If the winding is such that the series delta gives the low speed and the parallel wye gives the high speed, the torque will be the same for both speeds.

Question

Quizplus · Accepted Answer

The torque produced by a motor is directly proportional to the current flowing through the motor windings. In a series delta connection, the current is the same in both the high-speed and low-speed windings. In a parallel wye connection, the current is divided between the two windings. However, the total current flowing through the motor is the same in both cases. Therefore, the torque produced by the motor will be the same for both speeds.

If the Winding Is Such That the Series Delta Gives