Siemens SIPROTEC 4 7SD80 Manual page 52

Functions
2.2 Phase Comparison Protection and Ground Differential Protection
[lo-pvl-empfangen-20110530, 1, en_US]
Figure 2-7
The following figure shows the formation of the phase-specific pickup of the phase comparison protection.
Figure 2-
[lo-pvl-anr-gegenende-20110530, 1, en_US]
Figure 2-8
The following figure shows the pickup behavior of the phase comparison protection in resonant-grounded or
isolated systems.
52
Phase comparison protection, receiving the differential protection information from the oppo-
site end
Logic diagram of phase comparison protection for pickup in a grounded system
SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018