Class A Single-Phase Smart Electricity Meter (CSG 21 Standard)

A smart electricity meter integrating metering, tariff control, alarm, display, freeze, and communication functions.

Product Description

The DDZ208-Z/J Class A Single-Phase Smart Electricity Meter (Communication Module – Built-in Switch) / Class A Single-Phase Smart Electricity Meter (Communication Module – External Switch) complies with the CSG 21 enterprise standard. It utilizes advanced professional energy metering chips, a hardware clock with built-in temperature compensation, and an ESAM security encryption chip. Manufactured with advanced microelectronics technology and SMT production processes, it integrates metering, tariff control, alarm, display, freeze, and communication functions, enabling electricity metering and consumption data storage for residential users. Featuring high accuracy, strong functionality, and excellent stability, it is available with built-in or external load switches and optional communication modules such as carrier communication and micro-power wireless communication. Its communication protocol complies with the DL/T645-2007 “Multi-function Meter Communication Protocol” standard.

Product Advantages

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Metering Functions

Measures forward active energy and reverse active energy, supporting combined active energy calculation via mode word settings.
Time-of-use metering.

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Freeze function

Total energy, energy by tariff, and combined active cumulative consumption for 24-month settlement.
Daily freeze (254 days), hourly freeze (254 records), monthly freeze (24 records), scheduled freeze, instantaneous freeze, and agreed freeze.

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Measurement and monitoring function

Measures, records, and displays current operating parameters of the electricity meter, including voltage, current (including neutral), power, power factor, and frequency.

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Event recording function

Records events such as time synchronization, programming, power failure, meter reset, cover opening, and switch on/off.

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Time Zones and Tariffs

Supports 12 tariff rates including peak, flat, and valley.
Supports special tariff period settings for holidays and weekends.

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Display Functions

Uses a localized LCD display with configurable display content.

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Alarm Functions

Alarms are indicated by symbols on the LCD.

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Remote Tariff Control

Receives commands such as switch off, switch on, and power hold from the remote master station/electricity sales system for effective demand-side management, with encrypted control processes.

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Communication Functions

Equipped with Bluetooth, RS485, and infrared communication interfaces, and supports plug-and-play dual-mode/broadband/micropower wireless modules for power line carrier/wireless communication.