Answer Posted / shailesh singh

Battey backup(va)=mah×v×n of battery/watt

I am having dual speed motor of cromton greaves make of 3.7 KW -1400 rpm and 5 KW - 900 rpm. Please let me know groups and winding connction for rewinding purpose.

1915

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Whether amorphous core transformer is commercialized or not:Name of company making amorphous core transformer and what are different rating?

1798

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What is Phase margin?

1102

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defult setting in p220 micom motor proction relay for 11kv,640kw,f.l.a.-40a,1440rpm ht motor?

3697

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Explain few advantages of electric traction system?

1124

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wat system call?

1961

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why not starting switch first connect in direct on line starter?????

1931

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is there any chart showing the suitable cable size according to AMP and length ? for three phase motors

1394

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what is vA rating and class of a ct.

1854

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Dear sir, By which formula u can calculate for a particular kv line there is a range of mw.

2125

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if an insulated power and control cables of a running gas diesel gensets laid direct in an open trench i.e, trench bed is not rcc of a power house in which rain water, spillage water alwas exists and all power control cables remains submerged even when gas gensets of 480 kw each runningin on load. These power &control cables runs from power house to switchgear room through these trenches in which water remains most of the time. pl explain its merit & de-merit

1869

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before transformer oil dielectric strenght tests are taken the oil should be allowed to settle to remove option 1 air bubbles 2 gasses 3 contamination 4 water

1656

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how to calculate the cable current ratingand and how much of distance the rating will be ok will the distance is incresed what the action we take

2124

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Why field rheostat is kept in minimum position?

1234

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why would amp draw on neutral wire be as much as amp draw on the hot leg.

2087

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