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Pickup of the differ-
Figure 2-21 illustrates the logic diagram of the breaker failure protection. The phase-
ential protection
selective indications of the stages are summarised to form general phase indications.
Additionally the device provides information of which stage picked up.
Figure 2-21
Pickup logic for the differential protection function
As soon as the differential protection function registers a fault within its tripping zone,
the signal „Diff. Gen. Flt." (general device pickup of the differential protection)
7SD610 Manual
C53000-G1176-C145-4
2.3 Differential Protection
69
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