[lokenvss-100611-01.tif, 1, en_US]
Figure 9-15 Characteristic of the Voltage-Sum Supervision
Logic
[lovssumm-140611-01.tif, 2, en_US]
Figure 9-16
Logic Diagram of the Voltage-Sum Supervision
The device measures the phase-to-ground voltage and the ground voltage of the lines to be protected. The
sum of the 4 voltages must be 0.
Threshold
If the calculated fault voltage (V
F
) exceeds the Threshold, the parameter Operate delay triggers the indi-
cation Failure.
Supervision Functions
9.3 Supervision of the Secondary System
1262 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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