ABB REF-543AM129AAAA Protection Relay Module

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1. Product Overview

The ABB REF-543AM129AAAA Protection Relay Module is a high-reliability electrical protection device used in power systems to protect against overcurrent, undervoltage, overvoltage, short circuits, and other faults. The module uses advanced digital control technology to monitor electrical parameters in real-time and execute fast protection actions, ensuring safe operation of equipment and systems. REF-543AM129AAAA is suitable for distribution networks, substations, and industrial automation power systems.

2. Technical Specifications

• Model: REF-543AM129AAAA

• Product Type: Protection Relay Module

• Rated Voltage: AC 110/220 V or DC 24/48 V (depending on model)

• Rated Current: 0.1 A – 5 A

• Protection Functions: Overcurrent, short-circuit, overvoltage, undervoltage, phase sequence, loss of voltage, differential protection, etc.

• Output Type: Relay contact output

• Response Time: ≤ 20 ms

• Operating Temperature: –20 ℃ to +70 ℃

• Degree of Protection: IP20 (cabinet mounted)

• Mounting: DIN rail or panel mount

• Communication Interface: Modbus / Profibus / IEC 61850 (optional)

• Standards: CE / IEC 60255 / UL

3. Advantages and Features

1. High-Reliability Protection
   Digital control technology provides fast and accurate fault protection.

2. Multi-Function Protection
   Supports overcurrent, short-circuit, undervoltage, overvoltage, and differential protection.

3. Fast Response
   Short response time enables instantaneous circuit interruption to protect equipment.

4. Modular Design
   DIN rail or panel mounting for easy maintenance and system integration.

5. Intelligent Monitoring and Communication
   Optional communication interfaces enable remote monitoring, data acquisition, and integration with automation systems.

4. Applications

• Power distribution network protection and monitoring

• Industrial plant and production line power system protection

• Substation relay protection

• Power plant and distribution equipment monitoring

• Critical power protection in automation control systems

5. Installation and Usage Notes

1. Ensure the relay module model and rated voltage match the system before installation.

2. Perform wiring and installation with power disconnected.

3. Avoid direct installation in humid, corrosive, or strong electromagnetic interference environments; provide protection if necessary.

4. Regularly check relay status, terminal connections, and communication interfaces to ensure long-term stable operation.

5. Do not modify or disassemble the module to prevent affecting protection functions.