Structure of the Function
The Voltage-sum supervision function is located in the Power-system data function group of each 3-phase
voltage measuring point.
[dwstrvss-100611-01.tif, 2, en_US]
Figure 8-14 Structure/Embedding of the Function
Function Description
The voltage sum is generated by addition of the voltage phasors. Errors in the voltage circuits are detected if
VF = |
VA+ VB + VC + Vph/VN • VN | > Threshold, where Vph/VN forms the Matching ratio Vph / VN
parameter.
[lokenvss-100611-01.tif, 1, en_US]
Figure 8-15 Characteristic of the Voltage-Sum Supervision
8.3.6.2
8.3.6.3
Supervision Functions
8.3 Supervision of the Secondary System
SIPROTEC 5, High-Voltage Bay Controller, Manual 955
C53000-G5040-C015-9, Edition 11.2017
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