Why Choose the ABB A44 212-100 Energy Meter?
The ABB A44 212-100 is an advanced three-phase CT/VT-connected electricity meter designed for accurate indirect energy measurement in industrial, commercial and building-services installations. Part of the ABB A44 EQ meter series, this Bronze-function meter combines active and reactive energy measurement with integrated RS-485 communication and extensive electrical instrumentation.
Designed for transformer-connected 3-wire and 4-wire three-phase networks, the A44 212-100 has a nominal measurement current of 1 A and supports measurement current up to 6 A. Its wide 3 × 57.7/100–288/500 V AC measurement range and configurable CT/VT ratios provide flexibility across a broad range of electrical distribution systems.
The meter records active and reactive energy in both import and export directions, providing Class B (Class 1) accuracy for active energy and Class 2 accuracy for reactive energy. Integrated RS-485 communication using Modbus RTU or ABB EQ Bus, a configurable pulse/alarm output, instrumentation values and up to 25 configurable alarms make it a versatile solution for connected energy-management systems.
Key Advantages
- Advanced three-phase CT/VT-connected energy meter for indirect measurement.
- Suitable for 3-wire and 4-wire three-phase systems.
- 1 A nominal measurement current with a maximum input current of 6 A.
- Class B (Class 1) active energy accuracy.
- Class 2 reactive energy accuracy.
- Measures active and reactive energy in import and export directions.
- Integrated RS-485 communication for remote meter reading and system integration.
- Supports Modbus RTU and ABB EQ Bus communication.
- Configurable output can provide energy pulses or alarm signalling.
- Up to 25 configurable alarm conditions support detailed electrical monitoring.
- IEC approved and MID approved and verified for professional energy metering.
Key Features
- ABB A44 EQ meter series.
- Bronze functionality level.
- Three-phase transformer-connected electricity meter.
- CT/VT connection with configurable transformer ratios.
- 2-element and 3-element metering capability.
- Nominal measurement current: 1 A.
- Maximum measurement current: 6 A.
- 3 × 57.7/100–288/500 V AC measurement range.
- 50/60 Hz operating frequency.
- Active and reactive energy measurement.
- Separate import and export energy registers plus total energy.
- Class B (Class 1) active energy accuracy.
- Class 2 reactive energy accuracy.
- RS-485 serial communication.
- Modbus RTU and ABB EQ Bus protocols.
- Infrared communication interface.
- One configurable output for energy pulses or alarms.
- Up to 25 configurable alarm conditions.
- Instrumentation values for power, current, voltage, frequency, power factor and apparent power.
- Backlit pixel-oriented digital display.
- Seven-module DIN-rail construction.
Reliable Transformer-Connected Three-Phase Energy Monitoring
The ABB A44 212-100 is designed for installations where higher primary currents are measured through external current transformers rather than being routed directly through the meter. Configurable current and voltage transformer ratios enable the meter to calculate energy values for the primary electrical circuit while providing accurate measurement of both active and reactive energy.
Beyond accumulated energy, the A44 212-100 provides electrical instrumentation values including power, current, line-to-line and line-to-neutral voltage, frequency, power factor and apparent power. Integrated RS-485 communication allows this information to be collected through Modbus RTU or ABB EQ Bus, while the configurable output and alarm functions support integration into wider energy-management and monitoring systems.
Typical Applications
- Industrial three-phase energy monitoring.
- Commercial building electricity metering.
- CT/VT-connected electrical sub-metering.
- Higher-current distribution boards and switchgear.
- Building management systems using Modbus RTU.
- RS-485 energy-monitoring networks.
- Import and export energy measurement.
- Factory and production-facility energy monitoring.
- Three-phase 3-wire and 4-wire distribution systems.
- Energy efficiency and electrical consumption analysis.
