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

1 Answers   NTPC,

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what is -24vDC and how can generate this -24vDC

1 Answers   Blue Star,

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how many units (kwh) are there if in one MW?

5 Answers  

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What is transmittance?

0 Answers  

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11 KV Power cable end earth connection insulation got burned wht is the reson pl give the resons

2 Answers  

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if neutral earthing is weak of a system then how can we improve it ? Technically explanation ??

1 Answers   CS, L&T,

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can we use ps class in combination with protection class in differential protection and over current protection.

1 Answers  

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What is the Diff. btw Fire Alarm System & VESDA System??????

1 Answers   Emerson,

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will a bulb glow connected to two phases of a delta connection?

6 Answers  

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Amoung all classes of electric machines, why the transformer uses oil as one medium of cooling?

4 Answers  

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At what factor resistance r of a conductor depends?

0 Answers  

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How to size Air Circuit breaker (ACB)? What is the most important factors?

0 Answers   ABC,

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