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How to calculate battery back up time for a 400 AH battery bank installed in telecom shelter for a load of 20 Amps and time taken to fully charge this battery bank?

3 Answers  

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pls tell me about ups internal connection & we have given only 3 phase supply to ups system how get 4 wire (R Y B N )

0 Answers   Bhel, IBM,

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How to identify the whether its an isolator or Breaker in MDB

5 Answers  

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what's the difference between 'shaft power demand' and 'BHP' , when we consider electrical load list.

0 Answers   HEC,

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In Energy meter How many rotation Equal to one unit.

3 Answers  

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why a single phase induction motor has poor power factor

0 Answers  

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what is difference between vaccum circuit breaker and air circuit breaker?

2 Answers  

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what is the difference between vector scale and vector diagram?

1 Answers  

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please write motor, transformer, Generator setting, fault level calculation of Tr.etc

0 Answers  

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why we do occ & scc test in transformer ?how we can do it ?

2 Answers  

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what are the type of transformer?

4 Answers  

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What is the minimum percentage of power that a powerplant can support in ilanding mode ?

1 Answers  

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