ABB REF620 IEC Feeder Protection and Measurement Control Unit

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 minimize 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 specialized ones, for example for line differential protection.

Main advantages

Devices can be used for a wide range of applications

Ranging from simple protection devices as backup protection to specialized protection devices

Well-established and modernized technology

Arc detection as an option

REF620 as a dedicated feeder protection device for the protection, control, measurement and monitoring of public and industrial power distribution systems.

REF620 IEC feeder protection and measurement and control device, as a dedicated feeder protection device, is specially designed for the protection, control, measurement and monitoring of public and industrial grids, including radial, ring and mesh grids.

The REF620 provides feeder overcurrent and earth fault protection that can be applied to both ungrounded neutral networks and resistance or impedance neutral grounded networks.

In addition, utilizing the unit's advanced station-to-station communication capabilities, the REF620 can also be used for ring mesh distribution network or radial network protection.

The REF620 IEC Feeder Protection and Measurement Control Unit is available in single and dual busbar configurations, with one or two circuit breakers and multiple switchgear configurations for each busbar configuration.

The unit supports a large number of manual and motorized disconnect and ground switches. The number of available I/Os can be increased as required by ABB's RIO600 remote I/O unit.

The REF620 IEC Feeder Protection and Control Unit features support for the IEC61850 communication standard for substations, covering both vertical and horizontal communications.

It includes GOOSE telegrams with switching and analog signals, and constant value adjustment based on IEC 61850-8-1.

The REF620 also supports DNP3. IEC 60870-5-103 and Modbus® protocols.

The REF620 provides an optional Ethernet port for non-delayed redundant Ethernet or a ring self-healing RSTP communication in the event of a communication failure via PRP or HSR protocols.

This solution eliminates the effects of a single point of failure and improves communication reliability. The solution can be applied to Ethernet based IEC 61850. Modbus® and DNP3 protocols