Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient?

1 Answers  

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WHY EARTHING NOT NEEDED IN BATTERY IN SUBSTATION

0 Answers  

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what is demagnetising effect & crossmagnetising effect and how it is related to electrical system?is there any more effects are available or only these two??

1 Answers   Telco,

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(1) From the following option, which option is correct for largest size transformer.? a)1KVA,25Hz , b)1KVA,50HZ , c)1KVA,60Hz , d)1KVA,100Hz

5 Answers   Torrent Power,

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what are the differences between 'exhaust fan', 'heavy-duty exhaust fan' & 'super heavy duty exhaust fan'. what are their power ratings ?

0 Answers   CG,

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how to calculate EXCITATION VOLTAGE & CURRENT in ALTERNATOR

0 Answers  

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In what way does the variable ratio-arm improve the usefulness of the wheatstone bridge?

1 Answers  

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what is the function of generator exciter

11 Answers   NTPC,

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how to changeover ups in this power failur time?

0 Answers   Essar,

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what is the difference between Current transformer & Capacitive voltage transformer

2 Answers   ABB,

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what effect on electrical equipment if PF is gone over 0.996 in leading when provider say that its keep in minimum 0.996lagging

3 Answers   ABB,

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Do we really need wheels for the transformer

1 Answers  

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