why we not connect the 12 V batteries in parallel to get the more backup supply for an UPS ? wheter off line or on line UPS ?

2 Answers  

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What is distance protection relay? where & why we use this relay?

2 Answers   Siemens, UltraTech, Voltech,

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why 1.7Uo for HV cable Hi pot test?IE standard why?

0 Answers   ABB,

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Why neutral point is consider as zero potential?

0 Answers   Equate,

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What is meant by Guard relay ?

2 Answers  

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what is the full form of XLPE adn there use.

4 Answers   Voltas,

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can a rotating machine give the DC output without commutator? if yes, how? if no, why?

6 Answers   BARC,

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How can I calculate per unit (KWH) fuel (Gas/ Diesel both) consumption 1MW unit?

0 Answers  

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Why the wave trap is put in Y phse only in switchyard?why not in other phases?

1 Answers   IAG Automation, REL,

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what will hapen if we give ac supply to dc motor?

2 Answers  

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why the transformer primary terminal indicated by u,v,w.to technical reason

2 Answers   JNTUK,

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what is real power and reactive power?

3 Answers  

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