What is the main difference b/t Earth leakage relay & Earth fault relay.I want protect my LT panel(Distribution Panels)which relay have to propose.......

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i installed 100kva ups. what KVA genset they should provid in input side? plz any update formula or ans with reason.

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On which side, taps are provided in tap changing transformers and why?

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which is best ac or dc

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if 11 lead acid batteries each 200 amph are connected in series so that combinly they can produce 110 volts dc. question is how much backup it can provide ? 2) how can we calculate that how much amprere and voltage is required to charge them . thanks in advance !

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what is the working principle of a DG Set, Alternator, & exiter

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why stator winding of synchronous machine are connected in star connection ?

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how we can come to know that motor winding resistance which showing by DMM is right or wrong???is there any chart or something that we will compare & check???

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what is voltage, and how it makes the electron to move?

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why we r not earthed Control cable of C.T. terminals

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

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How one can check the charger of the mobile phone or any other charger .......... that is it working ? if , working is it delivering the required supply which is needed by the battery to charge properly ?

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