Answer Posted / mohamed mustafa

put one bus coupler CC circuit relay contact in series with
the other relay cc circuit, this is simple and achivable.

what is the use of commutator in dc motor if we supply ac ? commutator is used to convert ac to dc.and it is used to arrange the flux in unidirectional in case of dc supply. if we give ac as supply to dc motor what is the use of commutator?

2092

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i am going to give the JSEB,RANCHI exam for power plant,so i need some samples of papers related to that,so please send me these papers by my mail id.

3483

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Is there any rule to select the voltage of motor based on KW rating? What is the rating above which lt motor becomes the HT motor?.

1725

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what is mean by dual digital protection in the relay field?

1939

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what are the available sizes of pin type terminal lugs in the market today?

1842

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why occ characteristics of generator is also called as magnatization characteristics ?

2139

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what happens when series resonance occurs?

1853

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What is meant by harmonic distortion?

1120

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any one can explain the stages of a knee point which is taken during ct magnetising curve.

1790

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Give the expression for the frequency of oscillations in an op-amp sine wave oscillator?

1115

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hi,every one, i have to write the search paper on "performance policy optimization" of NGN (next generation networks). i need the material on this topic. can any body help me. please tell me any useful site where the good material is available and name of any reference book. it should be a great help for me.

1926

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how to identify conection leads of an unknown electric motor

2153

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what is the relative size of single and three phase?

1896

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What is the tipical Online UPS input voltage for 20 KVA load ( 3 Phase or 1 Phase )? Why ? Explain it...?

2653

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On 400 amp factory load how kvarh capacitors provide

1709

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