Eaton FD70 Wye Delta (Star-Delta) Open - EPCT Fire
The FD70, type EPCT Fire Controller uses a method of connecting the pump motor windings into wye configuration to start, then switching to a delta configuration to run. This reduces the starting current of the motor significantly. Wye-Delta starting is the only method that has a starting torque efficiency of 100%. The FD70 can be programmed for either fully automatic or semi-automatic operation.