Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | ABB REF543KM129AAAB |
| Manufacturer | ABB |
| Product Category | Protection Relay (Feeder & Motor) |
| Rated Voltage | 110-240V AC/DC (24-48V DC optional) |
| Current Input | 1A or 5A (configurable) |
| Protection Functions | Overcurrent, Earth Fault, Thermal O/L |
| Communication Protocols | IEC 61850, Modbus RTU, Profibus DP |
| Operating Temperature | -25°C to +70°C |
| Protection Class | IP40 (front panel), IP20 (housing) |
| Mounting | DIN-rail or panel mounting |
| Certifications | CE, UL, IEC 60255 |
ABB REF543KM129AAAB
Product Introduction
The ABB REF543KM129AAAB is an advanced feeder and motor protection relay designed for industrial and utility applications. Part of ABB’s REF 54x series, this relay ensures reliable protection against electrical faults while offering seamless integration with modern automation systems.
Key features include adaptive protection algorithms, real-time monitoring, and cybersecurity compliance, making it ideal for critical power distribution networks. The REF543KM129AAAB is widely used in manufacturing plants, substations, and renewable energy systems.
Core Advantages & Technical Highlights
Advanced Protection Features
Overcurrent, short-circuit, and earth fault protection with adjustable tripping curves.
Thermal overload protection for motors (I²t algorithm).
Directional protection for grid-connected systems.
Smart Communication & Integration
IEC 61850-8-1 (GOOSE messaging) for fast fault isolation.
Modbus RTU & Profibus DP for SCADA/DCS connectivity.
Event recording & disturbance analysis for diagnostics.
User-Friendly Operation
LCD display with intuitive HMI for quick configuration.
Front USB port for firmware updates and settings backup.
Pre-configured protection curves for motors, transformers, and feeders.
Robust Design
Wide temperature range (-25°C to +70°C) for harsh environments.
Compact, space-saving design for panel or DIN-rail mounting.
Typical Application Scenarios
Industrial Power Distribution: Protects feeders and motors in manufacturing plants.
Renewable Energy Systems: Ensures grid stability in solar/wind farms.
Oil & Gas: Used in offshore platforms and refineries for fault protection.
Water/Wastewater: Protects pumps and compressors in treatment plants.
Mining: Reliable operation in high-vibration, dusty environments.
Related Model Recommendations
ABB REF615 – Compact feeder protection relay.
ABB REM615 – Motor protection relay with enhanced diagnostics.
ABB RET670 – Distance protection for transmission lines.
ABB REC670 – Generator protection relay.
ABB CM-UFD – Communication module for IEC 61850.
ABB REF543KM129AAAB
Installation & Maintenance
Installation Guidelines
Verify voltage/current ratings before wiring.
Use shielded cables for communication ports.
Ensure proper grounding to avoid EMI issues.
Maintenance Best Practices
Regularly test protection functions via relay self-test.
Monitor event logs for early fault detection.
Update firmware for cybersecurity enhancements.
Service & Warranty
3-year warranty covering defects.
ABB’s global support network (24/7 assistance).
Firmware updates & cybersecurity patches available.
