DTSF3333 single phase multi-rate energy meter is designed for measuring single phase active energy.

1. PRODUCTS INTRODUCTION:  DSSF3333/DTSF3333 watt-hour meter was smart digital multi-rate and was developed totally by our company,This products adopt ultra-low power large scale integrated circuit and very advanced SMT production technology,makes it have high Measurement precision , stable capability , high quality,excellent EMC performance. This meter have functions of : positive and negative active energy counting, four rate timeshare energy consumption recording, event during working recording(event such as Voltage , Current , power factor , load , demand , programming etc.) and Infrared communication and RS485 communication. The data of this watt-hour meter is easy to read by infrared of Hand hold device. Its performance meets all the demand of GB/T17215-2002 1 & 2 class static A.c watt-hour meter , GB/T17883-1999 0.2 & 0.5s static  A.C active watt-hour meter , national standard and DL/T614-1997 Multi-rate watt-hour meter . The communication meet the demand of DL/T645-1997 Communication protocol of multi-rate watt-hour meter.1.1 Working PrincipleThis watt-hour meter was made by measurement unit and data unit,except function of measuring the active and reactive energy,and its function of timeshare and demand of measurement etc,and it can display,store and output the data. Working Principle show as figure No.1. Made up by Measurement unit,Data processing unit (CPU),LCD,Infrared interface,RS485 interface. When working,The analog signals (current,voltage) turns to digital signal after processing by the measurement chip,then be stored after the CPU processing. We can use the handle receive device or host computer combined with software to read data or establishment parameter,and can use the infrared remoter to read every display item according to the display list.

2 Parameter as following: Rated voltage: 240V Rate current: 10A Max current:120A Rated frequency:50HZ Pulse constant:200Imp/Kwh Precision class : 1.0SElectric energy measurement accuracy: Should be controlled within 40% of the limit error of international standard.1.Clock accuracy:Clock day error of watt-hour meter is less than 0.35 second (-10 to +50) Under the working temperature condition (-10 to +50),accumulated error of 18 days will less than 7 seconds.2.Limit working condition:Voltage: Working normally at 0.6Un--1.3Un,Will not be damaged within continuous 4 hours at 2.0Un,and keep accury of measurement after recovering to work normally. Current: Continuous operating for long times at 2.0Imax and half a period working at 30Imax the meter will not damage.Temperature: -20~+70Humidity: ≤100%  3.Power Consumption:Voltage circuit: 1W/Phase Current circuit: 1VA/Phase Lithium battery: replaceable structure,use life ≥15 years,working life≥ 6 years.1) Working current of watt-hour meter less than 30MA.2) Power Failure working current of watt-hour meter less than 20µA. Start current: 0.4% of rated current (Ib) Creeping: Meet the standard of GB/T17215-1998 Insulation: Meet the standard of GB/T17215-1998 Electromagnetic compatibility: Meet the standard of GB/T17215-1998 Figure explanation and installation giddiness:

DTSF/DSSF3333 three phase multi-tariff meter