ABB FEEDER PROTECTION AND CONTROL REF630 IEC NUMERICAL RELAY

Feeder protection and control REF630 IEC
Flexibility and high functionality for feeder protection and control applications
REF630 is a comprehensive feeder management relay for protection, control, measurement and supervision in utility and industrial power distribution systems, including radial, looped and meshed distribution networks, with or without distributed generation. REF630 is also ideal for feeder bay control.

Application
REF630 has been designed to be the main protection for overhead lines and cable feeders, in either isolated neutral, resistance-earthed, compensated or effectively earthed distribution networks. The comprehensive feeder
management relay offers four predefined configurations, intended for open/closed ring feeder applications, radial overhead/mixed line feeder applications, ring/meshed feeder applications and bus sectionalizers.

The earth-fault protection has been significantly extended, now including not only directional and non-directional, transient/intermittent, wattmetric and admittance-based, but also both harmonics and multifrequency admittance-based earth-fault protection. The new additions take the earth-fault protection to new heights, creating an extensive earth-fault protection portfolio. In addition, the sensitivity of the intermittent earth-fault protection has been
significantly improved and reactive power undervoltage protection added.

Scope

REF630 has been designed to be the main protection for overhead lines and cable feeders.

Product benefits

• Freely configurable functionality to meet application specific requirements
• Extensive functionality and scalable hardware for the most demanding applications
• All-in-one solution with integration of protection, control, monitoring and supervision in one relay
• Large integrated or detached HMI with user configurable push buttons, making it easy to use
• Extensive life cycle services

Product features

• Wide range of protection, control and supervision functionality for feeder protection
• Extensive earth-fault protection portfolio with unique multifrequency admittance-based protection for higher sensitivity and selectivity
• Advanced and fast fault location of short circuits and earth-faults
• 8 RTD/mA inputs and 4 mA outputs
• Supports native IEC 61850 Edition 1, including GOOSE messaging for less wiring and supervised communication
• Supports DNP3 (TCP/IP) and IEC 60870-5-103

Application
The REF615 provides main protection for overhead lines, cable feeders, and busbar systems of distribution substations. It can be applied for protection and control of grounded and ungrounded distribution systems. Flexible order coding allows for choosing current-only or current-and-voltage configurations to best fit your distribution feeder application needs.

Protection and control
The REF615 is the most powerful, advanced and simplest feeder protection relay in its class, perfectly offering time and instantaneous overcurrent, negative sequence overcurrent, phase discontinuity, breaker failure, thermal overload, and voltage metering and protection. The relay also features optional high impedance fault (HIZ) protection for grounded and ungrounded distribution systems. Also, the relay incorporates a flexible three-phase multi-shot auto-reclose function for automatic feeder restoration in temporary faults on overhead lines.
Enhanced with safety options, the relay offers a three-channel arc-fault detection system for supervision of the switchgear.

The REF615 also integrates basic control functionality, which facilitates the control of one circuit breaker via
the relay?s front panel human machine interface (HMI) or remote control system. To protect the relay from unauthorized access and to maintain the integrity of information, the relay has been provided with a fourlevel, role-based user authentication system, with individual passwords for the viewer, operator, engineer, and administrator levels. The access control system applies to the front panel HMI, embedded web browser based HMI, and the PCM600 relay setting and configuration tool.

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