PLC function Electric Static Meter

PLC function Electric Static Meter 1 Introduction DDS28u single-phase multi-function PLC electronic watt-hour meter is designed for balancing electricity better as well as measuring household electric energy with time-sharing technology. It can measure active energy, communicate via remote infrared or PLC, freeze energy automatically in auto-read-day monthly and in auto-read-time daily, and so on. Measuring the active energy accurately, the meter can be used as the terminal of the AMR system. It can communicate with concentrator, which is installed in the distribution substation, via PLC. It can send the data, for example energy information, to concentrator in semi-duplex mode. So it is an ideal option for measuring resident electric energy consumption, AMR system and measuring with time-sharing technology. DDS28u complies with the standard IEC61036 Alternating current static watt-hour meters for active energy (class1 and 2). 2 Specifications Meter type Specifications Accuracy class Meter constant(imp/kWh) DDS28u 220V 10(60) A Active 11600 3 Technical indexes 3.1 Normal working voltage: 0.8Un 1.1Un 3.2 Limit of working voltage: 0.7Un 1.2Un 3.3 Normal working temperature range: -25C +55C 3.4 Limit of working temperature: -40C +70C 3.5 Humidity: 25%RH 85%RH 3.6 Power consumption: ≤2W(active); ≤2.5VA(apparent) 3.7 Clock accuracy:Daily timing error less than 0.5S(23+-2C) 3.7 Max distance of infrared communication: >4m 3.8 Distance of PLC communication:3 km. of main Power Line. 3.9 Dimension of profile: 164.5*112*71mm(fig.1) 3.10 Net Weight: 0.9 kg 4 Function 4.1 Meter can measure active energy and reactive energy. And reactive energy will be plus to active energy automatically. 4.2 Multi-tariff function 4.2.1 One day can be divided maximally into 10 time periods. Each time period can choose one tariff from four. The maximal time error changing from one tariff to other is 1 second. 4.2.2 One year can be divided maximally into 4 seasons. Each season can choose one period-tariff table from four. The season can be set. The meter can change relative parameters automatically when the season is turning. 4.3 Energy frozen automatically User can set the date and time of the user-read-day. Meter can freeze the total energy and the energy of every tariff at user-read-day of every month automatically. When it run in to a new user-read-day, the new freezing data will replace the old one in the storage of the meter. It can store six days of freezing daily data and eleven month of freezing monthly data at most. 4.4 History energy Record Meter can store history energy data of 12 months, energy data of every tariff and the total number of days when meter has no load. All data can be accessed via infrared or PLC. 4.5 Event Log It can record last five times of power down, including the total happening time of each event plus their respective latest five starting time and ending time. 4.6 Alarm Meter has LCD alarm function, and it can alarm when voltage of the clock battery is too low or user operates falsely. When some part of the meter, for example the relay, works abnormally or the load of the meter is too large, meter also can alarm. All alarm information can be accessed via HHU or PLC. 4.7 Inspecting function 4.8 Data preservation function 4.9 Anti-temper function 4.10 Inspect failure of relay When the relay works abnormally, meter can alarm. 4.11 Compelling control function (remotely control) On the basis of the data real time read form meter, user can control transmitting electricity by switching the relay. User can switch the relay by HHU, when it is unsuccessful to control the relay remotely by energy managing system. 4.12 Real time power control function (automatically control) 4.13 Infrared communication 4.14 Broadcast Rectify 4.15 Input and output interface