what is transient earth voltage

2 Answers  

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my UPS is 600VA with 0.6 p.f and i use it for my computer which has 450W power supply unit, a monitor of 633nW and speakers. Can any one explain this.. because the output of UPS should be 360W (<450W)

2 Answers  

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Dear Sirs, I am a technical persons.In one of our Electrical Sub- Station, We have installed three numbers of 1250KVA ,11KV/0.415KV Transformer to feed the Factory load. We have found some abnormality. In one of our Transformers the leakeage current from transformer body to earth through earth continuity wire is almost 86 Amp but in other transformer it is (5-10)Amp. where the load current on three phase and neutral are respectively 1360Amp,1400Amp,1370 Amp & 176Amp. So please any technical person help me about the reasons of this situation and how I can rectify the fault. Moreover,I have measured the earth resistance of the Earth continuity wire which is less than 1 Ohm. Thanks Tapas Barua

3 Answers  

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why the perameters of secondary circuit are more important then that of the primary circuit of induction motor?

0 Answers  

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Why we use DC for charging of Batteries??Why not AC Supply???

6 Answers   Emerson, Infosys,

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1.where in India the maximum transmission voltage is operated? 2.what the methods are used to cool down the transformer?give the specific ratings of the transformer & specific cooling process. 3.how zero & negative sequence reactances are formed in a rotating machine when fault occur in the system?

2 Answers   IES,

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How we calculate the current carrying capacity of H.T. cabel?

0 Answers   Bhel,

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explain different types of d.c motors?

0 Answers  

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what's the simultenous maximum demand (SMD)..what the diffrent MD and SMD?

0 Answers   HAL,

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how to measure earth resistance of a substation

0 Answers  

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where we take earth in hill station

1 Answers  

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Why we didn’t feel electric shock in an electric train ??

10 Answers   NTPC,

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