Standard Functions; Switchgroups; Selectors - ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521
7.6.
7.6.1.
7.6.2.
100
Protection Relay
Technical Reference Manual, Standard Configurations
Voltage waveform distortion measurement, PQ 3Unf
Triggering mode
Statistics
Observation times for statistics
Percentile setting
Percentiles for each harmonic and THD
Five fixed percentiles (1,5,50,95,99) for one
selectable harmonic or THD
Maximum values for each harmonic and
THD
Recorded data

Standard functions

Switchgroups

The switchgroups are used for changing the functionality of the standard
configuration via the HMI or using the Relay Setting Tool.

Selectors

The selectors are used for routing signals and connecting inputs. Every digital input
can be connected to an input signal (e.g. Blocking 1, Master trip) via a selector.
Likewise, an output signal can be connected to an output relay (Trip1, Alarm 1) via
a selector.
Single, Continuous, Periodic
1 hour; 12 hours; 1 day; 2 days; 3 days; 4 days; 5 days;
6 days; 1 week
90.0... 99.5%
0.0... 120.0% Un
0.0... 120.0% Un
0.0... 120.0% Un
One data set for updating; One data set from the
previous observation period
1MRS 751802-MUM