Siemens siprotec SJ62 User Manual page 66

Figure 2-5 Logic diagram of the 50-1 current element for phases
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
The following figures show the logic diagrams for the current elements 50-1 and 50N-
1.
The dropout delay only operates if no inrush was detected. An incoming inrush will
reset a running dropout delay time.
If parameter MANUAL CLOSE is set to 50 -1 instant. and manual close detection
applies, the trip is initiated as soon as the pickup conditions arrive, even if the element
is blocked via binary input. The same applies to 79AR 50-1 instantaneous.
2.2 Overcurrent Protection 50, 51, 50N, 51N
64