Why Diffrential and Ref relays are used together although Diffrential relay can protect Pri and Sec of Transformer

1 Answers   Qatar Gas,

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Please brief me about number of pole in alternator.In single phase alternator coils are connected in star or series. How to calculate frequency for the same.

0 Answers  

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Railway Basic electrical engg technical question with answer

1 Answers   Indian Railways,

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Is it possible Z axis excess error alarm reflect in X axis if yes explain ?

0 Answers  

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How to calculate earth flat size for 250 Kva DG and transformer?

8 Answers   Deepak Fertilisers,

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what are the things that can cause a three phase motor to crawl?

1 Answers  

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what are the electrical components required for run the motor pump including safety components plz explain it how we can use such components .

2 Answers  

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what is the voltages using in movie theaters??? why ??why not other??

0 Answers   Lanco,

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How feedback transformer works to feedback power in Slip Power Recovery System

2 Answers  

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Which machine u will prefer to use at where flameble gases are comming out & why?

1 Answers   NTPC,

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How i can calculate current of cable according to ares?

0 Answers   Pharma,

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electric shock is due to current r voltage.?

12 Answers   National Steel, TCS,

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