,

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On a 3 winding transformer YNynd11, how do you apply REF protection to the Delta tertiary winding that is supplying auxiliaries to a substation?

0 Answers   Kwekwe Polytechnic,

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what is earth-fault?when it occurs? to check where it occurs what type of test should we do?

0 Answers   ONGC,

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Why dc voltage used to excite alternator field in stead of ac?

4 Answers  

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why transformer not work in dc

16 Answers  

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how the high voltages are produced?and what it causes?

4 Answers  

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IS THE ANY DIFFERENCE B/W GENERATORS & ALTERNATORS

6 Answers  

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why we use star connection in HT motor? and delta connection in LT motor

2 Answers   npcc,

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