Answer Posted / santosh kawade

3 phase motor is a balance load, hence we are not require
to connect star point of star connected motor to ground.

Due to balance load there will not be any current flow from
neutral and connecting star point create unnecessary
wastage of material and money.

santosh kawade

A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.

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2135

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2580

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