single phase din rail multifunction power meter

DDS318 is a precision single-phase DIN-rail energy meter that provides Class 1.0 accuracy active energy measurement compliant with IEC 62053-21 and GB/T 17215.321-2008 standards. Designed for 220V AC systems (50/60Hz), it supports current ranges from 1.5(6)A to 20(80)A via direct or CT access wiring. The compact device (76x91x74mm) features a large LCD displaying voltage, current, power, frequency, power factor, and cumulative energy values (kWh/kVarh), with front-panel navigation buttons for data review.

Key functionalities include RS-485 communication using MODBUS-RTU or DL/T645 protocols for remote data reading, configurable baud rates (1200–9600bps), and infrared local data transcription. Advanced multi-tariff support enables complex rate scheduling with 4 tariffs (Super Peak/Peak/Flat/Valley), 2 annual time zones, and 8 daily periods. Pulse output (optocoupler-isolated) and IP51-rated dust/water resistance ensure reliability in industrial environments.

Safety-certified for Type II installations, the meter mandates qualified personnel for installation/maintenance and requires intact lead seals for warranty (18 months). Operating within -20°C to +55°C and ≤75% humidity, it consumes ≤5VA per phase. Typical applications include submetering, energy management systems, and cost allocation in commercial/industrial settings. Technical support is provided through authorized suppliers.

1. ​Remote Monitoring: RS-485 communication for data logging (kWh, voltage, etc.).
2. ​Multi-Rate Billing: Flexible time-of-use programming for cost optimization.
3. ​Pulse Output: Isolated signal for external energy monitoring systems.
4. ​Robust Design: IP51-rated for harsh environments; DIN-rail mounting.
5. ​High Reliability: 50,000+ hours MTBF; redundant data storage.