... JVRDphase sequence voltage protection device(Voltage and Phase Relay)Features:1,Phase Loss protection2,Phase sequence protection3,Under voltage protection4,Over voltage ... boxes, pumps, fuel pumps, central air conditioning units, electrical control boxes, distribution cabinets, cranes, etc., such as central air ... area of 1.0 ~ 2.5mm. If the single strand copper wire into the terminal directly; the use ...