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

A smart energy meter integrated with metering, prepayment control, alarming, display, data freezing, and communication functions.

Product Description

The DDZ208-Z/J Series Class A Single-Phase Smart Energy Meter (Communication Module – Internal Breaker) / Class A Single-Phase Smart Energy Meter (Communication Module – External Breaker) complies with the CSG 2021 Enterprise Standard. It utilizes advanced professional energy metering chips, featuring a built-in temperature-compensated hardware clock and an ESAM security encryption chip. Manufactured with advanced microelectronics technology and SMT production processes, it integrates metering, prepayment control, alarming, display, data freezing, and communication functions into a single device to achieve electricity metering and consumption information storage for residential users. Characterized by high precision, robust functionality, and excellent stability, it offers options for either an internal or external load switch, along with selectable communication modules such as Power Line Carrier (PLC) and low-power wireless communication. Its communication protocol fully complies with the requirements of the DL/T 645-2007 Multi-function Watt-hour Meter Communication Protocol standard.

Product Advantages

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Metering Functions

Forward/reverse active energy metering, supporting configurable combination active energy calculation modes via a mode word. Time-of-Use (TOU) metering.

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Freeze Function

Total energy, active energy under each tariff, and combination active energy cumulative electricity consumption for 24-month billing settlement.
Daily freezing (254 days), hourly freezing (254 records), monthly freezing (24 records), timed freezing, instantaneous freezing, and agreed freezing.

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Measurement and Monitoring Function

Measures, records, and displays real-time operating parameters of the energy meter, including voltage, current (including neutral line), power, power factor, and frequency.

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Event Logging Function

Records events such as time synchronization, programming, power failure, meter reset, cover opening, and connect/disconnect operations.

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Tariff & Time Periods

12 tariffs, including sharp, peak, shoulder, and valley.
Supports the configuration of special tariff time periods for holidays and weekends.

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Display Function

Features a Chinese-character LCD display, with configurable display content.

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Alarm Function

Triggers alarms via symbols on the LCD display.

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Remote Prepayment Control

By receiving commands such as disconnection, connection, and power preservation dispatched from the remote master station/vending system, it performs effective prepayment control, with the prepayment process executed in an encrypted manner.

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Communication Functions

Equipped with a Bluetooth communication interface, an RS485 communication interface, and an infrared communication interface, it can simultaneously adopt plug-and-play dual-mode/broadband/low-power wireless modules to achieve power line carrier/wireless communication.