Mounting and Commissioning
3.3 Commissioning
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
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3.3.18 Triggering Oscillographic Recording for Test
In order to verify the reliability of the protection relay even during inrush processes, closing tests can be carried
out to conclude the commissioning process. Oscillograhpic records provide the maximum information about the
behaviour of the protection relay.
Prerequisite
Along with the capability of storing fault recordings via pickup of the protection function, the 7SD5 also has the
capability of capturing the same data when commands are given to the device via the DIGSI software, the serial
interface, or a binary input. For the latter, the information „>Trig.Wave.Cap.“ must be allocated to a binary
input. In this case, a fault record is triggered e.g. via binary input when the protected object is energized.
Such a test fault record triggered externally (i.e. not caused by pickup of a protection function) is processed like
a normal oscillographic record, i.e. a fault log with number is generated which univocally identifies an oscillo-
graphic record. However, these recordings are not displayed in the trip log as they are not fault events.
Start Test Measurement Recording
To trigger test measurement recording with DIGSI, click on Test in the left part of the window. Double click in
the list view the Test Wave Form entry (see Figure 3-38).
Figure 3-38 Triggering oscillographic recording with 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 analyse the oscillographic data.
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