ABB 1MRK505137-BEN Application Line differential protection IED RED670

Application

The RED 670 IED is used for the protection, control and monitoring of overhead lines and cables in all types of networks. 

The IED can be used up to the highest voltage levels. 

It is suitable for the protection of heavily loaded lines and multi-terminal lines where the requirement for tripping is one-,two-, and/or three pole. 

The IED is also suitable for protection of cable feeders to generator block transformers.

The phase segregated current differential protection provides an excellent sensitivity for high resistive faults and gives a secure phase selection.

The availability of six stabilized current inputs allows use on multi-breaker arrangements in three

terminal applications or up to five terminal applications with single breaker arrangements.

Remote communication based on the IEEE C37.94 standard can be redundant when required for important installations. 

Charging current compensation allows high sensitivity also on long overhead lines and cables.

A full scheme distance protection is included as independent protection or as back-up at remote end communication failures. 

Eight channels for intertrip and binary signals are available in the communication between the IEDs.

The auto-reclose for single-, two- and/or three phase reclosing includes priority circuits for multi-breaker arrangements. 

It co-operates with the synchrocheck function with high-speed or delayed reclosing.

High set instantaneous phase and earth overcurrent, four step directional or un-directional delayed phase and earth overcurrent,

thermal overload and two step under and overvoltage functions are examples of the available functions allowing the

user to fulfill any application requirement.

The IED can also be provided with a full control and interlocking functionality including co-operation 

with the synchrocheck function to allow integration of the main or back-up control.

The advanced logic capability, where the user logic is prepared with a graphical tool, 

allows special applications such as automatic opening of disconnectors in multi-breaker arrangements, closingof breaker rings, load transfer logics etc. 

The graphical configuration tool ensures simple and fast testing and commissioning.

Serial data communication is via optical connections to ensure immunity against disturbances.

The wide application flexibility makes this product an excellent choice for both new installations and the refurbishment of existing installations.