Siemens SIPROTEC 4 7UT6 Series Manual page 139

Differential protection
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[logikdia-ueberstromstufen-i-fuer-phasenstrom-121102-st, 1, en_GB]
Figure 2-69
SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
Logic diagram of the overcurrent stage I> for phase currents (simplified)
2.4 Time Overcurrent Protection for Phase and Residual Currents
Functions
139

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