Why Choose the ABB A44 352-100 Three-Phase Energy Meter?
The ABB A44 352-100 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 energy measurement with extensive instrumentation, alarm, tariff and communication capabilities.
The A44 352-100 measures active and reactive energy for both import and export, allowing consumption and generation to be recorded separately. Its large backlit pixel-oriented display provides clear access to energy and electrical instrumentation values, while integrated RS-485 communication with Modbus RTU and EQ Bus enables straightforward connection to compatible building management, energy monitoring and industrial automation systems.
Designed for three-phase transformer-connected measurement with a 1 A nominal CT secondary, the A44 352-100 is suitable for higher-current installations where indirect metering is required. It supports three- and four-wire systems, up to four tariffs, 25 configurable alarms and event logging, while two inputs and two outputs provide additional flexibility for pulse and alarm 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.
- RS-485 Modbus RTU and EQ Bus communication for integration with monitoring and automation systems.
- High active-energy accuracy of Class 0.5 / Class C for MID meters.
- Supports up to four tariffs for detailed energy allocation and monitoring.
- Two inputs and two outputs support pulse, alarm and other configurable functions.
- 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.
- Supports three-wire and four-wire systems.
- Active energy accuracy Class 0.5 / Class C for MID meters.
- Reactive energy accuracy Class 2.
- Active and reactive energy measurement with separate import, export and total registers.
- Resettable register for intermediate energy values.
- RS-485 interface supporting Modbus RTU and EQ Bus.
- Up to four energy tariffs.
- 25 possible alarms with event logging.
- Two inputs and two outputs for pulse, alarm and related functions.
- Large backlit pixel-oriented display for clear presentation of measured values.
- Wide voltage range for flexible three-phase system integration.
- 7 DIN-module format for DIN rail installation.
Accurate CT-Connected Energy Monitoring
The ABB A44 352-100 uses external current transformers to measure electrical systems where direct-connected metering is unsuitable. This makes the meter particularly useful for higher-current distribution circuits, switchboards and industrial installations while maintaining high active-energy measurement accuracy.
Its RS-485 interface supports Modbus RTU and EQ Bus communication, allowing measured energy and instrumentation data to be integrated into centralised energy management, building automation and industrial monitoring systems. Import and export registers, multiple tariffs, configurable alarms and event logging provide additional information for analysing consumption, generation and electrical operating conditions.
Typical Applications
- Industrial electrical distribution and energy monitoring.
- Commercial buildings and building management systems.
- 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.
- Modbus-based energy management and automation systems.
