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

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

Product Description

The DSZY208 and DTZY208 Series Three-Phase Prepayment Smart Energy Meters utilize 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, they integrate metering, prepayment control, alarming, display, data freezing, and communication functions into a single device to achieve electricity metering and consumption information storage for users. They are characterized by high metering precision under low current, robust functionality, and excellent stability. They are mainly applied in power plants, large power consumers, distribution transformers, pole-mounted transformers, and various enterprises and public institutions for diverse electrical data measurement and metering, particularly in locations utilizing RS485, GPRS, low-power wireless, or CDMA for data transmission. Their communication protocol fully complies with the requirements of the DL/T698.45 communication protocol standard.

Product Advantages

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Metering Functions

Forward/reverse active energy metering, four-quadrant reactive energy metering, with configurable combination active/reactive energy.
Time-of-Use (TOU) metering, total and each tariff maximum demand along with their times of occurrence.

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Billing Freeze

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

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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. The display content can be toggled via buttons and the 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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Remote Tariff Control Function

The meter receives remote commands such as disconnect, reconnect, and keep-alive from the master station via communication to perform effective credit control, featuring secure authentication and encryption.

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Local Credit Control Function (Optional)

The meter is equipped with an IC card slot, with pre-configured tariff and credit inside, supporting both CPU card and remote power purchasing.

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Communication Functions

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

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Optional Configuration

Power Line Carrier (PLC) communication, GPRS wireless communication, CDMA wireless communication, and Low-Power Wireless (LPW) communication.