WAGO 879-3040 MID Energy Meter for Current Transformer Connection, 1 A / 5 A, Three-Phase

Three-phase energy meter with MID certification and indirect current transformer connection, engineered for precise bidirectional energy measurement in industrial and commercial power distribution systems. Its Class B accuracy (EN 50470-3) and support for 1 A or 5 A secondary currents make it a versatile choice for sub-metering, cost allocation, and energy management applications.

Advantages

MID-certified for legal metrology, enabling billing-grade measurement without additional verification. The meter accepts both 1 A and 5 A current transformer secondary outputs, reducing inventory complexity. Integrated Modbus RTU, M-Bus, and S0 pulse interfaces provide flexible data integration with building management systems, PLCs, and energy monitoring platforms. A backlit LCD ensures clear reading even in low-light environments, while the compact 4-module DIN rail housing saves valuable panel space.

Suitable for

• Energy sub-metering in commercial buildings and industrial facilities
• Monitoring of three-phase loads with current transformers up to 6 A secondary
• Cost allocation and tenant billing in multi-occupancy properties
• Integration into Modbus or M-Bus based energy management systems
• Bidirectional energy flow measurement for renewable energy installations

Key specifications

• Measurement type: Indirect via current transformers (1 A / 5 A secondary)
• Phases: 3-phase 4-wire (also suitable for 3-phase 3-wire and 1-phase)
• Nominal voltage: 3 x 230/400 V AC (L-N / L-L), range 0.8–1.2 Un
• Frequency: 50/60 Hz
• Accuracy class: B (EN 50470-3)
• Interfaces: Modbus RTU, M-Bus, S0 pulse output
• Display: Backlit LCD
• Mounting: DIN rail, 4 modules

Recommendations

For reliable billing-grade energy measurement in three-phase systems, pair this meter with WAGO current transformers and a compatible Modbus or M-Bus gateway for seamless data integration.