Description
Product Introduction
ABB REF610C55HCNR is a feeder protection relay from the Relion 610 platform used in medium-voltage distribution networks and industrial switchgear systems. The unit combines protection, measurement, control supervision, and event recording in a compact plug-in format designed for fast maintenance and replacement.
ABB REF610C55HCNR is commonly deployed in feeder outgoing panels, transformer feeders, and industrial distribution boards. In real commissioning environments, stability depends more on CT wiring correctness, trip circuit integrity, and communication configuration than on the relay hardware itself.
Frequently Asked Questions
Q: Is REF610C55HCNR hot-swappable in MV switchgear?
A: Mechanically it is plug-in, but electrically no. Auxiliary DC (typically 110–220 V DC) must be isolated before removal to avoid trip circuit energization risks.
Q: Is this relay still supported by ABB?
A: It is a legacy platform. ABB support is mainly spare parts and documentation. New designs typically move to Relion 615/620 series.
Q: Will I lose settings when replacing the unit?
A: Yes unless backed up. Always export parameters, logic, event logs, and record CT/VT ratios before removal.
Q: Does it support IEC 61850?
A: Some variants do, but many installations rely on Modbus RTU or IEC 60870-5-103. IEC 61850 support depends on hardware optioning.
Q: What is the most common commissioning issue?
A: CT secondary mismatch (1 A vs 5 A), incorrect address mapping, and missing communication termination resistors.
