i have ht transformer of 142 kva with air cooled facility,having secondary voltage 7850volt, and secondary connected full way bridge rectifier .i faced the problem repeatedly that transformer one coil and rectifier diode of two phase was burnt two times. i checked all the secondary ckt. no any short ckt found,then what will be the cause side

2 Answers   Modern Terry Towels,

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what is skin effect? why is it absentin dc system

22 Answers  

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Wat is da difference b/w neutral earthing and unearthed system?

2 Answers  

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CAn any one can tell me what is the operation of ceiling fan and how it will start

2 Answers  

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define frequency ?

14 Answers   KPTCL,

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Dear all i am kumaravel. now in chennai. my work is control and relay panel auto cad designing.up to 11kv to 400kv then question is i am improving my knowledge. i want some books name and auther are available for this C&R panel related. plese any one help me

0 Answers  

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What is principal to reduce earth leakage current with isolation transformer? When isolation transformer is installed in input stage of system, earth leakage current is reduced. the reason is why the leakage current of 2nd stage of isolation transformer does not affect the 1st stage's leakage current. I would like to know the reason. As you know, earth leakage current is a kind of AC. So, How to reduce earth leakage current in case that isolation transformer is used?

2 Answers  

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What is EMC filter in VVVF Drive ?

0 Answers   Bengal Energy,

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400Kv,can it be generated?why?

2 Answers  

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200-100/1-1A – Transformer Knee point voltage

1 Answers   AAPT,

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An automatic water heater is an example of which type of control system?

0 Answers   GE,

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Is it possible to power factor more than unity?

9 Answers   BEL,

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