DDZ722-J/Z Southern Grid Series Single-Phase Smart Prepaid Energy Meter

1.1 Energy Metering Function

 Supports forward and reverse active energy metering

 Capable of storing energy consumption data and setting total active energy as a combination of both directions

 Supports four-rate energy metering, with storage for total energy and rate-specific energy data over the last 12 months

 Customizable timestamp for monthly data storage

1.2 Remote Prepaid Control

 Supports remote disconnection, reconnection, ESAM data reading, and other operations, all performed after password verification and secure authentication

 DDZ722-J: Supports wireless communication for remote data reading and control

 DDZ722-Z: Supports low-voltage power line carrier (PLC) communication for remote data reading and control

1.3 Measurement and Monitoring

Real-time monitoring of operational parameters such as voltage, current (including neutral line current), power, and power factor

Measurement error (reference error) does not exceed ±1%

1.4 Event Logging

Permanently records key events such as reset, energy data changes, programming, time calibration, power outage, remote control operations, and meter cover  opening

Each event log includes the time of occurrence, end time, and relevant data

The last 10 events are traceable, ensuring data security and transparent operations

1.5 Tariff and Time Period Management

 Supports configuration of two sets of tariff time schedules with automatic switching

 Minimum time interval of 15 minutes

 Time periods can be configured across midnight to support complex billing schemes

Efficient Fee Control: Combines remote operations with security verification for flexible and safe electricity management

Smart Monitoring: Accurate measurement of electrical parameters with real-time transparency

Event Traceability: Comprehensive event logs provide valuable data for operation and maintenance

Multi-Tariff Support: Flexible tariff and time segmentation to suit various billing requirements

The DDZ722-J/Z series meets the following national and industry standards:

GB/T 17215.321-2021: AC Electricity Metering Equipment – Particular Requirements – Part 21: Static Active Energy Meters (Class A, B, C, D, and E)

 DL/T 614-2007: Technical Specification for Multifunction Energy Meters

 DL/T 645-2007: Communication Protocol for Multifunction Energy Meters