Siemens 7SK80 - Page 195

Functions
2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s)
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
195
Figure 2-69 Logic diagram during V0/I0 ϕ measurement, part 1