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2CMA100169R1000 ABB B23 312-100 65A Three-Phase Direct RS-485 Energy Meter
ABB B23 312-100 is a DIN-rail mounted three-phase direct-connected energy meter for loads up to 65 A, providing active and reactive import/export measurement, four-tariff capability, RS-485 Modbus RTU and EQ Bus communications, pulse and alarm I/O and MID approval.
£318.41
Why Choose the ABB B23 312-100 Three-Phase Energy Meter?
The ABB B23 312-100 is an advanced three-phase direct-connected electricity meter designed for accurate energy monitoring in commercial, residential and light-industrial electrical installations. Part of ABB's B23 DIN-rail mounted meter range, it supports direct connection of loads up to 65 A, eliminating the need for external current transformers in suitable applications.
Designed for 3-wire and 4-wire three-phase networks, the B23 312-100 measures active and reactive energy in both import and export directions. Its Silver functionality provides comprehensive instrumentation values, event logging, up to 25 alarm functions, a resettable intermediate register and support for up to four tariffs, making it suitable for detailed energy monitoring and sub-metering.
A key feature of this model is its integrated RS-485 communication interface, supporting Modbus RTU and ABB EQ Bus for connection to building-management, energy-management and monitoring systems. Combined with two inputs, two outputs, an infrared interface, Class B active-energy accuracy and MID approval and verification, the B23 312-100 provides a versatile connected metering solution.
Key Advantages
- Direct-connected three-phase metering up to 65 A without external current transformers.
- Integrated RS-485 communications for connected energy monitoring.
- Supports Modbus RTU and ABB EQ Bus communication protocols.
- Measures active and reactive energy in both import and export directions.
- Suitable for 3-wire and 4-wire three-phase networks.
- Class B / Class 1 active-energy accuracy for dependable electricity measurement.
- Class 2 reactive-energy accuracy.
- Supports up to four tariffs for detailed consumption allocation.
- Two inputs and two outputs support pulse, tariff-control and alarm functions.
- MID approved and verified for compliant metering applications.
Key Features
- ABB B23 series three-phase energy meter.
- Silver functionality level.
- Direct-connected measurement up to 65 A.
- Suitable for three-phase 3-wire and 4-wire systems.
- 220–240 V phase-to-neutral rated voltage.
- 380–415 V phase-to-phase rated voltage.
- 50/60 Hz operating frequency.
- Active energy import and export measurement.
- Reactive energy import and export measurement.
- Resettable intermediate energy register.
- Support for up to four tariffs.
- Two inputs and two outputs for pulse, alarm and tariff functions.
- Up to 25 configurable alarm functions and event logging.
- RS-485 Modbus RTU / EQ Bus communication.
- Integrated infrared communication interface.
- Easy-to-read backlit digital display.
- Compact 4 DIN-module construction.
- IP20 degree of protection.
Connected Three-Phase Energy Metering via RS-485
The ABB B23 312-100 provides direct-connected energy measurement for three-phase loads up to 65 A, allowing suitable installations to be monitored without external current transformers. It records active and reactive energy in both import and export directions while also providing electrical instrumentation values for detailed monitoring of the connected network.
Its integrated RS-485 interface supports Modbus RTU and ABB EQ Bus, enabling meter data to be integrated into compatible building-management, energy-management, automation and supervisory systems. Combined with multi-tariff measurement, pulse and alarm I/O, event logging and local infrared communication, the B23 312-100 is well suited to connected sub-metering and energy-efficiency applications.
Typical Applications
- Commercial building energy monitoring.
- Residential three-phase electricity metering.
- Light-industrial electrical installations.
- Three-phase distribution boards and switchboards.
- Direct-connected loads up to 65 A.
- 3-wire and 4-wire three-phase networks.
- Active and reactive import/export energy monitoring.
- RS-485 Modbus energy-management systems.
- Building-management and automation systems.
- Multi-tariff electricity metering and sub-metering.
- MID-compliant metering applications.
Technical Specifications
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| Measurement Connection Type | CT connection | |
|---|---|---|
| MID Approval | Yes | |
| Current Input Rating (A) | 65 A | |
| Device Type | Energy meter | |
| Series | B23 | |
| ABB type designation | B23 312-100 | |
| ABB order code | 2CMA100169R1000 | |
| EAN / GTIN | 7392696001694 | |
| Product group | DIN Rail Mounted Meters | |
| Product type | Three-phase electricity / energy meter | |
| Functionality level | Silver | |
| Connection type | Direct connected | |
| Number of phases | 3 | |
| Network configuration | 3-wire or 4-wire | |
| Base current | 5 A | |
| Maximum current | 65 A | |
| Rated phase-to-neutral voltage | 220–240 V AC | |
| Rated phase-to-phase voltage | 380–415 V AC | |
| Operating frequency | 50/60 Hz | |
| Active-energy accuracy | Class B / Class 1 | |
| Reactive-energy accuracy | Class 2 | |
| Energy measurement | Active and reactive, import and export | |
| Tariffs | Up to 4 | |
| Inputs | 2 | |
| Outputs | 2 | |
| Output functions | Energy pulse or alarm | |
| Alarm functions | Up to 25 | |
| Communication interface | RS-485 and infrared | |
| Communication protocols | Modbus RTU and ABB EQ Bus | |
| Display | Backlit digital display | |
| Protection rating | IP20 | |
| Operating temperature | -40 to +70 °C | |
| Width | 70 mm | |
| Depth | 65 mm | |
| DIN-rail width | 4 modules | |
| Mounting type | DIN rail | |
| Net weight | approx. 0.34 kg | |
| Approval | IEC approved; MID approved and verified | |
| Standards | IEC 62052-11; IEC 62053-21; IEC 62053-23; EN 50470-1; EN 50470-3 |
Frequently Asked Questions
What is the ABB B23 312-100 used for?
The ABB B23 312-100 is a three-phase direct-connected energy meter used to measure active and reactive electrical energy in commercial, residential and light-industrial installations while providing RS-485 connectivity for remote monitoring.
What is the maximum current of the ABB B23 312-100?
The B23 312-100 supports direct-connected loads up to 65 A, with a base current of 5 A.
Does the ABB B23 312-100 require current transformers?
No. The B23 312-100 is a direct-connected meter and can measure suitable three-phase loads up to 65 A without external current transformers.
What communication protocols does the ABB B23 312-100 support?
The B23 312-100 features an integrated RS-485 interface supporting Modbus RTU and ABB EQ Bus. It also includes an infrared communication interface for compatible accessories.
Is the ABB B23 312-100 MID approved?
Yes. The ABB B23 312-100 is MID approved and verified and provides Class B active-energy accuracy for compliant metering applications.
Trusted Connected Energy Metering from ABB
ABB B23 DIN-rail electricity meters combine accurate direct-connected three-phase measurement with active and reactive import/export metering, multi-tariff functionality and flexible communications. The B23 312-100 adds RS-485 Modbus RTU and EQ Bus connectivity for integration into professional energy-management, building-automation and sub-metering systems.
