Siemens SIPROTEC Manual page 605

Line differential protection with distance protection
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Technical Data
4.9 Earth Fault Protection in Earthed Systems (optional)
Figure 4-4
Trip time characteristics of inverse time overcurrent stage, acc. ANSI/IEEE (phases and earth)
SIPROTEC, 7SD5, Manual
605
C53000-G1176-C169-5, Release date 02.2011

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