Class 3000 advanced meters provide customers with a low-cost, intelligent kWh/Demand meter displaying kWh, kW with peak date and time, real-time kW, amps per phase and volts per phase. E-Mon meters with patented 0-2 volt output split-core current sensors allow for quick and safe installation without power interruption. These sensors also allow for meters to be remotely located up to 500 feet from the electrical panel they are monitoring. RS-485 communications capability supports up to 52 Class 3000 meters. Use on 3 phase, 3 wire (delta) and 3 phase, 4 wire (wye) circuits. Comes with three split-core sensors.