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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wap to print prime number from 1 to 100 using c++

1 Answers  

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Is there chopping current in resistive circuit

0 Answers  

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If the supply voltage is same (say 440V) whether a system designed for 60 Hz frequency will work with 50 Hz frequency or not , if so pl. give clarification.

11 Answers   ABB,

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Tell me harmfull effects of over voltage,under voltage,spike,surge,transient & noise.

1 Answers  

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How to perform a DC resistance test In Alternator and their proceduces?

0 Answers  

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How to convert 2 phase to 3 phase electricpower in induction moter?

0 Answers   HCL,

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List of equipments required foe industrial repair lab.

0 Answers  

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what would the resistance of a 110v 150w submersiblepump motor windings be

1 Answers  

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Define Current Transformer? Working & TYpe's Of C.T.

4 Answers  

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Simple explanation of kirchoff's law

2 Answers  

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shall we use a machine having 60Hz frequency in india ? why?

4 Answers  

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