fuses rated by amperes but not power,why?

3 Answers   Blue Star,

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why we can choose induction machine in wind mill? why can`t use synchronous machine?

3 Answers  

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if field current decreases how can the speed increase in the unloaded dc series motor

1 Answers  

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We have one 500KVA transformer. We have tested REF relay and commissioned. After one and half year, due to some ground fault in one of the DB circuit Transformer tripped by REF relay. What will be cause and remedy. Please advise?

1 Answers  

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Buchholz relay is used ………. a) protection T/F b) oil T/F c) Air core T/F

8 Answers   Engineers India Limited,

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How we select the vector group of 3phase power transformer?

0 Answers   wbsedcl,

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Seamless tubes are made by?

5 Answers   Bhel,

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is there any phase difference occurs while primary and secondary side mutual induction occurs?

0 Answers  

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why the excitation is necessary to produce the reactive power

2 Answers  

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how many amps in 1 KVA? V=440v, PF=0.8 and FREQ=50Hz

22 Answers  

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what is the difference between scaler and vector control in drive and where it is to be used ?

1 Answers   Essar, TCS,

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what happend to DC shunt motor if its field winding insulation becomes slightly weak? will that motor can run on full load or not explain in detail. thanks

0 Answers   PCL,

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