Used in air conditioning units, elevator machine room, pumps, fans and other motor control applications, as protection  of  over-voltage,  under  voltage, phase failure, phase sequence and phase unbalance. When the power  supply is abnormal, turn off power supply to protect the equipment.

    No power circuit design, konb setting, LED indicator shows working status.Main circuit and control circuit isolation and safer. Overload, phase failureprotection, simple and convenient wiring.