The digital relay type XRI1-IR as time overcurrent protection has been designed for the use in electrical machines, lines and grids. The protective functions of XRI1-IR that are implemented in only one device are summarized as follows: Independent (Definite) time overcurrent relay. Inverse time overcurrent relay with selectable characteristics. Integrated determination of fault direction for application to doubly infeeded lines or meshed systems. Furthermore, the relay XRI1-IR can be employed as a back-up protection for distance and differential protective relays.
FEATURES & FUNCTIONALITY
The digital relay type XRI1-IR as time overcurrent protection has been designed for the use in electrical machines, lines and grids. The protective functions of XRI1-IR that are implemented in only one device are summarized as follows:
Independent (Definite) time overcurrent relay.
Inverse time overcurrent relay with selectable characteristics.
Integrated determination of fault direction for application to doubly infeeded lines or meshed systems.
Furthermore, the relay XRI1-IR can be employed as a back-up protection for distance and differential protective relays.