Structure of the Function
The function is part of protection function groups which are connected with a 3-phase voltage and current
measurement point.
[dwstrffm-210113-01.tif, 1, en_US]
Figure 8-4 Structure/Embedding of the Function
The function is broken down into 3 subfunctions (see Figure 8-5):
•
Supervision for unbalanced measuring-voltage failure
•
Supervision for 3-phase measuring-voltage failure
•
Supervision for switching onto a 3-phase measuring-voltage failure
[lozusamm-100611-01.tif, 2, en_US]
Figure 8-5
Breakdown of the Measuring-Voltage Failure Detection Function
Each subfunction creates its own monitoring indication. The function summarizes these indications via the
group indication Alarm.
The response to the detection of a measuring-voltage failure is explained in the specific protection-function
descriptions.
8.3.2.2
Supervision Functions
8.3 Supervision of the Secondary System
SIPROTEC 5, High-Voltage Bay Controller, Manual 939
C53000-G5040-C015-9, Edition 11.2017
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