ABB REF545KB133AAAA – High-Performance Protective Relay for Power Systems
The ABB REF545KB133AAAA is a precision-engineered protective relay designed for critical fault detection in electrical power systems. This advanced relay delivers reliable protection against short-circuits, overloads, and phase unbalance in industrial power networks, ensuring operational continuity for substations, manufacturing facilities, and energy distribution systems.
Technical Specifications
| Manufacturer | ABB |
| Model | REF545KB133AAAA |
| Module Type | Relay Protection Module |
| Rated Current | 500 A |
| Protection Functions | Short-circuit, Overload, Phase Unbalance |
| Frequency Range | 50/60 Hz |
| Operating Voltage | 220-240 VAC |
| IP Rating | IP20 |
| Dimensions (HxWxD) | 145 x 145 x 80 mm |
| Weight | 1.5 kg |
Application & Compatibility
This relay excels in substation automation, industrial power management, and critical infrastructure protection. It features Modbus and Ethernet/IP communication interfaces for seamless integration with ABB’s Relion® protection series and third-party control systems. Commonly paired with REF 54_ series relays and ABB’s SSC600 control units for comprehensive network protection.
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