Answer Posted / sapna

i m in need of jspl test paper i m from electronics n
communication branch.
plz send me the paper
i hv urgent need of it.

Can RCD's used to protect the VVVF drive if not why.

2127

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How Load Factor, Demand Factor, Diversity Factor etc best applied in designing an electrical circuit? Is it allowed to consider these factors in each and every panel in an electrical distribution system? Can any body suggest a good book for reference?

2873

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i have faced a problem in ro plant grunfos make bm30type pump it is 22kw pump. We start this pump using siemens 3rw 4423-ibc44, 30kw softstarter but this soft starter will frequently failier so we planed to change dol starter. So pls tell anybudy its possible or not.

1912

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what is the setting of locked rotor in HT motor ? (answer expecting in percentage)

2263

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what is feed back and what are feed back amplifiers?

1052

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How u can give the overload setting to any motor protection relay for a HT motors with formula and Example?

2177

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explain which quantities change in the starting and the and the running condition in induction motor

1419

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Dear sir, my knowledge about cable size determination is limited. Though I read examples I could not calculate the Cable size required for electric driven pump 40 KW, 380 Volt, 50 HZ, 50 meter from transformer and it is three phase star delta starting. Please help as there is no one in my surroundings to help.

1728

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can i use ups power as a raw power for another ups

1960

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How Calculet The UPS AH In Load

1880

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what is class of SPD and dittels of all class ?

2113

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why using transformer and thyristor switch in 3 phase apfc panel

2858

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what is diff. between earthing grid,earthing mess, earting grid?

2382

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what is the difference between Power and Distribution transformers ?

2135

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what is a vector protection in transformer

2000

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