CURRENT TRANSFORMER AND PHASE UNBALANCEDETECTORThe system has a current transformer and a phase unbalance detectorwhich protect the electric circuit from the electric pump. When there isa fault, the detector gets a signal from the current transformer. It uses thissignal to stop the supply of power to relay and thus stop the motor. Whenthe unit has operated, it stays in that condition until it is set again. Thishappens automatically when the supply of power to the unit is stopped(through operation of P/BSW HYD/BLUE/ELEC PUMP) and then startedagain (and there is no fault signal from the current transformer).