Answer / makku

Because of the construction of the transformer core/winding assembly, there can be high potentials induced into the core, causing partial discharges which will damage the transformer. The core ground diverts this voltage safely to ground. The core ground also provides a low-resistance path to ground if there is a short circuit between the winding and the core, allowing protective relaying to detect it. The core ground may be brought out to a separate, external bushing or it may be connected internally, with cost being the driving factor as to its location. As it is with most investments, you get what you pay for.

Answer / mohd fazil

for the core to acquire charges to get into a potential which may cause insulation failure between the leads of the transformer to the core so the core is earthed in ...

Answer / kayode

In order to complete a circuit of flowing curent, cause curent is directly propotinal to power and inversely propotional to voltage

what is potentiometer & rheostat

3 Answers  

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What is the reason of using bus-bars on the secondary on the LT transformers?

2 Answers  

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why link is provided in neutral of an ac circuit and fuse in phase of ac circuit?

4 Answers  

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Brushes are placed at magnetically neutral axis,when brushes reach that point,the armature conductor gets shorted,but it can be seen that the dc supply is also shorted,wont that get damage? help me plz

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why the desirable efficiency for a motor is 60%, but in case of transformer, it is above 90%?

1 Answers  

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My switchgear busbar is rated at 2000A and just imagine the actual load on busbar is 1000A. From that busbar there are 10 outgoing feeders. Now the question is will the load be 1000A on each outgoing feeder or 100A per outgoing feeder. 2nd thing how do i calculate the load on individual feeder. Thanks for your time. Please provide some clarification on this issue.

1 Answers   Alstom,

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how calculate busbar size for rated amps, which formula use

2 Answers   Rites,

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what is real and reactive power?

2 Answers  

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explain how hunting can be reduced in an alternators?

3 Answers  

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what is Distance protection & how did it work

2 Answers  

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which electrical supply used for long distance traction 1.1-ph 22kv a.c 50hz 2.2-ph 22kv a.c 50 hz 3.dc vtg 4.1-ph 22kv 150 jhz

3 Answers   Power Grid,

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how much test voltage should applied for tan delta test.

2 Answers   Electrical, TATA,

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