REB611 is a member of ABB’s Relion® product family and part

of the 611 protection and control product series. The 611 series

relays are characterized by their compactness and withdrawable-unit design.

The 611 series offers simplified yet powerful functionality for

most applications. Once the application-specific parameter set

has been entered, the installed protection relay is ready to be

put into service. The further addition of communication

functionality and interoperability between substation

automation devices offered by the IEC 61850 standard adds

flexibility and value to end users as well as electrical system manufacturers.

In addition, the protection relay can be utilized

in restricted earth-fault and residual earth-fault applications for

the protection of generators, motors, transformers and reactors.