Description
The REF615 is a dedicated feeder relay perfectly aligned for the protection, control, measurement, and supervision of utility substations and industrial power systems. REF615 is a member of ABB’s Relion® family and a part of its 615 protection and control product series. The 615 series ANSI are characterized by their compactness and withdrawable design. Engineered from the ground up, the 615 series has been designed to unleash the full potential of the IEC 61850 standard for communication and interoperability of substation automation devices.
Scope • Feeder protection for overhead lines, cable feeders, and busbar systems of distribution substations Key benefits • Maximized capital by keeping assets working longer with designs that require less equipment and space • Enhanced safety by reducing hazards with safety-conscious designs • Increased reliability by maintaining vital operations with steady, high-quality power every minute of every day • Reduced operating costs with effective energy management and maintenance strategies • More flexible system upgrades without rewiring or changing components • Ease of integration with non-proprietary IEC 61850 communications Key features • Drawout design • Underground, overhead cable fault detection (CFD) • High-impedance (HIZ) fault detection • Arc flash detection (AFD) • Ring-lug terminals for all inputs and outputs • Large, easy-to-read LCD
REF615 supports the new IEC 61850 standard for inter-device communication in substations. The relayalso supports the industry standard DNP3.0 and Modbus® protocols. The implementation of the IEC 61850substation communication standard in REF615 encompasses both vertical and horizontal communication, including GOOSE messaging and parameter set-ting according to IEC 61850-8-1. The substationconfiguration language enables the use of engineering tools for automated configuration, commissioning, and maintenance of substationdevices.
For continuous knowledge of the operational availability of the REF615 features, a comprehensive setof monitoring functions to supervise the relayhealth, the trip circuit, and the circuit breakerhealth is included. The breaker monitoring can include checking the wear and tear of the circuitbreaker, the spring charging time of the breakeroperating mechanism and the gas pressure of thebreaker chambers. The relay also monitors thebreaker travel time and the number of circuitbreaker operations to provide basic informationfor scheduling breaker maintenance.
The IEC 61850 implementation in REF615 also includes fast peer-to-peer communication, over thesubstation bus. Use GOOSE communication between REF615 IEDs of the incoming and outgoingfeeders of a substation cooperate to form a stable,reliable, and high-speed busbar protection system.The cost-effective GOOSE-based busbar protection is obtained by configuring the IEDs and theoperational availability of the protection is assuredby continuous supervision of the protection IEDsand their GOOSE messaging over the station bus.No separate hard-wiring is needed for the horizontal communication between the switchgearcubicles.
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