2CMA170538R1000 ABB A44 353-100 Three-Phase CT-Connected M-Bus Energy Meter 1 A

Why Choose the ABB A44 353-100 Three-Phase Energy Meter?

The ABB A44 353-100 is an advanced three-phase current-transformer-connected DIN rail energy meter designed for accurate measurement and monitoring of electrical energy in industrial, commercial and building installations. As part of the ABB A44 EQ meter series, this Silver-functionality meter combines high-accuracy active and reactive energy measurement with instrumentation, tariff, alarm and communication capabilities.

The A44 353-100 measures active and reactive energy for both import and export, with separate registers and a total energy register. Its large backlit pixel-oriented display provides clear access to energy and electrical instrumentation values, while integrated wired M-Bus communication enables remote meter reading and integration with compatible building management and energy monitoring systems.

Designed for three-phase transformer-connected measurement with a 1 A nominal CT secondary, the A44 353-100 is suitable for higher-current installations where indirect metering is required. It supports three- and four-wire systems across a wide voltage range, provides up to four tariffs and includes two inputs and two outputs for pulse, alarm and related functions.

Key Advantages

• Advanced three-phase CT-connected energy meter for industrial and commercial applications.
• 1 A nominal current-transformer input for indirect measurement of higher-current electrical systems.
• Measures active and reactive energy for import and export.
• Integrated wired M-Bus communication for remote meter reading and energy management integration.
• High active-energy accuracy of Class 0.5S / Class C for MID meters.
• Supports up to four tariffs for energy allocation and monitoring.
• Two inputs and two outputs provide flexible pulse and alarm functionality.
• IEC approved, MID approved and verified for dependable energy measurement.

Key Features

• ABB A44 EQ meter series with Silver functionality.
• Three-phase transformer-connected energy metering.
• 1 A nominal CT secondary input with a maximum meter current of 6 A.
• Suitable for three-wire and four-wire electrical systems.
• Active energy accuracy Class 0.5S / Class C for MID meters.
• Reactive energy accuracy Class 2.
• Active and reactive energy measurement with import, export and total registers.
• Resettable register for intermediate energy values.
• Integrated wired M-Bus communication.
• Infrared communication capability.
• Up to four energy tariffs.
• Instrumentation values with 25 possible alarms and event logs.
• Two inputs and two outputs for pulse or alarm functions.
• Large backlit pixel-oriented display for clear presentation of measured values.
• 7 DIN-module format for DIN rail installation.

Accurate CT-Connected Energy Monitoring with M-Bus

The ABB A44 353-100 uses external current transformers to provide accurate electrical energy measurement on circuits where direct-connected metering is unsuitable. This makes it particularly useful for higher-current distribution systems, switchboards and industrial installations while maintaining Class C MID active-energy measurement accuracy.

Integrated M-Bus communication enables energy data to be collected remotely by compatible metering and building management systems. Combined with import and export registers, multiple tariffs, instrumentation values, configurable alarms and event logging, the A44 353-100 provides a flexible platform for sub-metering, energy management and electrical distribution monitoring.

Typical Applications

• Industrial electrical distribution and energy monitoring.
• Commercial buildings and building management systems.
• M-Bus remote meter-reading networks.
• CT-connected switchboards and distribution panels.
• Higher-current electrical circuits requiring indirect metering.
• Energy sub-metering and consumption allocation.
• Production facilities and manufacturing plants.
• Multi-tariff energy monitoring.
• Import and export energy measurement.