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.

      Built-in microcontroller, installed in a cabinet or 1/4 drawer unit. Currentmeasurement accuracy ≤ 2%, button setting, LCD backlit display current, faultstatus. 5 optional adjustable overload characteristic. With 1-set changeover and1-set auxiliary NO contacts. Enable star-delta and  auto  buck starts.Optional 4mA~ 20mA analog output and RS485 communication interface,support Modbus protocol, available network communication.