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2CMA100156R1000 ABB B21 313-100 65 A Single-Phase Energy Meter M-Bus
ABB B21 313-100 single-phase direct-connected DIN-rail energy meter for circuits up to 65 A, with active and reactive import/export measurement, MID Class B accuracy, four-tariff capability and integrated M-Bus communication.
£174.62
Why Choose the ABB B21 313-100 Energy Meter?
The ABB B21 313-100 is a compact single-phase DIN-rail electricity meter designed for direct-connected electrical installations up to 65 A. Part of ABB's DIN Rail Mounted Meters range, it combines accurate active and reactive energy measurement with integrated M-Bus communication for residential, commercial, submetering and building energy-management applications.
Designed for 220–240 V AC single-phase systems, the B21 313-100 measures active and reactive energy in both import and export directions. It supports up to four tariffs, provides two digital inputs and two digital outputs, and offers Class B active-energy accuracy for MID applications together with Class 2 reactive-energy accuracy.
Integrated M-Bus communication enables the meter to exchange measurement data with compatible remote metering and building management systems. Direct measurement up to 65 A eliminates the need for external current transformers in suitable circuits, while its compact two-module format makes efficient use of DIN-rail space.
Key Advantages
- Direct-connected measurement up to 65 A without external current transformers.
- Designed for single-phase 220–240 V AC electrical systems.
- Measures both active and reactive energy.
- Supports import and export energy measurement for bidirectional monitoring.
- Integrated M-Bus communication for remote meter reading and system integration.
- MID Class B / IEC Class 1 active-energy accuracy.
- Class 2 reactive-energy accuracy.
- Supports up to four tariffs for flexible energy accounting.
- Two digital inputs and two digital outputs provide flexible control, pulse and alarm functionality.
- Compact two-module DIN-rail construction simplifies installation in distribution boards.
Key Features
- ABB B21 series electricity meter.
- Single-phase direct-connected measurement.
- Maximum direct-connected current of 65 A.
- 220–240 V AC nominal system voltage.
- Active and reactive energy measurement.
- Import and export energy measurement.
- Support for up to four tariffs.
- Integrated M-Bus interface.
- Two digital inputs and two digital outputs.
- Pulse and alarm functionality.
- Instrumentation values for detailed electrical monitoring.
- Infrared communication port for compatible ABB accessories.
- MID approved and verified.
- IEC approved.
- Compact two-module DIN-rail format.
Advanced Energy Monitoring with M-Bus Communication
The ABB B21 313-100 combines direct-connected energy measurement with integrated digital communication in a compact DIN-rail enclosure. It measures both active and reactive energy in import and export directions, while support for up to four tariffs enables detailed allocation of electricity consumption across different tariff periods or applications.
The integrated M-Bus interface allows measurement information to be transmitted to compatible remote reading, building management and energy-monitoring systems. Combined with two digital inputs, two digital outputs and an infrared communication port, the B21 313-100 provides a flexible metering solution for installations requiring both local measurement and centralised access to energy data.
Typical Applications
- Residential energy monitoring and submetering.
- Commercial building energy monitoring.
- Tenant and departmental energy metering.
- Single-phase distribution board monitoring.
- Building management systems using M-Bus communication.
- Centralised automatic meter-reading systems.
- Import and export energy monitoring.
- Multi-tariff electricity monitoring.
- Energy efficiency and consumption analysis.
- Direct-connected circuits requiring measurement up to 65 A.
Technical Specifications
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| Measurement Connection Type | CT connection | |
|---|---|---|
| MID Approval | Yes | |
| Device Type | Energy meter | |
| Series | B21 | |
| Product group | DIN Rail Mounted Meters | |
| ABB order code | 2CMA100156R1000 | |
| EAN | 7392696001632 | |
| Product type | Digital electricity / energy meter | |
| Phase configuration | Single phase | |
| Number of poles | 1 | |
| Connection | Direct connected | |
| Maximum direct current | 65 A | |
| Nominal current | 5 A | |
| Nominal system voltage | 220–240 V AC | |
| Voltage range | 176–276 V AC | |
| Active energy accuracy | Class B (MID) / Class 1 | |
| Reactive energy accuracy | Class 2 | |
| Energy measurement | Active and reactive | |
| Energy direction | Import and export | |
| Tariffs | Up to 4 | |
| Communication | M-Bus | |
| Additional communication | Infrared port | |
| Digital inputs | 2 | |
| Digital outputs | 2 | |
| Dimensions (W × H × D) | 35 × 97 × 65 mm | |
| Mounting type | DIN rail | |
| Module width | 2 modules | |
| Approvals | MID approved and verified; IEC approved | |
| Weight | approx. 0.15 kg |
Frequently Asked Questions
What is the ABB B21 313-100 used for?
The ABB B21 313-100 is a single-phase DIN-rail energy meter used to measure active and reactive electrical energy in direct-connected circuits up to 65 A. It is suitable for residential, commercial, submetering and building energy-management applications.
Does the ABB B21 313-100 require current transformers?
No. The B21 313-100 is direct connected up to 65 A, so external current transformers are not required when the measured circuit is within the meter's specified direct-connection range.
What communication interface does the B21 313-100 use?
The ABB B21 313-100 features an integrated M-Bus communication interface, allowing energy and instrumentation data to be accessed by compatible remote metering and building management systems. It also incorporates an infrared communication port.
Can the ABB B21 313-100 measure imported and exported energy?
Yes. The B21 313-100 supports bidirectional active and reactive energy measurement, allowing both imported and exported electrical energy to be monitored.
Is the ABB B21 313-100 MID approved?
Yes. The B21 313-100 is MID approved and verified, with Class B active-energy accuracy. It also provides IEC Class 1 active-energy accuracy and Class 2 reactive-energy accuracy.
Trusted ABB Energy Metering
ABB B-series DIN-rail energy meters combine compact installation, accurate electrical measurement and flexible communication capabilities, providing a practical platform for energy monitoring, submetering and integration with modern building energy-management systems.
