DDSF345 type single——phase electronic multi——rate watt——hour meter is used to measure AC active electric energy of rated voltage 220V and frequency 50Hz of single—phase power network，it is a kind of intelligent measuring meter that can measure by means of divided—period，count the cost by time—sharing and calculate automatically．Users can make a decision of power utilization according to the multirate in the different periods．The bi rth of multi—rate products enhances electricity using at peak time，it not only saves the electricity cost，but also balances the electric energy using．After being equipped with a palmtop computer(meter reading system)，it can make use offar infrared to program，during meter reading and timing，it can realize nontouch type data transmission and automatic control by connecting with micro—computer

◎显示及记录当月和上月峰、谷、平等多种费率的用电量和总用电量。
◎显示当前所处的费率时段。
◎累计总电量、El期、时间、电表常数、抄表日期及时段参数。
◎设置8个时段，可供电业部门任意对4种费率的选择。
◎表中设有内置储存器保存数据，停电数据信息确保10年。
◎具有多重加密方式，防窃电、抗干扰、耐攻击的功能。
◎适应电压范围宽：170V-260V ◎计量高、负载宽：IMAX=8Ib

◎Display and record multi—rate power consumption like peak．valley,even and total power consumption this month and last month.

◎Display present rate period ◎Preset total electric quantity，date，time，constant of watt—hour meter,date of meter reading and parameter of period ◎Set 8 time—interval．it can supply any optional multi—rate for power department .

◎Record E3ROM data that is reserved when power is off in meter,when power is off the data keeps in meter,we make sure the internal memory information can be used for 1 0 years .

◎Posses multi—mode of encryption，functions of electricity thieving—proof，anti—interference，anti—attaching.

◎Applicable voltage range：1 70V-260V ◎Height of measuring accuracy and width of l oad：lMAX=81b