Description
Product Introduction
ABB REF610C11HCNR01 is a medium-voltage feeder protection relay from the Relion 610 series used in industrial distribution systems and utility substations. The relay combines protection, measurement, supervision, and event recording functions within a compact plug-in architecture designed for MV switchgear applications.
This unit is commonly installed in feeder panels requiring dependable overcurrent and earth fault protection with serial SCADA communication. In retrofit projects, engineers usually spend more time resolving CT scaling, communication addressing, and firmware revision mismatches than replacing the actual hardware.
Frequently Asked Questions
Q: Does this relay support hot-swapping?
A: Mechanically, the plug-in construction simplifies maintenance. Electrically, no experienced protection engineer swaps relays live. Always isolate auxiliary supply before removal.
Q: Is REF610C11HCNR01 obsolete?
A: The Relion 610 family is mature legacy hardware. ABB Relion 615 and 620 series relays are the common migration path for modernization projects.
Q: Will replacing the relay erase protection settings?
A: Yes unless backed up first. Export parameters, disturbance records, and communication settings before shutdown. Record firmware revision as well.
Q: What is the most common commissioning mistake?
A: Honestly, incorrect CT secondary selection. Many older substations still use 1 A CT circuits, while replacement engineers often assume 5 A by default.
Q: Does it support IEC 61850?
A: Standard REF610 variants mainly use Modbus RTU or IEC 60870-5-103. IEC 61850 support is limited compared with newer Relion platforms.
Q: Are these units factory-new or refurbished?
A: Most available inventory is new surplus OEM stock from cancelled projects or strategic spare inventories. Used field removals also exist in the secondary market.
