Answer / prasenjit maity

What is hypo test for H T cable

Answer / velappan

normally the hypot test is carriedout by DC only
but for AC ,huge size equipment is required for testing

there are a transformer and a motor. both are connected to 3phase, 415 Volt, 50Hz power supply. Both are working with induction principles. Then, why, motor is rotating and transformer is not rotating.

8 Answers  

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why we are grounding the neutral?

1 Answers   GE,

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Pl.brief me about Electrical power distribution system from Main generating station to Industry.What is the use of in between station.

0 Answers   ARDE,

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why it is mentioned as 8/10 mva transformer why not directly 8mva or 10mva transformer. please explain me the full detailed reason.

4 Answers   Qatar Gas,

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In aircraft,why we use 400 htz equipment.and use common earthing

1 Answers  

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Mention what are the different colors on wires indicates?

0 Answers  

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what is the difference between power transformer & distribution transformer and what are their ratings respectively?

4 Answers  

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why it is necessary to maintain frequency constant in a power grid ?

1 Answers   NTPC,

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if 1hp jet motar drop voltage when start from 220v to 120v give the reason and solution.

1 Answers  

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Why neutral point is consider as zero potential?

0 Answers   Equate,

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transform oil how going to act like ainsulation purpose

1 Answers   Siemens,

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What is Negative Potential Bias

0 Answers   TATA,

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