Description
Key Technical Specifications
- Product Type: Feeder protection and control intelligent electronic device (IED)
- Application: Medium-voltage distribution networks (feeders, motors, capacitor banks)
- Protection Functions: Overcurrent, earth fault, directional protection, undervoltage (configurable scheme dependent)
- Control Functions: Breaker control, disconnector interlocking, local/remote switching logic
- Automation Logic: Built-in PLC-style programmable functions for substation sequencing
- CT Inputs: 1 A / 5 A secondary inputs (variant dependent)
- VT Inputs: 100 V / 110 V nominal (external VT required)
- Binary Inputs: Fully programmable digital inputs (project dependent configuration)
- Binary Outputs: Trip, close, alarm, interlock outputs (relay-card dependent)
- Measurement Functions: Current, voltage, frequency, power, energy metering
- Communication Protocols: SPA, LON, IEC 60870-5-103, Modbus, Profibus, IEC 61850 (via options/gateway)
- Event Recording: Fault recording, sequence-of-events (SOE) logging
- Mounting: Panel-mounted switchgear cubicle installation
- Operating Environment: Industrial substation duty, indoor MV panels
Product Introduction
ABB REF543CM129AAAA is a medium-voltage feeder protection and bay control relay from the REF54x platform used in distribution substations and industrial switchgear systems. It integrates protection algorithms, breaker control, measurement, and communication into a single feeder terminal architecture.
ABB REF543CM129AAAA is typically deployed in feeder bays, motor feeders, and capacitor bank protection schemes where programmable logic and multi-protocol SCADA integration are required. In field practice, reliability depends more on CT/VT wiring accuracy, firmware consistency, and configuration integrity than on the relay hardware itself.
