Answer / biren

In overhead line there is air around the bare conductor which is a insulation layer but the earth around the under ground cable is a good conductor. so there is more chance of insulation failure, hence to avoid the normal insulation failure more insulation is provided which increases the cost.

Answer / sk.azhar.m

An underground line is fill in the earth and when if the leakage current will flo in the erth the current rating will very high in the cable that is very dangerous for human and other and in the the overhead line the air is not good conductor of electricity while an underground line is more insulation than overhead line for this reason the insulation cost is more in underground system

Convert a star connected network into a delta connected network.

1 Answers   Syntel, Visa,

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How to find the length of a Xlpe cable required to transmit 3mva load at 22kv.

1 Answers  

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Which type of alternator used in power station?

2 Answers  

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why we use negative feedback in control system.

2 Answers  

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why surge suppressor in vaccum circuit breaker and it is only in motor feeder why not in tranformer feeder?no surge suppresor in ocb in motor feeder?

1 Answers   IOCL,

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Why two main buses and one transfer bus scheme not using for 400kV switchyard

5 Answers  

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dc supply given to dc generator winding.how is possible? my knowledge is saying the winding will burn. please reply.

1 Answers  

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what is droop?

13 Answers   Alstom, Bhel,

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Which one is correct mVA or MVA. Whether both the units are same for the transformer

10 Answers   Areva,

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A genarator is connected through a 20MVA ,13.8/138 KV stepdown transformer to a transmission line. at the reciving end of the line a load is supplied through a step down transformer of 10MVA,138/69 KV rating .A 0.72 PU load evaluated on load side transformer ratings as base values ,is supplied from the above system for system base values of 10 MVA and 69 KV in load circuit the value of the load in generator circuit will be ...........

1 Answers  

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What is meant by electrical speed?

1 Answers  

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how can tell us the AC indoor or outdoor which Tr and formulls

1 Answers   Mukand,

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