The SDM72 Series is a low cost three-phase multifunction 100A direct fed DIN rail mounted electricity meter. It can measure and display the characteristic of 3p4w supplies, monitoring power(Watts), active(kWh)and reactive energy (Kvarh) imported or exported (Bi-directional). Energy is measured and displayed as Active (kWh) or Re-Active (kVarh). The SDM72 Series requires Mains Voltage inputs (live in and live out, neutral in and neutral out) in order to operate, it is self-supplied so does not require an external auxiliary supply. We have a range of options from a pulsed output version for cost savings and Modbus RTU combined with a pulsed output.