i am using star-delta connections with reverse/forward direction motion of the

i am using star-delta connections with reverse/forward
direction motion of the 75hp induction motor.What should be
the ratings of Main,Delta and Star contactors and why?

Question Posted / munavwar khan

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i am using star-delta connections with reverse/forward direction motion of the 75hp induction motor..

Answer / jakeer

well you are using 75 HP(55KW) motor.its flc is 96amps at 433 volts.

1.Main contactor:200amps rating.
2.Delta:200amps.
3.star; 125amps.

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