Fire Pump Controller MPT435TS Pilot Series - Wye Delta Closed with Automatic Transfer Switch

MPT435TS with Transfer Switch Pilot Series Wye-Delta Closed Transition controllers require six leads from the motor to the controller. These leads are connected by the controller first in the Wye configuration which draws 33% of normal starting current and develops 33% of normal starting torque. After a short time delay, the controller then connects the motor winding in a Delta configuration, applying full voltage, drawing full load running current and developing full running torque.