Why Choose the ABB A43 312-100 Energy Meter?
The ABB A43 312-100 is an advanced three-phase direct-connected electricity meter designed for accurate energy measurement in industrial, commercial and building-services installations. As part of the ABB A43 EQ meter series, this Silver-function meter combines direct measurement up to 80 A with active and reactive energy monitoring, multi-tariff functionality and integrated RS-485 communication.
Designed for direct connection without external current transformers, the A43 312-100 can be used in 3-wire and 4-wire three-phase systems across a wide voltage range. It measures active and reactive energy in both import and export directions, with Class B (Class 1) active energy accuracy and Class 2 reactive energy accuracy. Separate energy registers, a total register and a resettable intermediate register support detailed consumption and energy-flow analysis.
The meter supports up to four tariffs and incorporates two inputs and two outputs for pulse, tariff and alarm functions. Integrated RS-485 communication using Modbus RTU or ABB EQ Bus, extensive instrumentation values, up to 25 alarms and event logging make the A43 312-100 well suited to connected energy-management and building-automation systems.
Key Advantages
- Advanced three-phase direct-connected energy meter for professional installations.
- Direct measurement up to 80 A without external current transformers.
- Suitable for 3-wire and 4-wire three-phase systems.
- Class B (Class 1) active energy accuracy for dependable energy monitoring.
- Measures active and reactive energy in import and export directions.
- Integrated RS-485 communication supports Modbus RTU and ABB EQ Bus.
- Supports up to four tariffs for detailed energy allocation.
- Two inputs and two outputs provide flexible pulse, tariff and alarm functionality.
- Instrumentation values, alarms and event logging support comprehensive electrical monitoring.
- IEC approved and MID approved and verified for professional metering applications.
Key Features
- ABB A43 EQ meter series.
- Silver functionality level.
- Three-phase direct-connected electricity meter.
- Maximum direct current: 80 A.
- 3 × 57.7/100–288/500 V AC measurement range.
- 50/60 Hz operating frequency.
- Class B (Class 1) active energy accuracy.
- Class 2 reactive energy accuracy.
- Active and reactive energy measurement.
- Import and export energy stored in separate registers plus a total register.
- Resettable register for intermediate energy values.
- Up to four energy tariffs.
- RS-485 serial communication.
- Modbus RTU and ABB EQ Bus protocols.
- Infrared communication interface.
- Two inputs and two outputs for pulse, tariff and alarm functions.
- Multiple electrical instrumentation values.
- Up to 25 configurable alarm conditions.
- Event logging functionality.
- Large backlit pixel-oriented display.
- Seven-module DIN-rail construction.
Reliable Direct-Connected Three-Phase Energy Monitoring
Direct-connected meters such as the ABB A43 312-100 measure three-phase electricity without requiring external current transformers on circuits within the meter's 80 A rating. This simplifies installation while providing detailed active and reactive energy information for both imported and exported electricity.
The A43 312-100 extends energy measurement with instrumentation values for electrical parameters, configurable alarms and event logging. Its RS-485 interface enables remote access using Modbus RTU or ABB EQ Bus, allowing the meter to be incorporated into compatible building-management, industrial automation and energy-monitoring systems.
Typical Applications
- Commercial building energy monitoring.
- Industrial three-phase electrical distribution.
- Direct-connected sub-metering up to 80 A.
- Building management systems using Modbus RTU.
- RS-485 energy-monitoring networks.
- Import and export energy measurement.
- Renewable and distributed-generation monitoring.
- Tenant and departmental electricity allocation.
- Multi-tariff electricity monitoring.
- Energy efficiency and electrical consumption analysis.
