ABB REF611B Feeder Protection

Technical Overview

The ABB REF611B is a specialized feeder protection relay from the Relion® 611 series, specifically engineered for the protection, control, and monitoring of utility and industrial distribution networks. This module addresses the requirements of various grounding systems, offering both directional and non-directional overcurrent and earth-fault protection.

Detailed Technical Specifications

The ABB REF611B is built with the following industrial-grade specifications:

• Protection Scope: Dedicated feeder protection with support for directional or non-directional logic.

• Earth-Fault Protection: Selectable directional protection (for isolated or compensated networks) or non-directional (for directly or low-impedance earthed systems).

• Series: Relion® 611 Series (part of the 615 and 620 lineage).

• Communication: Native support for IEC 61850 Editions 1 and 2, including high-speed binary GOOSE messaging.

• Redundancy: Optional self-healing communication based on HSR (High-availability Seamless Redundancy) or PRP (Parallel Redundancy Protocol).

• Hardware Interface: Web-browser-based HMI for simplified configuration and an integrated I/O matrix with visual selection tools.

• Installation Design: Compact, withdrawable plug-in unit design to facilitate swift testing and maintenance.

• Input/Output: Flexible binary I/O mapping for interlocking and signaling.

• Diagnostics: Continuous self-supervision of hardware and software internal systems.

Application & Engineering Benefits

The REF611B is designed for maximum utility in both new-build substations and retrofit projects. Its compact footprint fits easily into space-constrained switchgear, while the withdrawable design allows for "hot" maintenance and testing without disturbing the primary wiring. By utilizing pre-configured application-specific solutions, engineers can deploy the relay for utility distribution or industrial power systems with minimal manual parameterization. Furthermore, the inclusion of GOOSE messaging enables the REF611B to participate in fast peer-to-peer communication schemes, such as busbar blocking or automated load shedding, without the need for extensive hardwiring between panels.