ABB REF610 Feeder Protection Relay

Description The REF610 relay is engineered to provide comprehensive protection for feeders in distribution substations. It is also suitable as backup protection for motors, transformers, and generators in utility and industrial applications. Its compact, plug-in design facilitates easy installation and maintenance. Specifications Protection Functions: Three-phase overcurrent protection (low-set, high-set, and instantaneous stages). Non-directional earth fault protection (low-set and high-set stages). Phase discontinuity and thermal overload protection. Circuit-breaker failure protection. Arc protection with two lens sensors. Measurement Capabilities: Residual current and three-phase current measurement. Disturbance and event recording. Communication Protocols:IEC 61850, IEC 60870-5-103, DNP3, Modbus, Profibus, and SPA. Operating Temperature: -25°C to +55°C. Power Supply: 24–250 V DC or 110–240 V AC. Mounting: DIN rail or flush mounting. Certifications: Complies with interna