If one 10 Hp 3phase induction motor connected in 380volt
50Hz. and again its connected to 380volt 60Hz. howmuch
currrent and power take on both time?????



If one 10 Hp 3phase induction motor connected in 380volt 50Hz. and again its connected to 380volt ..

Answer / badshah

1.2 times that of 50 Hz Power. Frequency increases the
Speed & which in turn increases the power consumption
[P=(2*pi*N*T)/60 and N = 120f/Poles)]..so the ratio is
60/50. But the losses will be more, cause iron & hystersis
losses proportional to frequency squared. I think overall
efficiency may be reduced than when the motor is connected
50 Hz supply.

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