ABB REF543KM127AAAA Feeder Protection Relay

Description

The ABB REF543KM127AAAA is a multifunctional feeder protection relay from the REF543 series, designed for medium-voltage distribution systems. It integrates protection, control, measurement, and monitoring in a compact DIN-rail mountable unit.

Specifications

• Model: REF543KM127AAAA

• Series: REF543

• Function: Feeder protection, control, and monitoring

• Voltage Range: Up to 1000 V

• Protection Functions: Phase overcurrent, earth fault, zero-sequence overvoltage, over/undervoltage, thermal overload, breaker failure, auto-reclose

• Measurement Parameters: Phase current, line/phase voltage, zero-sequence current/voltage, frequency, power factor, active/reactive power, energy

• Control Functions: Breaker and disconnector control, synchronism check, interlock indication

• Communication Protocols: IEC 61850, IEC 60870-5-103, Profibus-DPV1, Modbus, DNP 3.0, SPA, LON

• Mounting: DIN rail

• Display: Large graphical LCD

• Operating Temperature: -20°C to +60°C

• Protection Class: IP20

Features

• Comprehensive Protection: Covers a wide range of fault scenarios for medium-voltage feeders

• Advanced Measurement: Real-time monitoring of electrical parameters and power quality

• Flexible Communication: Supports multiple protocols for seamless integration with SCADA/DCS systems

• PLC Integration: Built-in logic functions reduce wiring and support automation

• Compact Design: DIN-rail mountable for space-constrained installations

• User-Friendly Interface: Intuitive LCD display for local operation and diagnostics

• High Reliability: Engineered for demanding industrial environments

• Versatile Application: Suitable for motor and capacitor bank protection, substation automation, and industrial power systems