Pqe - ABB REX 521 Technical Reference Manual, Standard Configurations

1MRS 751802-MUM
7.3.5.
7.3.6.
7.3.7.
Protection Relay
Technical Reference Manual, Standard Configurations
3U
The measurement function block 3U measures true RMS phase-to-earth or phase-to-
phase voltages. If voltage dividers are used, only phase-to-earth voltages can be
measured. If voltage transformers are used, only only phase-to-phase voltages can
be measured. The voltage values are updated once per fundamental frequency cycle,
i.e. the integration time for true RMS calculation is one fundamental cycle.
3U
UL1_U12
UL2_U23
UL3_U31
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Three-phase voltage measurement, 3U
UL1_U12
UL2_U23
UL3_U31
UL1_U12
UL2_U23
UL3_U31
UL1_U12 average
UL2_U23 average
UL3_U31 average
UL1_U12 average
UL2_U23 average
UL3_U31 average
f
The measurement function block f measures the frequency of the network.
f
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System frequency measurement, f
Frequency
Average Freq.
Voltage U

PQE

The measurement function block PQE measures fundamental frequency three-phase
power and energy.
0.00...999.99 kV
0.00...999.99 kV
0.00...999.99 kV
0.00...2.00 x Un
0.00...2.00 x Un
0.00...2.00 x Un
0.00...999.99 kV
0.00...999.99 kV
0.00...999.99 kV
0.00...2.00 x Un
0.00...2.00 x Un
0.00...2.00 x Un
10.00...75.00 Hz
10.00...75.00 Hz
0.0...2.0 x Un
REX 521
95