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Stage Description
7.17.3
Logic of a Stage
[louvpuxx-100611-01.tif, 1, en_US]
Figure 7-155
NOTE
i
i
If the function Undervoltage protection with any voltage is used in a 1-phase function group, the param-
eter Measured value is not visible.
Method of Measurement
The Method of measurement parameter allows you to define whether the function works with the funda-
mental component or the calculated RMS value.
•
Measurement of the fundamental component:
This method of measurement processes the sampled voltage values and filters out the fundamental
component numerically.
•
Measurement of the 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.
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
Logic Diagram of a Stage: Undervoltage Protection with Any Voltage
Protection and Automation Functions
7.17 Undervoltage Protection with Any Voltage
819
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