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2CMA170525R1000 ABB A43 312-100 Three-Phase Direct-Connected 80 A Energy Meter with RS-485
ABB A43 312-100 is a three-phase direct-connected 80 A DIN-rail energy meter with Class B active energy accuracy, active and reactive import/export measurement, four-tariff capability and RS-485 Modbus RTU or EQ Bus communication.
£336.24
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.
Technical Specifications
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| Measurement Connection Type | CT connection | |
|---|---|---|
| MID Approval | Yes | |
| Current Input Rating (A) | 80 A | |
| Device Type | Energy meter | |
| Series | A43 EQ Meters | |
| ABB order code | 2CMA170525R1000 | |
| Product type | Three-phase electricity / energy meter | |
| Functionality level | Silver | |
| Connection type | Direct connected | |
| Number of phases | 3 | |
| Network configuration | 3-wire / 4-wire | |
| Maximum current | 80 A | |
| Phase-to-neutral voltage | 57.7–288 V AC | |
| Phase-to-phase voltage | 100–500 V AC | |
| System voltage range | 3 × 57.7/100–288/500 V AC | |
| Frequency | 50/60 Hz | |
| Measured energy | Active and reactive energy | |
| Energy direction | Import and export | |
| Active energy accuracy | Class B (Class 1) | |
| Reactive energy accuracy | Class 2 | |
| Tariffs | Up to 4 | |
| Communication interface | RS-485 | |
| Communication protocols | Modbus RTU / EQ Bus | |
| Additional interface | Infrared | |
| Inputs | 2 | |
| Outputs | 2 | |
| Alarm capability | Up to 25 configurable alarms | |
| Display | Backlit pixel-oriented LCD | |
| Protection rating | IP20 | |
| Operating temperature | −40 to +70 °C | |
| Mounting type | DIN rail | |
| Module width | 7 DIN modules | |
| Width | 123 mm | |
| Depth | 65 mm | |
| Product weight | approx. 0.44 kg | |
| Approvals | IEC approved, MID approved and verified |
Frequently Asked Questions
What is the ABB A43 312-100 used for?
The ABB A43 312-100 is used for three-phase direct-connected energy monitoring in industrial, commercial and building-services installations, measuring both active and reactive energy in import and export directions.
What is the maximum current of the ABB A43 312-100?
The meter supports direct-connected measurement up to 80 A, allowing suitable three-phase circuits to be monitored without external current transformers.
What is the accuracy of the ABB A43 312-100?
The A43 312-100 provides Class B (Class 1) accuracy for active energy and Class 2 accuracy for reactive energy.
What communication does the ABB A43 312-100 support?
The meter incorporates RS-485 communication supporting Modbus RTU and ABB EQ Bus, together with an infrared interface for compatible energy-management applications.
Does the ABB A43 312-100 support multiple tariffs?
Yes. The A43 312-100 supports up to four tariffs and includes two inputs and two outputs that can be used for pulse, tariff and alarm functions.
Trusted Energy Measurement from ABB
ABB A43 energy meters combine accurate direct-connected three-phase measurement with multi-tariff functionality, instrumentation, alarms and digital communications, providing dependable energy monitoring for modern commercial and industrial electrical systems.
