Class C/D Three-Phase Smart Energy Meter (State Grid 2020 Standard)

A high-precision smart energy meter that integrates metering, demand calculation, display, data freeze, and communication functions.

Product Description

The DSZ208/DTZ208 series three-phase smart energy meters utilize advanced specialized energy metering chips, featuring a built-in temperature-compensated hardware clock and an ESAM security encryption chip. Manufactured with state-of-the-art microelectronics technology and SMT production processes, the series integrates metering, alarm, display, data freeze, and communication functions into a single device to achieve accurate user electricity metering and data storage. Characterized by high precision, robust functionality, and exceptional stability, the meters fully comply with the technical, functional, type-testing, and security specifications of the State Grid 2020 Three-Phase Smart Energy Meter. Furthermore, their communication protocol strictly conforms to the DL/T 698.45 standard.

Product Advantages

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Metering Functions

Supports forward/reverse active metering and four-quadrant reactive metering, with configurable combined active/reactive energy.
Time-of-Use (TOU) metering, total and per-tariff maximum demand with timestamps.

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Billing Freeze

13-month settlement for forward/reverse active energy and demand.
Daily, hourly, scheduled, instantaneous, designated, and minute-by-minute freeze.

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Measurement and Monitoring Functions

Measure operating parameters such as voltage, current, active power, reactive power, and power factor.

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Event Logging Function

Record events including voltage loss, under-voltage, phase failure, current loss, current interruption, over-current, overload, total voltage loss, phase reverse, reverse flow, demand limit clearance, voltage/current unbalance, power factor under limit, clock calibration, programming, power failure, meter clearing, cover open, and load switch operations.

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Time-of-Use (TOU) and Tariff Functions

Supports up to 8 tariffs with switching between active and passive tariff structures. It also supports setting special TOU periods for public holidays and weekends.

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Display Functions

Equipped with a large backlit alphanumeric LCD; display content can be toggled via push-buttons, and display items are flexibly configurable.

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Fault Indication

Display relevant symbols or characters on the LCD to indicate faults.

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Communication Functions

Equipped with 2x RS485 communication ports and 1x infrared communication port.

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Auxiliary Power Supply Function