Three-Phase Four-Wire Electronic Prepaid Energy Meter
DTSY1889
Three-phase four-wire prepaid metering with class B/C active energy accuracy, 5 tariffs across 14 time segments, prepaid trip control and bidirectional active energy measurement.
Product Overview
Three-phase four-wire prepaid metering with class B/C active energy accuracy, 5 tariffs across 14 time segments, prepaid trip control and bidirectional active energy measurement.
Core capabilities
Accurate bidirectional metering: Class B/C active energy accuracy with forward and reverse active energy measurement.. Multiple communication protocols: RS485 with DL/T645 and MODBUS-RTU, 4G optional.. Multi-tariff time-of-use billing: 5 tariffs, 14 time segments and 8 daily tariff tables..
Data Generated
Product Features
Accurate bidirectional metering
Class B/C active energy accuracy with forward and reverse active energy measurement.
Multiple communication protocols
RS485 with DL/T645 and MODBUS-RTU, 4G optional.
Multi-tariff time-of-use billing
5 tariffs, 14 time segments and 8 daily tariff tables.
Prepaid trip control
Relay output drives prepaid trip, alarm and remote control.
Two form factors
Three-phase 4P and 7P versions, direct or transformer connection.
Long-term data retention
Outage data retained for at least 10 years; clock accuracy ≤0.5s.
System Topology
Technical Parameters
Technical Data
Rated voltage 3×220/380V 50Hz three-phase four-wire Accuracy class Active energy class B (±1.0%/±1.5%) / class C (±0.5%/±1.0%) Current specification 0.2-0.5(30)A, 5(30)A and others (confirmed on order) Communication protocol DL/T645-2007, DL/T645-1997, MODBUS-RTU Communication interface RS485 (dual RS485 on some models), 4G optional Baud rate 1200 / 2400 / 4800 / 9600bps (2400 default)
| Rated voltage | 3×220/380V 50Hz three-phase four-wire |
| Accuracy class | Active energy class B (±1.0%/±1.5%) / class C (±0.5%/±1.0%) |
| Current specification | 0.2-0.5(30)A, 5(30)A and others (confirmed on order) |
| Communication protocol | DL/T645-2007, DL/T645-1997, MODBUS-RTU |
| Communication interface | RS485 (dual RS485 on some models), 4G optional |
| Baud rate | 1200 / 2400 / 4800 / 9600bps (2400 default) |
| Energy constant | 400imp/kWh |
| Billing functions | 5 tariffs / 14 time segments / 8 daily tariff tables, prepaid, forward and reverse active energy |
| Control output | Relay output for prepaid trip, alarm and remote control |
| Display | LCD with push buttons |
| Mounting | 35mm standard DIN rail, recommended height 1.8m |
| Protection requirement | Must be installed in an enclosure rated IP51 or higher |
| Applicable standard | GB/T 17215.321-2021 |
Installation Instructions
Standard 35 mm DIN rail mounting; terminals: supply side L1/L2/L3, N, PE, communication and signal terminals as marked on the device.
Key Points
FAQ
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