Mounting and Commissioning
3.3 Commissioning
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
279
3.3.14
Triggering Oscillographic Recording for Test
In order to test the stability of the protection during switch-on procedures also, switch-on trials can also be
carried out at the end. Oscillographic records obtain the maximum information about the behavior of the pro-
tection.
Prerequisite
Along with the capability of storing fault recordings via pickup of the protection function, the 7SD80 also has
the capability of capturing the same data when commands are given to the device via the service program
DIGSI
®
, the serial interface, or a binary input. For the latter, event
„FltRecSta“
must be allocated to a binary
input. Triggering of the recording is done e.g. via the binary input on switch-on of the protection object.
An oscillographic recording that is externally triggered (that is, without a protective element pickup or device
trip) is processed by the device as a normal oscillographic recording, and has a number for establishing a se-
quence. However, these recordings are not displayed in the fault indication buffer, as they are not fault events.
Start Triggering Oscillographic Recording
In order to start a test measurement recording via DIGSI, select in the left of the window the operator function
Test
. Double-click in the list view the entry
Test Wave Form
(see Figure 3-32).
Figure 3-32
Test Wave Form window in DIGSI - Example
Oscillographic recording is immediately started. During the recording, an annunciation is output in the left area
of the status line. Bar segments additionally indicate the progress of the procedure.
The SIGRA or the Comtrade Viewer program is required to view and analyze the oscillographic data.