UPS battery Back time = no.of Batteries * Ah of the Battery / output KVA * 130 ? what is the 130 means ? can any one help? because all are using this formula how its came 130?

2 Answers  

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Which type of control system is expensive — closed loop or open loop?

1 Answers   GE,

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can we do the star delta connection of capacitor for 3- phase motor starter.

0 Answers  

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What should be the protection scheme for a 15kw, 3-phase motor working in a lathe machine.

0 Answers  

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What is the difference between Earth Fault protection & Neutral Protection

1 Answers  

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Is the inductance parameter of transmission line affected by taking the earth into consideration?is the same true for capacitance? Justify the answer.

1 Answers  

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Neutral to earth and phase to earth voltage how much.

2 Answers  

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Name of the relay of low lub oil presuure in DG sets

0 Answers   Lineage, Sterling,

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How relay works, reverse relay, master relay, os relay, earth fault relay and what is its setting point

0 Answers   cpgn,

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What is difinition of HIGH RESISTANCE FAULT and LOW RESISTANCE FAULT?

3 Answers  

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How many types of losses occur in a transformer?

0 Answers  

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What is phase angle? and what is importance to measure it?

2 Answers  

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