Why Choose the ABB A43 112-100 Energy Meter?
The ABB A43 112-100 is an advanced three-phase direct-connected DIN-rail energy meter designed for accurate active energy measurement in commercial, industrial and building energy-monitoring applications. Part of ABB's DIN Rail Mounted Meters range, it combines direct measurement up to 80 A, a large backlit display and integrated RS-485 communication in a robust DIN-rail format.
Designed for three-phase systems with a wide operating voltage range, the A43 112-100 supports both three-wire and four-wire installations. It provides Class B MID / Class 1 active-energy accuracy and measures key electrical parameters including voltage, current, active power, power factor and frequency, providing useful information for energy management and electrical system monitoring.
Integrated RS-485 communication supports Modbus RTU and ABB EQ Bus, allowing measurement and instrumentation data to be incorporated into compatible building management, automation and energy-monitoring systems. Direct connection up to 80 A eliminates the need for external current transformers where the circuit is within the meter's specified current range.
Key Advantages
- Three-phase direct-connected measurement up to 80 A.
- No external current transformers required for circuits within the direct-connection range.
- Wide 3 × 57.7/100–288/500 V AC nominal voltage range.
- Class B MID / Class 1 active-energy accuracy.
- Integrated RS-485 communication for remote monitoring.
- Supports Modbus RTU and ABB EQ Bus communication.
- Provides multiple instrumentation values for detailed three-phase electrical monitoring.
- Supports up to 25 possible alarms and event logging.
- Configurable digital output for energy pulses or alarm functions.
- Suitable for both three-wire and four-wire systems.
- Large backlit display provides clear local indication.
- MID approved and verified and IEC approved.
Key Features
- ABB A43 series energy meter.
- Three-phase direct-connected measurement.
- 5 A nominal current.
- 80 A maximum direct-connected current.
- 3 × 57.7–288 V AC phase-to-neutral rated voltage range.
- 3 × 57.7/100–288/500 V AC system voltage range.
- 50/60 Hz rated frequency.
- Active energy measurement.
- Class B MID / Class 1 active-energy accuracy.
- RS-485 communication interface.
- Modbus RTU / EQ Bus communication.
- One digital output for pulse or alarm functionality.
- Instrumentation values including active power, voltage, current, power factor and frequency.
- Up to 25 possible alarms and event logging.
- Large backlit pixel-oriented display.
- IP20 degree of protection.
Three-Phase Energy Monitoring with RS-485 Communication
The ABB A43 112-100 provides direct-connected three-phase measurement up to 80 A, allowing suitable circuits to be monitored without external current transformers. In addition to active energy consumption, the meter provides instrumentation values including voltage, current, active power, power factor and frequency, supporting detailed analysis of three-phase electrical installations.
Integrated RS-485 communication with Modbus RTU and EQ Bus enables meter data to be incorporated into compatible building management, automation and energy-monitoring systems. Combined with its configurable pulse or alarm output, up to 25 possible alarm conditions and event logging, the A43 112-100 provides both local and centralised visibility of electrical energy use.
Typical Applications
- Commercial building energy monitoring.
- Industrial three-phase energy metering.
- Distribution board and switchboard monitoring.
- Building management systems using RS-485 communication.
- Modbus RTU energy-monitoring networks.
- Three-phase plant and equipment monitoring.
- Tenant, departmental and cost-centre submetering.
- Energy efficiency and consumption analysis.
- Electrical load and instrumentation monitoring.
- Three-phase circuits requiring direct measurement up to 80 A.
