Answer / k.prakashchandra

The potential coil has to build up back emf to counter the
applied voltage whrere current coil need not

If 11 KV breaker on the primary side of a 11 KV/3.3 KV 12.5 MVA transformer can be installed at a distance of 1000 mtrs through a 11 KV cable. If no what are the probable reasons.

1 Answers  

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n1 =1000 n2 =?;v1 =200:v2 =400

1 Answers   APGenco,

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Three set (each phase contain 2 cable of 400 mmsq CU XLPE AWA) of single core cables are connected to 11 KV motor of 14 MW & the switch gear supplay is taken from 11kv feeder & this supplay taken from 275 KV substation. Problem is one pair cable(L3- 2 cable ) getting very hot & gland melted and damaged in switch gear side. the other two cable haven't any more hot(ambient temp only & L3 haveing 95- 100 Degree C. The same problem happened in 275 KV substation switch gear side also where the supply taken for 11 kv switch gear. But here L2 phese cable had problem. Why it is happening like this?. The cable having temperature different at different location from gland side inthe case of 11KV feeder of 275 kv substation. why ?

2 Answers  

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In power generator sets, when they are coverted from 50hz to 60hz, the kva rating after conversion increases. For example, the manufacturer of a perkins 200kva @ 50Hz generator set has mentioned it to become 220kva after converstion to 60hz. What is the relation between the frequency & the KVA rating. Any formula please.

3 Answers  

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Can we use 230VAC, 63A MCB for 120VAC, 63A supplied heaters load?

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what will happen if 11KV is given to 1.5 square mm cable connected with constant load of 10A ?what will be the condition of cable after injecting the voltage?

1 Answers  

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they transformer oil leakeage to beather tank and top parts . they protection relayes was not operated.what is the oil leakeage problem.

1 Answers  

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i am working in automation feild my question is that how to find the KVA of transformer.

3 Answers  

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Thermal withstand capability under full short circuit conditions, in terms of number of times of occurrence of short circuit and corresponding anticipated percentage reduction in transformer life.

0 Answers  

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What is resonant peak?

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State the other types of Air Conditioners?

0 Answers   HSL,

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Why phase sequence ryb called colours.

1 Answers   MS Life, NTPC,

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