Siemens SIPROTEC 5 Manual page 373

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Figure 8-6
Logic
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Figure 8-7
The Threshold min/max parameter is the criterion by which a phase-to-phase voltage unbalance is meas-
ured. The device calculates the ratio between the minimum (V
voltage.
Enter the lower limit of the maximum phase-to-phase voltage (V
threshold. This specifies the lower limit of the operating range of this function.
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Characteristic of the Voltage-Balance Supervision
Logic Diagram of the Voltage-Balance Supervision
8.3 Supervision of the Secondary System
) and the maximum (V
min max
) with the parameter Release
max
Supervision Functions
) phase-to-phase
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