How to calculate the ups battery back up? give the formula.

15 Answers   Cushman Wakefield, Ethio Telecom, Exide, MacLellan, Morgan Stanley, TATA,

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EXPLAIN THE WORKING OF SERIES REACTOR IN HT CAPACITOR BANKS (FOR VOLTAGES & CURRENTS)

1 Answers  

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what is the function of NAT & NAC contacts in breaker control switch (TNC)??

2 Answers  

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why restricted earth fault protection can not operate for phase faults??as there will be a current in secondary of ct,when a phase fault occurs!

1 Answers   GMR,

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At which time Synchronous generator act as a Synchronous Condenser?

4 Answers  

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What is a soft start?

4 Answers  

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we can conformed the vector group of the transformer. How?

0 Answers  

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Why we are using LA Rating 10kA in 66 kv substation

1 Answers   L&T, NMDC,

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tate and explain super position theorem

2 Answers  

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Is it true that IPT are more accurate than CVT for Measuring purpose?

2 Answers  

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wat is the importance of reactive power in power generation.....if it is zero means wat will happen to system........

22 Answers   Bhel, Jindal,

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Sir, I need a power supply at 380V. The supply I get in three phase is rated 415V. The total supply I have from the supply company is 70KW. Kindly inform if it is better to use a voltage stabiliser for this purpose or a transformer

3 Answers  

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