Stage with Negative-Sequence Voltage/Positive-Sequence Voltage
Description
Logic of a Stage
[lo_V2V1_PROV_20150326, 1, en_US]
Figure 6-196
Logic Diagram of the Stage: Overvoltage Protection with Negative-Sequence Voltage/Positive-
Sequence Voltage
Method of Measurement
The stage uses the average value of the negative-sequence voltage/positive-sequence voltage, which is calcu-
lated from the function block General Functionality. For more information, refer to chapter 6.28.3.1 Descrip-
tion.
Blocking the Stage
In case of blocking, the picked up function is reset. The following blocking option is available for the function:
•
From an external or internal source via the binary input signal
>Block stage
Application and Setting Notes
Parameter: Threshold
•
Default setting (_:17071:3) Threshold = 10.00 %
The parameter Threshold is set in percentage according to the definition of the symmetrical compents. It is
the ratio of the negative-sequence voltage to positive-sequence voltage.
Specify the Threshold (pickup threshold) for the specific application.
6.28.4
6.28.4.1
6.28.4.2
Protection and Automation Functions
6.28 Overvoltage Protection with Negative-Sequence Voltage/Positive-Sequence Voltage
730 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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