Why Choose the ABB A44 112-100 Three-Phase Energy Meter?
The ABB A44 112-100 is a high-accuracy three-phase, current transformer (CT) connected electricity meter designed for reliable active energy measurement and electrical consumption monitoring in industrial and commercial installations. As part of the ABB A44 EQ Meter series, it provides accurate electricity metering, digital communication and straightforward integration into modern electrical distribution and energy management systems.
This advanced electricity meter uses external current transformers to measure electrical consumption in three-phase installations where direct-connected metering is unsuitable. It provides Class B (Class 1) active energy measurement accuracy, a clear digital LCD display and an integrated RS-485 communication interface supporting Modbus RTU and ABB EQ Bus communication for remote monitoring and data collection.
With a 1 A reference current, 6 A maximum measurement input and a three-phase voltage range of 3 × 57.7/100–288/500 V AC, the A44 112-100 is suitable for transformer-connected electrical metering applications. Its compact 7-module DIN rail-mounted design, pulse output and MID-approved measurement capability make it a practical choice for energy monitoring, consumption analysis and building management systems.
Key Advantages
- Accurate three-phase CT-connected electricity metering for industrial and commercial installations.
- Class B (Class 1) active energy accuracy supports dependable electricity consumption measurement.
- RS-485 communication with Modbus RTU enables integration with energy management and automation systems.
- External current transformer connection allows metering of higher-current electrical circuits.
- MID-approved and verified measurement design supports applications requiring compliant energy metering.
- Integrated pulse output supports remote energy monitoring and data acquisition.
- Clear LCD display provides convenient access to energy consumption and electrical measurement information.
- Compact 7-module DIN rail-mounted construction simplifies installation inside electrical distribution boards.
Key Features
- ABB A44 EQ Meter series.
- Three-phase transformer-connected electricity meter.
- Class B (Class 1) active energy measurement accuracy.
- 1 A reference current with maximum current input of 6 A.
- Three-phase 57.7/100–288/500 V AC measurement range.
- Designed for use with external current transformers and compatible voltage transformer arrangements.
- RS-485 communication interface supporting Modbus RTU and EQ Bus.
- Infrared communication port supporting M-Bus communication.
- Integrated pulse output for energy monitoring or alarm signalling.
- LCD display for active energy and available electrical instrumentation values.
- Supports two-element and three-element metering configurations.
- Integrated alarm functionality for electrical monitoring applications.
- MID-approved and IEC-compliant electricity metering.
- Compact 7 DIN module width for distribution board installation.
- IP20 protection rating for installation within suitable electrical enclosures.
Technical Specifications
- Manufacturer: ABB
- Series: A44 EQ Meters
- Model: A44 112-100
- ABB order code: 2CMA100248R1000
- Product group: DIN Rail Mounted Meters
- Product type: Three-phase CT-connected electricity meter
- Meter functionality: Steel – active energy measurement
- Measurement system: Three-phase
- Connection type: Transformer connected (CT/VT)
- Measured energy: Active electrical energy
- Active energy accuracy: Class B (Class 1)
- Reference current: 1 A
- Maximum current input: 6 A
- Voltage measurement range: 3 × 57.7/100–288/500 V AC
- Rated frequency: 50/60 Hz
- Communication interface: RS-485
- Communication protocols: Modbus RTU / ABB EQ Bus
- Optical communication: Infrared M-Bus port
- Output: 1 configurable pulse/alarm output
- Display type: Digital LCD
- Metering configurations: Two-element and three-element
- Tariff measurement: Single tariff
- Alarm functionality: Supported
- Measurement approval: MID approved and verified
- Applicable standards: IEC 62052-11, IEC 62053-21, EN 50470-1 and EN 50470-3
- Protection rating: IP20
- Mounting type: DIN rail mounting
- Module width: 7 DIN modules
- Product dimensions (H × W × D): 97 × 123 × 65 mm
- Weight: Approximately 0.35 kg
Reliable Energy Monitoring for Industrial Electrical Systems
Three-phase electricity meters such as the ABB A44 112-100 measure electrical energy consumption to help facility operators understand how electricity is used throughout industrial and commercial installations. By using external current transformers, the meter can monitor higher-current circuits while maintaining a suitable measurement input at the meter terminals. This makes transformer-connected metering particularly useful in electrical distribution boards, industrial switchgear and building energy management installations.
The ABB A44 series is designed to support accurate energy measurement and integration with electrical monitoring systems. The A44 112-100 combines Class B active energy accuracy, RS-485 Modbus communication, a configurable pulse output and DIN rail mounting to enable practical energy data collection. Its communication capabilities allow measured consumption data to be incorporated into supervisory monitoring platforms, building management systems and industrial energy reporting applications.
Typical Applications
- Three-phase electricity consumption monitoring.
- Industrial electrical distribution boards and switchgear.
- Commercial building energy management systems.
- Factory and manufacturing facility energy monitoring.
- Current transformer-connected metering installations.
- Electrical submetering and consumption analysis.
- Building management systems using Modbus communication.
- Industrial automation and remote energy data acquisition.
- Energy efficiency monitoring and reporting.
- Electrical infrastructure requiring MID-approved energy measurement.
