Functions
2.2 Phase Comparison Protection and Ground Differential Protection
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
68
Tripping Logic
The following figure shows the tripping logic of the differential protection.
Figure 2-16 Differential protection trip
If the pickup signals apply for longer than the configurable trip time delay, the differential protection trips.
2.2.6 87 Differential Protection
The following tables provide an overview of the parameters and information of the functions:
- phase comparison protection
- Ground current differential protection in grounded systems
- ground fault differential protection in resonant-grounded/isolated systems
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