Relay protection for overhead lines and cable feeders in distribution networks for different application areas

Feeder protection, precisely the protection of overhead lines and cables, is the most commonly used type of protection.

The protection must ensure that the grid continues to supply power. In the event of a fault, it must be prevented from propagating to the normal part of the network.

Relay protection must also minimise damage to cables and other connected equipment from faults and ensure the safety of everyone involved.

ABB offers a wide range of feeder protection. There is a wide range of multifunctional relays for different application areas.

There are some for general feeder protection (overcurrent protection) and backup protection, and some more specialised ones, e.g. for line differential protection.

Main advantages

• Devices can be used for a wide range of applications
• Ranging from simple protection devices as back-up protection to specialised protection devices
• Well-established and modern technology
• Arc detection as an option
• The REF620 is a member of the 620 Protection, Measurement and Control product family within the ABB Relion® product family.

  Key benefits

  • Protection, control, monitoring and management integrated in a single relay provides a compact and versatile solution for public and industrial power distribution systems
  • Wide range of protection and control functions, either with sensors or conventional CTs and PTs
  • Functional scalability and wide range of applications allow users to easily customise configuration applications to meet specific requirements
  • Pluggable design for quick installation and testing
  • Large LCD screen with single-line graphic display, accessible locally or via an easy-to-connect and navigate HMI
  • Thoughtful product lifecycle service

  Key Features

  • Wide range of protection and control functions for incoming or outgoing applications
  • Multi-frequency conductive earth protection package with high sensitivity and selectivity
  • Advanced and fast short-circuit and earth-fault location functions
  • Several optional function packages – for distributed generation, capacitors, basic motor and arc-light protection
  • Supports IEC61850 Version 1 and 2, including redundant HSR and PRP, GOOSE and IEC61850-9-2
  • Supports Modbus, DNP3, IEC 60870-5-103 communication protocols and different time synchronisation methods, including IEEE 1588 v2 precision time protocols