Answer / sidu_aee_kptcl

In Nov-09.

How the main bus bar rating of 400kV switchyard with one and half breaker scheme is calculated.

2 Answers  

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What is meaning of Float Charging of Batteries???

2 Answers   Emerson,

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why we use to transmit the power in three phases intead of single phase ?

5 Answers  

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how to select a capacitor, i mean we use 3.5 mico ferad cap for a celling fan,but how to select a cap for 1h.p motor,etc.........

1 Answers  

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why do we prefer alternating current in india where as in USA prefers DC?

3 Answers   Bhel, GMR, Texmo,

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why in isolation transformer we dont get any shok?

2 Answers  

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how the aircraft outer body and inner body is separated ?

0 Answers  

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How to calculate the size of window A.C. for 200 Sq. ft room?

4 Answers   UltraTech, Voltas,

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what is the need of capacitor in transmission lines?and how it works.

2 Answers   SCCL,

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what is a core company? why should we join a core company?

1 Answers  

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if we have 380 KVA DG. how to calculate Power Factor. With detailed formula

1 Answers  

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Sir we have 12.5 MVA(110/11KV) transformer (Y-Y) connected,which tripped showing earth fault,when we charged transformer it stood OK ,but on connecting 11 KV feeders it tripped showing earth fault.our service engineers found that the B phase and R phase phase connecting to neutral broken from HV OLTC(on load tap changer),and R phase and Neutral is ok.Dissolved gas analysis shows that accetline content is high,tan delta value is 12.My dout is it is an internal fault of transformer,why REF or diffrential relay is not acted?

1 Answers  

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