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.
