difference b/w current and voltage relay?

1 Answers  

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what happen if i change the polarity of ac when it is connected with motor

3 Answers  

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What is the possible cause for failure of lightning arrestors in outdoor substation under normal condition

0 Answers  

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What is the phase relationship between the primary and secondary voltages of a transformer?

0 Answers  

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what is the kva rating of 20 kv transformer?

1 Answers  

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We have 90mX100m hangar with 16 no.of supporting pillar. It is required to provide power supply on all pillars. what is suggested earthing scheme for hangars.

0 Answers   HAL,

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why do we need the body earth?

4 Answers  

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sigal phase supply is 230 v ac two phase supply is 415 v ac then why three phase supply having supply is 415 v ac why not 690v ac

2 Answers  

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What are differences between Voltage, EMF & Potential difference ?

0 Answers  

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I am going to appear for the RRB Chennai Section Engineer online exam. Please send me the question papers from 2001 to date to my mail id:upendrakrishna20@gmail.com,plz send me ,or send any other rrb papers plzzzzzzzzzzzzzzzzzz

0 Answers   RRB,

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how much insulation resistance 11kv & 33kv under ground cable between earth to phase & phase to phase.

4 Answers   Siemens,

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How CFL &T5 tube light glows?

0 Answers   HAL,

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