Functions
2.11 Measures for Weak and Zero Infeed
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
276
Figure 2-141 Logic diagram of the weak infeed tripping
*) Where the distance protection and the earth fault protection function share the same transmission channel (address
2509 = YES) and neither the distance protection nor the earth fault protection are blocked, the output of this gate is
an AND combination of the inputs.