1、 Purpose:

The DDZY2255 single-phase cost controlled intelligent energy meter (hereinafter referred to as the energy meter) is designed and manufactured using large-scale integrated circuits and digital sampling technology, in accordance with the requirements of the "informationization, automation, and interactivity" construction of smart grids for energy meters. It is mainly used for energy metering of single-phase residential users in smart grids.

2、 The electric energy meter meets the standard

The electric energy meter complies with the relevant requirements of GB/T 17215.321-2008 "Static Active Energy Meter (Level 1 and Level 2)", DL/T645-2007 "Communication Protocol for Multi functional Electric Energy Meter" and other standards.

3、 Main functional features

It has the functions of measuring and storing positive and negative active power, combined active power total and divided rate electricity, and the characteristic word of combined active power can be set;
It has the function of storing historical electricity for the previous 12 settlement cycles, and can store the total and sub rate electricity data of forward and reverse active power, combined active power;
Having two sets of rate time zone and time period tables, which can be automatically converted at agreed upon times;
Equipped with power outage display function, the display can be awakened through buttons or infrared (or visible light changes) after power outage;
Equipped with infrared communication port, RS485 communication port, carrier communication port, convenient for exchanging data with the outside world;
Adopting fully automatic software calibration technology, the calibration is simple, fast, and accurate;
Real time measurement function: capable of measuring various operating parameters of the power grid, such as voltage, current, active power, power factor, frequency, etc.
It can record the last 10 power outages, event reset, meter reset, timing events, total number of programming (including time periods, time zone tables, etc.), programming occurrence time data information, and operator code.
Record the total number of times the meter cover is opened and closed, as well as the time of the last 10 occurrences, the end time, and the energy data after opening the meter cover.
Power freezing function: It has instant freezing, timed freezing, hourly freezing, daily freezing, time zone table switching freezing, and daily time period table switching freezing.
Power outage wake-up function: After a power outage, the energy meter can be awakened through contact or non-contact means.
Remote opening and closing function: supports remote power on/off control, and the external control energy meter is used in conjunction with the customer's circuit breaker.

4、 Main technical parameter requirements for electric energy meters

Reference voltage (V): 220V
Frequency: 50Hz
Accuracy level: Level 2
Current specification: 5(60)A

5、 Working temperature range

Specify the working temperature range:- 10℃ ～+45℃
Extreme operating temperature range:- 25℃～+55℃
Storage and transportation limit temperature range:- 25℃～+70℃