Siemens SIPROTEC 7SD80 Manual page 308

The digital overcurrent protection
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Technical Data
4.7 Time Overcurrent Protection
Figure 4-5
Trip time characteristics of inverse time overcurrent element, acc. ANSI/IEEE (phases and ground)
308
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011

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