DS(T)SI39 three-phase PLC electric energy meter is a new intelligent watt-hour meter, which is developed and manufactured by adopting the current international advanced microprocessor as the core, combined with the functions of carrier communication and relay control; as well as adopting ADE7752 chip for power measurement. The meter accords with IEC61036. It has the characteristics of high integration level, stable and reliable, high accuracy, low power consumption, LCD display, abundant communication interface and convenience for installation, etc.