Measurement Connections; Protection - ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521
10.2.2.
10.2.3.
152
Protection Relay
Technical Reference Manual, Standard Configurations

Measurement connections

The three-phase current transformers and residual voltage transformers are
connected to the connector X1.1 on the rear panel. The rated currents of the
measuring input are 1 A and 5 A. The rated values for the voltage are 100 V,
110 V, 115 V and 120 V.
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The technical data of the current transformers and the voltage transformer are set via
the Relay Setting Tool or the local HMI. The settings can be found in
Main menu\Configuration\Meas. devices\. Please refer to Technical
Reference Manual, General (1MRS 751108-MUM) for further information about
how to set the rated currents and voltage.

Protection

All the necessary settings for the protection functions can be set via the Relay
Setting Tool or the local HMI. The settings can be found in
Main menu\Protection\.
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REX 521