ORNO OR-WE-521 Single-Phase Electricity Meter 230V 40A DIN Rail LCD Backlight

The ORNO OR-WE-521 is a high-quality single-phase electricity meter designed for accurate active energy measurement in residential and light commercial installations. With a compact 1 DIN module design, it fits easily into standard TH-35mm DIN rail enclosures, making it ideal for distribution boards and sub-metering applications.

Advantages

This meter offers Class 1 accuracy (per EN 50470-1/3) for reliable billing-grade measurement. The large LCD display with backlight ensures easy reading even in low-light conditions. Its S0 pulse output (1200 imp/kWh) enables remote monitoring and integration with energy management systems. Low power consumption (<1W / 6VA) and wide operating temperature range (-20°C to +55°C) ensure long-term stability.

Suitable for

• Residential energy monitoring
• Small commercial sub-metering
• DIN rail distribution boards
• Integration with building management systems

Key specifications

• Measurement: Active energy (kWh)
• Phase: Single-phase
• Accuracy class: Class 1 (EN 50470-1/3)
• Nominal voltage: 230V AC
• Frequency: 50/60 Hz
• Nominal current: 5A
• Maximum current: 40A
• Minimum current: 0.25A
• Starting current: 0.02A
• Display: LCD, 6+2 digits (999999.99 kWh)
• Mounting: DIN rail (TH-35mm), 1 module
• Pulse output: S0 (1200 imp/kWh)
• Protection rating: IP20
• Power consumption: <1W / 6VA
• Terminal capacity: up to 25mm²

Recommendations

For optimal performance, install the meter in a clean, dry environment within the specified temperature range. Ensure proper tightening of terminals to avoid overheating. The S0 output can be connected to an external pulse counter or energy monitoring system.