single-phase electricity meters

DDSF846 static single-phase multi-rate electricity meters (led) display Functions and features 1.The meter is equipped with measurements of positive and negative electric can be measured on the basis of accumulated positive electric energy. It can record the total time when current goes inversely and electricity consumption including the starting time for last inverse current. 2. The meter can automatically store the data frozen 12 months earlier, and the time of data storing can be set any date from the 1 st to 28 th. 3.Equipped with high-accuracy clock chip, the meter is also provided with a century calendar ranging form 2000 to 2099, and an accurate automatics switching function between the time and leap year. 4.Three tariffs: consumption for sharp peak load hours, day hours and low load hours as well as twelve tariff times can be set by programming. 5.Parameters setting, enquiry and reading of working data and electricity consumption can be performed with the aid of infrared communication done by hand-held terminal or RS 485 communication. 6.LED display, automatic wheel display mode is applied. 7.Safe In Programming (1) Built-in hardware programming switch. (2) Hand programming-making for setting code. (3) Respective hand programming and data-recording. 8. Equipped with programmable clock pulse output. Specifications and parameters: 1. Rated voltage: 220v 2.Basic current: 1.5(6)A, 5(20)A,10(40)A,20(80)A 3.Accuracy class: 1.0, 2.0 4.Power loss:≤2W 5.Rated frequency: 50Hz 6.Infrared telecommunication distance:≥5m 7. storing time for power-off data≥10 years