Siemens SIPROTEC 7UM62 - Page 71

Functions
2.9 Definite-Time Overcurrent Protection (I>>, ANSI 50, 51, 67) with Direction Detection
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
71
Figure 2-15 Logic Diagram of I>> Stage with Direction Element