Stage with Knee-Point Characteristic Curve
Description
Logic of the Stage
[lodilokn-280812-02.tif, 3, en_US]
Figure 7-117
Logic Diagram of the Directional Logarithmic Inverse Time with Knee-Point Overcurrent Protec-
tion, Ground
Apart from the operate curve, this type of stage is almost identical to the Inverse-time overcurrent protec-
tion – advanced stage (see chapter
). The only difference is that the dynamic settings
change functionality is not available.
This section only discusses the nature of the operate curve. For further functionality, refer to chapter
.
7.7.8
7.7.8.1
Protection and Automation Functions
7.7 Directional Overcurrent Protection, Ground
736
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
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