Stage With Inverse-Time Overcurrent Protection With Logarithmic-Inverse Char- Acteristic Curve; Description - Siemens 7SJ82 Manual

Protection and Automation Functions
6.7 Directional Overcurrent Protection, Ground
Stage with Inverse-Time Overcurrent Protection with Logarithmic-Inverse
6.7.7
Characteristic Curve
6.7.7.1

Description

Logic of the Stage
[lodiloin-280812-02.tif, 2, en_US]
Figure 6-74
Apart from the operate curve, this type of stage is identical to the Inverse-time overcurrent protection –
advanced stage (see chapter
This section will only discuss the nature of the operate curve. For further functionality, refer to chapter
6.7.6.1 Description.
470
Logic Diagram of the Directional Logarithmic Inverse-Time Overcurrent Protection, Ground
6.7.6.1 Description).
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017