Description
Product Introduction
ABB REF615 is a medium-voltage feeder protection relay from the Relion 615 series, designed for industrial and utility distribution systems. The relay combines protection, measurement, breaker control, automation logic, and communication interfaces into a compact, plug-in form factor suitable for MV switchgear.
ABB REF615 supports modern SCADA protocols including IEC 60870-5-103, Modbus RTU, and optional IEC 61850, making it suitable for new installations and retrofit applications. Practical deployment requires careful verification of CT/VT ratios, communication configuration, and firmware alignment with existing systems to avoid commissioning delays.
Frequently Asked Questions
Q: Is REF615 hot-swappable?
A: Mechanically it is plug-in, but electrically no. Always isolate auxiliary supply before replacement.
Q: Is this relay still supported?
A: Yes. The Relion 615 series is actively supported by ABB, with spare parts, firmware updates, and technical documentation available.
Q: Will configuration settings be lost during replacement?
A: Yes, unless backed up. Export protection parameters, event logs, and communication settings before removal.
Q: What is the most common installation mistake?
A: Incorrect CT secondary rating selection, miswired trip circuits, or missing bus termination resistors for communication networks.
