DDSY870型 

电子式单相预付费系列电能表

Type DDSY870

Single phase electronic repayment kilowatt-hour meter

1. 概述

本系列产品适合于实行先付电费后用电制度的场合进行单相交流有功电能的计量，可实现电量预购、负荷限制等功能，解决了供电部门收费的问题。

产品性能符合GB/T17215-2002、GB/T18460.3-2001等标准，显示方式可选（LED或LCD），具有寿命长、准确度高、过载性能好，功耗低和体积小等优点。

1. Introduction

The series of products are applicable to the place where have rules of paying in advance and then consuming to measure single phase AC active electrical energy,it also has multiple functions,such as purchasing in advance, maximal load limiting, user’s information management.

Each of performation accords with GB/T17215-2002、GB/T18460.3-2001 standard, display mode can be selected (LED or LCD),it has many advantages,such as long ser­vice life、high accuracy、good overload、low consume and small volume.

1. 规格型号

2.Specifications and types

3.技术参数

3.1电气要求

3.1.1度等级：1.0级，2.0级

3.1.2正常工作电压：0.9Un~1.1Un参比电压

3.1.3极限工作电压：0.7Un~1.3Un参比电压

3.1.4绝缘电压：≥2000VAC

3.1.5功率消耗：≤2W

3.1.6视在功率：≤10VA

3.1.7起动：电能表在参比电压、参比频率及功率因数为1的条件下，当负载电不充为0.4%lb（1级表）、0.5%lb（2表）时电能表应该连续计量电能。

3.1.8潜动：当电压回路加115%参比电压，电流回路无电流时，电能表输出的脉冲不多于1WH。

3.1.9设计寿命：≥10年

3. Technical parameter

3.1 Electrical required.

3.1.1 Accuracy rating：class 1.0，class 2.0

3.1.2Normal working voltage：0.9Un~1.1Un reference voltage

3.1.3Limiting working voltage：0.7Un~1.3Un reference voltage

3.1.4Isolation voltage: ≥2000VAC

3.1.5 Power consumption: ≤2W

3.1.6Apparent power：≤10VA

3.1.7Start:Under the condition that reference voltage, rated frequency and power factor is 1, the meter will record energy continuously.

3.1.8Creeping:when put on 115% rated voltage in voltage circuit ,and there is no current in current circuit,the pulse outputs less than 1wh.

3.1.9Designed life: ≥10 years

3.2环境要求

3.2.1正常工作温度：－25℃-+60℃(三相)

3.2.2极限工作温度：－30℃-+70℃(三相)

3.2.3储运和运输温度：－45℃—+70℃

3.2.4相对湿度：年平均小于80%

3.2 Environment requirements

3.2.1Normal working temperature：－25℃-+60℃(three phase)

3.2.2Limiting working voltage：－40℃—+70℃

3.2.3Transportation and Storage temperature：－45℃—+70℃

3.2.4Relative humidity (RH)：annual mean should be less than 80%

4、基本功能

4.1双向计度功能，能够测量正、反两个方向的功率，且以一个方向累计电量，具有防窃电功能；

4.2采用光电隔离技术输出电能脉冲信号，发光二极管指示用电；

4.3先购电后用电，预购电量用完则断电；

4.4显示屏轮流显示使用电量和剩余电量；

4.5辨伪功能：当使用非指定介质时，电能表不会接受指令，拒绝操作；

4.6具有记忆功能，数据在断电后不丢失，上电即可恢复；

4.7具有警报功能：当预购电量小于设定电量时报警提醒用户即时购电；

可选功能：应急赊电功能、电价改写功能、销过户功能、监控用电负荷功能。

4.Main function

4.1 This meter have function of two direction measurement,it can accurately measure the power of  forward direction and reverse direction,besides,it accumulate quantity of electricity n one direction, and anti-theft.

4.2 Adopt photoelectric isolated technology,which output pulse signal, power supply will be can instructed by light emitting diode.

4.3 Paying in advance and then consuming,when the purchasing electricity has been used up, cut electricity off.

4.4 Can display used electricity and remaining power alternately.

4.5 Resolving ability:When using unspecified medium,the meter will not accept order, and refuse

to make its operation.

4.6 Memory function:when power failure,the data will not be lost,it can be recovered when there is electricity.

4.7 Alarm function:when electricity purchased in advance is less than preset electricity, it will alarm user to purchase electricity immediately

Optional functions: supplying electricity to meet an emergency(one time), correcting electricity prices function,loging out assigned function, monitoring electricity load function.

5外形、安装尺寸（单位：MM）

5.1产品外形尺寸：229.5mm*145mm*73.5mm.可也按客户提供的外壳进行模块设计；

5.2表计功能可根据客户需求进行技术设计和开发。

5. Outline, mounting dimensions（MM）

5.1Outline dimensions: 229.5mm*145mm*73.5mm, the box can also be designed by module

5.2 Measurement function can be designed by customers’ demand to develop