Three Phase Electronic Energy Meter ZMDST2788 and DSSY2788 Electronic Three-Phase Prepaid Electric Energy Meters are new types of IC card-based prepaid electric energy meters with multiple functions including electric energy measurement, load control, and user information management. They are ideal products for reforming the electricity management system, commercializing electric energy, solving difficulties in fee collection, and regulating grid load conditions.
This series of electronic three-phase electric energy meters supports two connection methods: direct connection or connection via current transformers.
All performance indicators of the product comply with the full technical requirements for electronic three-phase prepaid electric energy meters specified in the standards GB/T 17215.321-2008 Class 1 and Class 2 Static Alternating Current Active Watt-Hour Meters and GB/T 18460.3-2001.
Technical Functions
◆ Measures three – phase active electrical energy, no need for calibration during long – term operation;
◆ Powered by three – phase power supply. If one wire (any one of the three wires of a three – phase three – wire energy meter) or two wires (any two of the four wires of a three – phase four – wire energy meter) is disconnected, the measurement accuracy is not affected;
◆ Wide operating temperature range;
◆ Has phase – failure indication function or voltage indication function;
◆ Display methods: counter, liquid crystal;
◆ Has remote power – off function
◆ Output interface RS485.
| Rated Current（A） | Rated Voltage（V） | Rated Frequency (Hz) | Accuracy Class |
| 3*1.5（6），385（20） | Three-Phase Three-Wire 3*380V | 50 or 60 | Class 1 or Class 2 |
| 3*10（40）,3*15（60） | Three-Phase Four-Wire 3*220/380V or 3*57.7/100v | ||
| 3*20（80），3*30（100） |
