Application - ABB REX 521 Technical Reference Manual, Standard Configurations

1MRS 751802-MUM
3.2.2.2.
Protection Relay
Technical Reference Manual, Standard Configurations

Application

The M02 standard configuration for the REX 521 is designed to be used in single
busbar systems using one circuit breaker for selective short-circuit protection, time-
overcurrent protection, directional earth-fault protection and automatic reclosing.
The configuration can be used in different types of networks such as of radial
isolated neutral networks, solidly earthed networks, resistant earthed networks and
resonant earthed networks.
For more detailed information about the configuration please refer to the application
examples of the standard configuration M02 on page 158.
REX 521
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