Answer / prashant patil

due to the residual magnetism.

how we calculate the 30 KW 3phase electric motor current on noload

23 Answers   Monnet, Siemens, SSR, Supermac Industries,

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Dear sir/mam Iwant complete details of Naintenence of 33kv/433v Transformer having 1250 KVa

1 Answers  

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what is power factor

7 Answers   Eskom,

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Why VCB is required and ACB is also require? what is the BDV of Trafo of 11/33 KV

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what is "pu" in electrical engg.

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1600kva capacity Transformers how the bucholz relay,Oil temperature,winding,surge relay relays setting are to be done

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what is the function of an auto reclosure relay in OHL?

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Shall I use 40A semiconductor Fuses in 32 A SFU ? Frame size is same. What Happen if Fuses burn on SFU?

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Transformer cores are laminated in order to A simplify its construction B minimize eddy current loss C reduce cost D reduce hysterisis loss

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Whether IP65 enclosure box blocks ventilation if driver for LED have to enclosed inside IP65 box

0 Answers   Siemens,

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I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.

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is it possible to run the any motor when winding grounded? how?

1 Answers  

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