2CMA170536R1000 ABB A44 311-100 Three-Phase CT Connected Energy Meter

Why Choose the ABB A44 311-100 Three-Phase Energy Meter?

The ABB A44 311-100 is a professional transformer-connected three-phase electricity meter designed for accurate energy measurement in commercial, industrial and infrastructure installations. As part of the advanced ABB A44 DIN rail mounted meter range, it provides comprehensive monitoring for electrical systems using current and voltage transformer connections.

This Silver functionality-level meter measures active and reactive energy in both import and export directions and supports four energy tariffs. It also provides access to key electrical instrument values including active, reactive and apparent power, current, voltage, power factor and frequency, making it suitable for detailed energy monitoring and electrical-system analysis.

With a 1 A rated current and 6 A maximum current, a voltage range of 3 × 47–331 V AC and configurable transformer ratios, the A44 311-100 is designed for indirect three-phase metering. Two digital inputs and two digital outputs provide flexible tariff control, pulse and alarm functionality, while its compact 7-module DIN rail format enables straightforward integration into distribution boards and control panels.

Key Advantages

• Professional three-phase transformer-connected energy meter for indirect metering applications.
• Measures active and reactive energy in both import and export directions.
• Supports four energy tariffs for detailed consumption monitoring.
• 1 A rated current with 6 A maximum current for transformer-connected installations.
• Two digital inputs and two digital outputs provide flexible control and signalling.
• MID verified and IEC approved for dependable electrical energy measurement.

Key Features

• ABB A44 three-phase energy meter series.
• Silver functionality level with advanced energy and instrument-value measurement.
• Transformer-connected CT/VT metering.
• 1 A nominal current and 6 A maximum current.
• 3 × 47–331 V AC voltage range.
• Class B active-energy accuracy and Class 2 reactive-energy accuracy.
• Active and reactive energy measurement for import and export.
• Four tariffs with tariff control via digital inputs.
• Two digital inputs and two digital outputs.
• Infrared communication port for compatible communication accessories.
• Instrument values include power, current, voltage, power factor and frequency.
• Compact 7 DIN-module mounting format.

Accurate Three-Phase Energy Monitoring

Transformer-connected electricity meters such as the ABB A44 311-100 enable accurate energy monitoring in electrical systems where current and voltage transformers are used to scale primary electrical quantities to suitable metering levels. This makes the meter particularly useful in larger commercial and industrial distribution systems where direct-connected metering is not appropriate.

The A44 Silver series extends energy measurement with useful instrumentation and tariff functionality. Electrical values including active, reactive and apparent power, current, voltage, power factor and frequency can be monitored, while four tariffs and configurable digital inputs and outputs support more sophisticated energy-management applications.

Typical Applications

• Industrial three-phase energy monitoring.
• Commercial building electrical distribution systems.
• Switchboards and electrical control panels.
• CT/VT-connected energy metering installations.
• Multi-tariff energy monitoring systems.
• Building-management and energy-management installations.