Why Choose the ABB A44 552-110 Three-Phase Energy Meter?
The ABB A44 552-110 is an advanced transformer-connected three-phase electricity meter designed for accurate energy measurement in industrial and commercial electrical systems operating at voltages up to 690 V AC. As part of the ABB A44 DIN rail mounted meter range, this Platinum-level meter combines high-accuracy active and reactive energy measurement with detailed instrumentation, load profiling and power-quality monitoring.
The A44 552-110 measures active and reactive energy in both import and export directions and supports up to four tariffs. Its integrated RS-485 interface with Modbus RTU communication enables connection to compatible building-management, energy-management and remote-meter-reading systems, while advanced functions include demand monitoring, event logging, load profiles, harmonics and Total Harmonic Distortion (THD).
Designed specifically for transformer-connected applications, the meter supports a maximum secondary current of 6 A and a rated voltage range of 3 × 57.7/100–400/690 V AC. Its 690 V capability allows suitable installations to be metered without additional voltage transformers, while the compact 7-module DIN rail format simplifies installation in switchboards and electrical control panels.
Key Advantages
- Advanced three-phase transformer-connected energy meter for industrial and commercial installations.
- Designed for electrical systems up to 690 V AC phase-to-phase.
- Class C / Class 0.5 S active-energy accuracy for high-accuracy metering.
- Measures active and reactive energy in both import and export directions.
- Integrated RS-485 communication with Modbus RTU for remote energy monitoring.
- Advanced load profiling, demand, harmonics and THD monitoring.
- Low meter power consumption helps improve efficiency in large metering installations.
Key Features
- ABB A44 three-phase energy meter series.
- Platinum functionality level.
- CT/VT transformer-connected metering for three- and four-wire systems.
- 6 A maximum current.
- 3 × 57.7/100–400/690 V AC rated voltage range.
- Class C / Class 0.5 S active-energy accuracy.
- Class 2 reactive-energy accuracy.
- Active and reactive energy measurement for import and export.
- Supports up to four tariffs.
- Integrated RS-485 interface with Modbus RTU / EQ Bus communication.
- One fixed input and one fixed output for external control and signalling functions.
- Maximum and minimum demand measurement and previous-value storage.
- Eight-channel load profile for detailed energy analysis.
- Voltage and current harmonic measurement up to the 16th harmonic.
- Total Harmonic Distortion (THD) measurement for voltage and current.
- Multiple configurable alarm functions and timestamped event logging.
- Backlit pixel-oriented digital display.
- Compact 7 DIN-module mounting format.
Advanced 690 V Energy and Power-Quality Monitoring
Transformer-connected electricity meters such as the ABB A44 552-110 provide accurate measurement in higher-current electrical installations by using external current transformers. The meter's extended voltage range also enables direct voltage measurement in suitable 690 V AC installations, helping reduce the need for additional voltage transformers and simplifying panel design and wiring.
The Platinum-level A44 552-110 extends conventional energy metering with detailed electrical instrumentation, maximum and minimum demand, load profiling, event logging and power-quality analysis. Its RS-485 interface supports integration with compatible Modbus RTU systems, while harmonic and THD measurements provide additional insight into the condition and quality of the electrical supply.
Typical Applications
- Industrial 690 V AC electrical systems.
- Three-phase motor and machinery energy monitoring.
- Industrial switchboards and distribution panels.
- CT-connected commercial and industrial energy metering.
- Building-management and energy-management systems.
- Multi-tariff electricity monitoring.
- Demand, load-profile and power-quality analysis.
- Remote meter reading through RS-485 and Modbus RTU networks.
