Answer / parimala

to calculate the P=root 3*line voltage *line current. By
substituting the values we can calculate fullload current
to know the no load current we have to know the RPM
usutken 40 % of full load currrent is taken on noload

Answer / partha

Simply take the formula of

KW = 1.732 * V * I * cos phi

ie

30 = 1.732*415*I*.8
[as voltage is 415v & in our country standard p.f 0.8]

I = 52.166 Amps

Answer / zahid

formula for no load current of 3phase electric motor

P= 1.732VI

I= P/1.732V, ur required result can be achived by putting
value in this formula

When star connection of motor is use?

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