REF615E-C | ABB Feeder Protection Relay

REF615 is a native IEC 61850 feeder protection relay for selective short-circuit,overcurrent and earth-fault protection. It is applicable to all types of radial isolatedneutral networks, resistant earthed networks and compensated networks. REF615 ispart of a product family that will cover main protection applications for utility andindustry customers.The IED features draw-out-type design, compact size and ease of use. Depending onthe IED variant, the protection functions may include:• Three-phase non-directional overcurrent protection, 4 stages• Double earth-fault protection (cross-country earth-fault protection)• Non-directional earth-fault, 3 stages• Non-directional sensitive earth-fault• Directional earth-fault protection, 3 stages• Transient/intermittent earth-fault protection• Negative-phase-sequence protection, 2 stages• Phase discontinuity• Three-phase transformer inrush detector• Three-phase thermal overload, lines and cables• Circuit breaker failure protection• Electrically latched lockout relay