how many earthing required for ups, what should be the earth voltages

9 Answers   Juniper Networks,

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What is the technical formula to calculate the load taken by a motor in Amperes ?

2 Answers  

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Single line diagrams for star to delta and DOL starters.

0 Answers  

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What is the difference between MCB & MCCB, Where it can be used,

22 Answers   ACB Group, Badve, Bajaj Electricals, Hensel, Siemens, SR,

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what is the mechanism of operation of brushless dc motor why is it more wexpensive then ordinary permanent magnet motors

0 Answers   Lanco,

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send me any model test paper of clerical post of state bank of india.......

0 Answers  

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The error in a single phase energy meter where pressure coil lags behind applied voltage by 88 degrees and pf is 1) upf 2).5lag

1 Answers   GATE,

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1.where in India the maximum transmission voltage is operated? 2.what the methods are used to cool down the transformer?give the specific ratings of the transformer & specific cooling process. 3.how zero & negative sequence reactances are formed in a rotating machine when fault occur in the system?

2 Answers   IES,

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What is the diffrence between ofline ups and online ups?

3 Answers   Intel,

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why the NGR (neutral grounding resistor) always OFF during DG off?

0 Answers   Bhel,

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In Railway,why we are used HT Line 25KV ?.why we are not used 11KV,33KV and others for This?

37 Answers   Airtel, BSNL, RRB,

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What is systematic error?

0 Answers  

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