[lo_UVP3ph_In, 4, en_US]
Figure 6-203
Logic Diagram of the Inverse-Time Undervoltage Protection with 3-Phase Voltage
Method of Measurement
With the Method of measurement parameter, you define whether the stage uses the fundamental
comp. or the RMS value.
•
Measurement fundamental comp.:
This method of measurement processes the sampled voltage values and filters out the fundamental
component numerically.
•
Measurement RMS value:
This method of measurement determines the voltage amplitude from the sampled values according to
the defining equation of the RMS value. Harmonics are included in the analysis.
Protection and Automation Functions
6.29 Undervoltage Protection with 3-Phase Voltage
SIPROTEC 5, Overcurrent Protection, Manual 743
C53000-G5040-C017-8, Edition 07.2017
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