i want to know how to calculate the battery capacity based on the UPS . ex i want to run have one kva UPS Which should run 10 hours ? in that case how many batteries to be installed and what will be the AH Value .

2 Answers  

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Which type of DG need Netral Earthing?

1 Answers   Hyundai,

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i want prepare power grid exam what are book we want refer for electrical ?

5 Answers  

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Why dose an electric meter record KVA when there is no load on a 500 KVA transformer

1 Answers  

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What is difference between ball screw and lead screw.

2 Answers  

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7. A resistance of 30 ohm is connected across 240v supply. If a resistance R ohm is connected in parallel with 30ohm resistor across the same supply, the current drawn becomes triple of original one The unknown resistor R is

2 Answers  

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How to power regulated by AVR in Alternator?

3 Answers   EPGL,

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low frequency protection why recomend?

0 Answers  

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WHY THE FREQUENCY IS 50 HZ IN INDIA.CAN WE USE SOME OTHER FREQUENCY.IF SO WHAT IS THE RANGE AND WHAT WILL BE THE EFFECT IN PRESENT POWER SYSTEM IF WE CHANGE THE FREQUENCY AS YOU SUGGEST ?

32 Answers   L&T, MCL,

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HI....HOW CAN BE MESARED THE VALVE OF NEUTRAL GROUND RESISTOR WHIC IS LOCATED AT SWICHGEAR ON GENERATOR SIDE....

0 Answers   Jindal,

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what is maximum or Threshold value of current 7 voltage that a common man can withstand

1 Answers  

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what do u mean by starting torque? how it should be for a good motor? what is the relation between starting torque and power factor? What is the relation between efficiency and starting torque?

2 Answers  

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