ABB REF 545

Product Overview
The ABB REF 545 is a medium voltage feeder terminal protection relay developed for substation automation, built to comply with IEC, CE and power industry certification standards. Built for medium voltage feeder protection, substation logic automation, electrical parameter metering, this robust panel-mounted relay withstands cabinet temperature fluctuation, dust and mechanical vibration, delivers stable 24/7 continuous operation, and serves as core power protection hardware for power distribution substations, industrial MV switchgear, marine medium voltage power systems and capacitor bank control.

Featuring multi-functional protection algorithm modules, built-in programmable PLC logic, multi-protocol communication interfaces, local HMI panel and status LED indicators. It supports flush panel mounting inside medium voltage switchgear cabinets, adapting to limited installation space in power substation control rooms and industrial power distribution panels. The modular assembly allows separate replacement of HMI, I/O and communication modules without full substation shutdown, greatly reducing system downtime for service. Equipped with multi-stage overcurrent protection, fault event recording function & embedded self-diagnostic routine, mature hardware structure detects grid faults rapidly and guarantees dependable power system protection performance during continuous duty.

For dependable medium voltage feeder protection, substation logic automation, electrical parameter metering, REF 545 implements overcurrent, earth fault and voltage protection for medium voltage feeders, executes custom sequence logic via internal PLC for substation automation, and measures voltage, current, power and energy data for power management. Reliable medium voltage feeder protection, substation logic automation, electrical parameter metering, premium industrial-grade electronic components provide excellent long-term operational stability, extending service life in harsh substation and industrial power cabinet working environments. Practical multi-stage overcurrent protection, fault event recording function & embedded self-diagnostic routine, maintenance technicians can review fault records and configure protection setpoints during routine substation equipment inspection and overhaul.

During continuous medium voltage feeder protection, substation logic automation, electrical parameter metering, this feeder terminal relay is fully compatible with ABB substation automation platforms, SCADA systems and medium voltage switchgear units. Stable medium voltage feeder protection, substation logic automation, electrical parameter metering, mature ABB REF series relay technology with easy spare parts replacement and convenient after-sales maintenance. Robust multi-stage overcurrent protection, fault event recording function & embedded self-diagnostic routine, simplifies switchgear cabinet layout and reduces installation workload for substation retrofitting and medium voltage protection system overhaul projects.

Technical Specifications Brand: ABB Model: REF 545 Product Type: Medium Voltage Feeder Terminal Protection Relay Mounting: Switchgear flush panel mount Power Supply: 80~260V AC/DC Communication: SPA bus, LON bus, IEC 60870-5-103, Modbus, optional IEC61850 Function: Feeder protection, motor & capacitor bank protection, power metering, breaker control, programmable PLC logic, fault recording, self-diagnosis Protection: Vibration resistance, wide operating temperature, EMC anti-interference, IEC certified Application Field: Power distribution substation, industrial medium voltage switchgear, marine MV power system, reactive power compensation capacitor bank, protection relay spare replacement

Key Features Designed for medium voltage feeder protection, substation logic automation, electrical parameter metering, panel-mounted medium voltage feeder terminal relay for substation automation and power distribution protection application. Adopts integrated multi-protection function, embedded programmable PLC, rich communication protocols & local HMI operation panel, switchgear panel installation simplifies layout and reduces wiring work. Equipped with multi-stage overcurrent protection, fault event recording function & embedded self-diagnostic routine, mounting adapts limited MV switchgear cabinet space. Modular structure allows module replacement without full power system shutdown, cutting equipment downtime. Premium rugged industrial electronic components resist mechanical shock and temperature variation, stable performance under variable power station operating conditions and long-hour operation. Spare ABB REF 545 relay for retrofitting and overhaul of medium voltage feeder protection and substation automation systems.

Application Scope Power protection unit: feeder terminal relay performing medium voltage feeder protection, substation logic automation, electrical parameter metering, protects medium voltage distribution feeders and provides automation logic for substation operators. Compact flush panel installation: integrated protection, metering and control circuit, multi binary input/output terminals and local HMI, sturdy metal housing saves switchgear installation space. Low-maintenance continuous operation: flexible protection setting groups, fault history storage & embedded self-diagnostic routine, component replacement without dismantling the whole relay assembly. Spare-part maintenance: replacement ABB REF 545 relay for overhaul and hardware renewal of medium voltage substation protection and automation systems.

Package & Delivery Each ABB REF 545 feeder terminal relay is packed with anti-static wrapping and shockproof export carton for power protection spare parts shipment. Complete delivery includes REF 545 main relay unit; installation manual and maintenance guide are provided for reference. Matching communication adapters, wiring terminals and mounting accessories are available as optional spare parts.