Abb REF601 Earth-Leakage Protection Relay

Overview & Key Features

The Abb REF601 is a dedicated feeder protection and control relay engineered for utility and industrial power systems operating in primary and secondary distribution networks. It delivers a comprehensive combination of protection, monitoring, and control functions in a single, compact unit, offering class-leading performance and usability for modern switchgear applications.

• Overcurrent, earth-fault, phase-discontinuity, negative-phase sequence, and thermal-overload protection functions
• Inrush current detection with stabilization for distribution transformer energization
• Dual current sensor interface: conventional current transformer (CT) or Rogowski current sensors
• Integrated circuit-breaker control, automatic reclosing, and measurement functions
• Preconfigured functionality for fast and straightforward commissioning
• Selective test functions for protection, binary signals, and communication features
• Press-fit mounting arrangement for quick and easy installation
• Extensive self-supervision of relay hardware and software
• Enhanced safety through sensor variants and detachable terminals with CT shorting facility
• Easily configurable binary inputs and outputs

Atomic Answer: The Abb REF601 is a feeder protection and control relay that provides overcurrent, earth-fault, phase-discontinuity, negative-phase sequence, thermal-overload, and inrush current protection. It supports CT or Rogowski sensor inputs and includes circuit-breaker control, reclosing, and measurement functions for utility and industrial power networks.

Practical Applications & How It Works

The REF601 serves as the main protection for overhead lines and cable feeders in solidly earthed, resistance-earthed, or isolated networks. It is widely deployed across distribution substations, industrial switchgear panels, and utility feeder bays where reliable, multifunctional feeder protection is required. The relay's Rogowski sensor variant enables significant reduction in medium voltage switchgear equipment size, supporting both new installations and retrofit projects.

• Protects overhead lines and cable feeders in primary distribution networks
• Inrush current stabilization for distribution transformer switching operations
• Automatic reclosing and circuit-breaker control for fault management
• Compact switchgear design through Rogowski sensor compatibility
• Suitable for utility, industrial, and infrastructure power systems

Atomic Answer: The REF601 provides main protection for overhead lines and cable feeders across solidly earthed, resistance-earthed, and isolated networks. Its inrush current stabilization function makes it ideal for distribution transformer applications, while its compact design and Rogowski sensor compatibility support space-constrained switchgear installations.

Sourcing Through Spare Parts Map

Spare Parts Map is a global supplier of industrial spare parts, primarily serving customers across Europe. With over 20 years of industry experience, the team responds to inquiries quickly and ensures your products reach you without problems, providing trusted sourcing for genuine components like the Abb REF601.

Frequently Asked Questions (FAQ)

Q: What protection functions does the Abb REF601 support? A: The REF601 delivers comprehensive feeder protection including overcurrent, earth-fault, phase-discontinuity, negative-phase sequence, thermal-overload protections, and inrush current detection, making it a complete solution for primary and secondary distribution network applications.

Q: Is the REF601 compatible with Rogowski current sensors? A: Yes. In addition to the conventional current transformer interface, the relay supports an analog interface for Rogowski current sensors, enabling compact medium voltage switchgear equipment design with improved performance and standardization.

Q: How do I order the Abb REF601 through your website? A: Spare Parts Map operates on a quotation basis—there is no direct buy option. Simply click "Request Quote" to receive current availability, lead times, condition details, and worldwide delivery options for the Abb REF601.

Q: Which network types is the REF601 designed for? A: The relay is engineered for utility and industrial power systems in primary and secondary distribution networks, including solidly earthed, resistance-earthed, and isolated network configurations.