Why Choose the ABB A44 552-100 Energy Meter?
The ABB A44 552-100 is an advanced three-phase CT-connected electricity meter designed for high-accuracy energy measurement and detailed power monitoring in industrial, commercial and building-services installations. Part of the ABB A44 EQ meter series, this Platinum-function meter combines transformer-connected measurement with comprehensive instrumentation, load profiling, harmonic analysis and RS-485 communications.
Designed for indirect measurement through external current transformers, the A44 552-100 has a nominal measurement current of 1 A and supports measurement current up to 6 A. It is suitable for 3-wire and 4-wire three-phase systems and supports a broad 3 × 57.7/100–288/500 V AC rated system voltage range.
The meter measures active and reactive energy in import and export directions, with Class C / Class 0.5 S active energy accuracy and Class 2 reactive energy accuracy. Platinum functionality adds four tariffs, minimum and maximum demand, previous values, an 8-channel load profile, event logging and harmonic measurement up to the 16th harmonic, while RS-485 Modbus RTU or ABB EQ Bus communication enables integration with compatible energy-management systems.
Key Advantages
- Advanced three-phase transformer-connected energy meter for indirect measurement.
- Platinum functionality level for comprehensive energy and power monitoring.
- 1 A nominal measurement current with maximum input current of 6 A.
- Supports external CTs with 1 A or 5 A secondary ratings.
- Suitable for 3-wire and 4-wire three-phase systems.
- Class C / Class 0.5 S active energy accuracy for high-accuracy metering.
- Measures active and reactive energy in import and export directions.
- Integrated RS-485 communication supporting Modbus RTU and ABB EQ Bus.
- Four configurable I/O channels provide flexible pulse and alarm functionality.
- Advanced 8-channel load profiling supports detailed consumption analysis.
- Measures harmonics up to the 16th harmonic and provides THD monitoring.
- IEC approved and MID approved and verified for professional metering applications.
Key Features
- ABB A44 EQ meter series.
- Platinum functionality level.
- Three-phase transformer-connected electricity meter.
- CT connection with configurable transformer ratios.
- Nominal current: 1 A.
- Maximum measurement current: 6 A.
- Compatible with 1 A and 5 A CT secondary circuits.
- 3 × 57.7/100–288/500 V AC rated system voltage.
- 50/60 Hz rated frequency.
- Class C / Class 0.5 S active energy accuracy.
- Class 2 reactive energy accuracy.
- Four-quadrant active and reactive energy measurement.
- Separate import and export energy registers plus total energy.
- Resettable register for intermediate energy values.
- Four energy tariffs with tariff control via inputs, communication or internal clock.
- Previous-value recording and minimum/maximum demand monitoring.
- Timestamped event logging.
- 8-channel load profile.
- Harmonic measurement up to the 16th harmonic and THD monitoring.
- Four programmable input/output channels.
- RS-485 communication via Modbus RTU or ABB EQ Bus.
- Infrared communication interface.
- Up to 25 configurable alarm conditions.
- Large backlit pixel-oriented display.
- Seven-module DIN-rail construction.
Advanced Three-Phase Energy and Power-Quality Monitoring
The ABB A44 552-100 is designed for three-phase installations where load current is measured indirectly through external current transformers. Its Class C / Class 0.5 S active energy accuracy provides precise transformer-connected measurement, while four-quadrant metering records both consumption and generation through separate import and export registers.
Platinum functionality extends the meter beyond conventional energy measurement with four tariffs, previous values, minimum and maximum demand, timestamped event logs, an 8-channel load profile and harmonic measurement up to the 16th harmonic. RS-485 Modbus RTU or ABB EQ Bus communication and four configurable I/O channels make the meter particularly suitable for integration into advanced industrial, building-management and energy-monitoring systems.
Typical Applications
- Industrial three-phase energy monitoring.
- Commercial building electricity metering.
- CT-connected electrical sub-metering.
- Higher-current distribution boards and switchgear.
- Building management systems using Modbus RTU.
- RS-485 energy-management networks.
- Import and export energy measurement.
- Multi-tariff electricity monitoring.
- Maximum-demand and load-profile analysis.
- Harmonic and THD monitoring.
- Factory and production-facility energy management.
- Energy efficiency and detailed consumption analysis.
