Siemens siprotec 7SA522 - Page 134

2 Functions
134
7SA522 Manual
C53000-G1176-C155-3
The circuit breaker can also be tripped at the line end with no or only weak infeed. This
“Weak-infeed tripping” is referred to in Section 2.9.1.
Figure 2-52 Logic diagram of the permissive overreach transfer trip (POTT) scheme (one line end, conventional, no pro-
tection data interface)