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Finally, there should be no more fault messages concerning the protection data inter-
faces.
WEB-Monitor
The topology and the statistical information on the protection data interfaces can be
displayed as a graph on the monitor using the „WEB-Monitor". For this you need a per-
sonal computer and a web browser. Figure 3-24 exemplifies a differential protection
system for three ends with a ring topology. The devices have been properly linked
(green shaded squares) and work as differential protection (status: Differential Mode).
The PC has been interfaced to the device with index 2 (PC-connected relay).
Figure 3-25 illustrates the interface data of a 7SD5 with GPS synchronization as an
example. The PC has been interfaced to the device with index 3 (PC-connected relay).
The transmission between device 2 and device 3 is 0.000 ms, the time between device
3 and device 1 is 0.763 ms for sending and 0.772 ms for receiving.
Figure 3-24
Example of a ring topology with three ends communicating correctly
7SD5 Manual
C53000-G1176-C169-1
3.3 Commissioning
489
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