Answer / sunny

u can run S.M. at any power factor u want by changing the excitation.

Answer / harshal nemade

synchronous moter run at all power factor as unity leading and lagging by chnging the excitation as
under excitation it is operates as lagging
over excitation it is operates as leading
at normal excitation it is operates as lag but reached to unity
at critical excitation it is operates as unity pf

I have 3 1000 kva single phase transformers and I wish to replace them with one three phase transformer. What is he kva rating of the new three phase, is it 1000 kva also or 3000 kva.

5 Answers   Central Moloney,

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i am trying to PSUs/govermeant jobs since last 2 years but still i m not success, plz help me.

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In a Dyn11 transformer, how are the 3 windings of the delta connected? Assume that R1-R2, Y1-Y2, B1-B2 are the 3 windings on the HV side.

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Which type of air compressor is used now a days in the market. Keeping in mind of energy efficiency and maintenance points. Relevant documents may also be sent on mentioned email ids.

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does frequency affects the load? if yes elaborate it.

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Can we transmit digital signal to long distance ?

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Difference between divercity and power factor

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What is vcb?

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why the rating of a transformer in kva not in kw.

9 Answers  

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