why middle phase should used for earth fault and other phases used for over current in overcurrent and earth fault relay?

7 Answers   ABB, ONGC,

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why rotor resistance starter is not suitable for squrielcage induction motor?why it is suitable for slipring induction motor?

5 Answers  

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why we oltc on hv side of tranformer only

10 Answers  

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i alternator which of genarator used for excitor the what is reason?

3 Answers  

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over frequency is the protection of turbine or alternator?

2 Answers  

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how electronic energy meter works?

12 Answers  

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Why Lightning arrester used? Can we use piece of iron as a core material of transformer, if No, why? In CRGOSS material what is meaning of cold rolled grain oriented? Why Impegrenation of Transformer is done? Properties of Insulator? what is phase angle? Testing of transformers (Routine & Monthly)?

6 Answers   NTPC,

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why transformer has more efficiency compare to rotating machine?

3 Answers  

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why usa use 60hz and 110v?

2 Answers  

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How do i right a ladder diagram that has 1 actuator that performs a full stroke followed by a half stroke

0 Answers   Tata Motors,

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diff. between tension mode & speed mode

0 Answers   BSL,

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If 440 V supply has given at the secondary winding of transformer at that time if we apply 11 KV at primery then what will happen???????

4 Answers  

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