Siemens SIPROTEC 7SJ62 Manual page 183

Multi-functional protective relay with local control
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Functions
2.9 Frequency Protection 81 O/U
The following figure shows the logic diagram for the frequency protection function.
Figure 2-62
Logic diagram of the frequency protection
SIPROTEC, 7SJ62/64, Manual
183
C53000-G1140-C207-2, Release date 01.2008

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