Description

ABB REF611

ABB REF611 Numerical Relay is a dedicated feeder protection relay designed for the protection, control, measurement and supervision of utility substations and industrial power systems.
The feeder protection relay ABB REF611 can be supplied either with directional or non-directional overcurrent and earth-fault protection. Directional earth-fault protection is mainly used in isolated neutral or compensated networks, whereas the non-directional earth fault protection is intended for directly or low-impedance earthed neutral networks.

Scope

Feeder protection relay

Product benefits

• Pre-configured functions for feeder protection application
• The relays are delivered pre-configured and factory-tested to shorten engineering and commissioning time
• Self-healing communication based on HSR/PRP using an optional second Ethernet bus
• The compact design makes it suitable for both new and retrofit installations
• Withdrawable plug-in unit design for swift installation and testing

Product features

• Directional or non-directional overcurrent and earth-fault protection for feeders
• Powerful and user-friendly web-browser-based human machine interface (HMI) including input/output (I/O) matrix with visual selections
• Application-specific standard configurations resulting in a shorter relay setup and commissioning time
• Supports IEC 61850 Editions 1 and 2, including binary GOOSE messaging
• Pre-configured solutions for utility distribution and industrial applications

ABB REF611 Numerical relays

ABB Numerical relays are based on the use of microprocessors. A big difference between conventional electromechanical and static relays is how the relays are wired. Electromechanical and static relays have fixed wiring and the setting is manual. Numeric relays, on the other hand, are programmable relays where the characteristics and behavior can be programmed. Most numerical relays are also multifunctional.

Scope

• Modern protection relays
• Multifunctional protection

Product benefits

• Provide continuity of power to consuments
• Protection of network assets
• Protection against life-threatening electrical incidents

Product features

• Self-checking facility
• Low burden relays improve accuracy
• Fast fiber optical communication with substation LAN
• Adaptive relaying schemes
• Permit storage of historical data
• Time stamping

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