Wye-delta is a reduced-inrush starting method in which 3 phase motor stator coils are initially connected in a wye configuration and switched to delta as the motor's speed increases. The resistor works as a reduced voltage starting resistor by starting a motor at 58% reduced voltage.
Initial information needed for sizing your resistor:
For other applications, such as small horsepower motors, dynamic braking, and field discharge, please give us a call. We offer free engineering assistance to our customers for all motor control applications