Application - ABB REX 521 Technical Reference Manual, Standard Configurations

1MRS 751802-MUM
3.3.5.2.
Protection Relay
Technical Reference Manual, Standard Configurations

Application

The H05 standard configuration for the REX 521 is designed to be used in single
busbar systems using one circuit breaker for selective non-directional short-circuit
protection, non-directional time-overcurrent protection, non-directional earth-fault
protection, overvoltage protection, undervoltage protection and residual overvoltage
protection.
For more detailed information about the configuration please refer to the application
example of the standard configuration H05 on page 188.
REX 521
47