Product Description Major technical data: Accuracy class: 1.0 Power consumption: 20 years. Main functions: 1) Measurement of 50hz for 3-phase active power 2) 4 tariffs and 8 time periods for user's option 3) RS 485 communication functions 4) Manual and remote control program, and remote-metering functions 5) To record the parameters automatically through CMRI. Features: 1) High accuracy, reliability, overload capability 2) Low power consumption 3) Smt technology and re-flow soldering technology 4) Light weight, small size, easy to install. Model: DTSF318/DSSF318 Standard: IEC 62052-11 IEC 62053-21 IEC 62056-21 Productivity: 100.000pcs/year.