How can we calculate ac current from the given DC current when AC voltage is given?

0 Answers  

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What is battery Amphere-hour? How the battery back up time period is calculated?

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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A single line diagram(SLD) and a purchase order of a 11/66kV switchyard of a power plant was given. In the SLD, only one lightning arrestor(LA) was shown, but the purchase order had need of 3 LAs. Is this correct, if yes, why?

2 Answers  

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definition of fault level in powersystems?

4 Answers  

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what is meant by transformer oil temparature

3 Answers   Vijaya Bank,

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how the capacitance is caluclated if the load is varying to keep the power factor constant(above0.95)

1 Answers  

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What are the functions of different probes used in cro?

0 Answers  

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What is fault level?How it is calculated and how it is Expressed?

2 Answers  

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why lightning arrester and other equipment earthing conneting from same earth bar ?

1 Answers  

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What is the operational principle of direct current current transformer and direct current potential transformer?if possible plz reply with ckt. diagram.

1 Answers  

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What are the safeties in elevators?what is the use of governor in elevator?

3 Answers   JLL,

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