Interaction With Control, Ar And External Control - Siemens siprotec SJ62 User Manual

2.19.1.7 Interaction with Control, AR and External Control

With Control
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Basically, the synchrocheck interacts with the device control. The switchgear compo-
nent to be synchronized is selected via a parameter. If an ON command is issued, the
control takes into account that the switchgear component requires synchronism. The
control sends a measurement request („25 Measu. req.") to the synchrocheck
which is then started. Having completed the check, the synchrocheck issues the
release message („25 CloseRelease") to which the control responds by terminat-
ing the switching operation positively or negatively (see Figure 2-102).
Figure 2-102 Interaction of control and synchrocheck
2.19 Synchronism and Voltage Check 25 (7SJ64 only)
290