Measurement Accuracy
Accuracy Class: Active Power Class 1.0 | Clock Accuracy: Daily error ≤ 0.5 s/d
Current Input
Starting Current: Direct connection: 0.004 Ib; Via CT connection: 0.002 In
Current Specifications: 1.5(6)A, 5(20)A, 10(40)A, 20(80)A | Current Circuit Power Consumption: ≤ 1 VA
Voltage Input
Rated Voltage: 220 V; 3 × 220/380 V
Operating Voltage: Normal operating range: 0.9 – 1.1 Un; Limit operating range: 0.7 – 1.2 Un
Voltage Circuit Power Consumption: ≤ 2 W, 5 VA | Rated Frequency: 50 Hz
Pulse Output
Output Type: Open-collector optocoupler pulse; 1-channel pulse output | Pulse Width: 80 ms ± 20 ms
Communication Network
1-channel RS485 communication interface; Modbus-RTU communication protocol (others customizable) | Communication Rate: 9600 bps (default); 4800 bps, 2400 bps, 1200 bps (selectable) | Mean Time Between Failures (MTBF): Continuous operation time ≥ 50,000 h
Environmental Conditions
Normal Operating Temperature: -10°C to +45°C | Limit Operating Temperature: -20°C to +55°C | Storage Temperature: -40°C to +70°C | Relative Humidity: 5% – 95% (non-condensing); free of corrosive gases | Altitude: ≤ 2500 m
Applications
Due to their miniaturized structure, these DIN-rail mounted energy meters can be conveniently used in conjunction with miniature circuit breakers and installed within terminal lighting distribution boxes. They provide an effective solution for energy metering at low-voltage lighting terminals. They are widely applicable in buildings, shopping malls, exhibition centers, schools, airports, ports, factories, and similar facilities. Specific applications include individual metering and energy consumption monitoring in commercial and public buildings; independent equipment metering and cost allocation in industrial facilities and industrial parks; prepaid smart electricity management in long-term rental apartments and university dormitories; intelligent upgrades during the renovation of older residential communities; bi-directional energy metering in new energy systems; environmental electricity monitoring; and integrated metering cabinet solutions for smart grids and distribution transformer area management.