... and displays real time AC phase voltage, line voltage, and current with LED display in 3P3W or 3P4W network. It is ... , 4 bits display + one relay contact output,YD912A:3 phase current, voltage input, 4 bits display +one RS485 + one passive contact ... sliding-way, wiring behind Case Material: flame retardant plastic Isolation: Power supply/input/output 3-Phase AC Voltage/Current Combined Panel Meter