Control During Operation
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7SS52 V4 Manual
C53000-G1176-C182-1
Double-click an entry in the list view in the right section of the window. The window
for selecting the oscillographic records opens. The list view gives an overview of all
available bay units. They are displayed with the number and the name you have as-
signed them in DIGSI Manager. The column indicating the status shows whether
and how the corresponding bay unit is involved in the fault event
.
Figure 6-12 Selection of oscillographic records in DIGSI − Example
In the column Transfer activate the checkboxes of the bay units you wish to read
out. The checkboxes of the bay units with the states with participation/ with tripping
and with participation/ without tripping are already active. Regardless of whether
you have selected bay units for the transmission, the fault data of the central unit
are always transmitted.
Then click OK. The fault data are read out and saved. One of the above mentioned
programs is started and the fault data are loaded (see also the DIGSI Manual “Op-
eration”, Subsection 8.3.3). SIGRA 4 opens the fault data of the central unit and of
the bay units in a window.
The SIGRA 4 system program helps you analyze fault events in the power system.
SIGRA 4 processes the data recorded during a fault and presents them graphically.
From the recorded measured values it calculates additional measured quantities such
as time signals or r.m.s. values which help you evaluate the fault record.
Note
When you retrieve the fault data centralized via DIGSI, the following fault records will
not appear in the list view:
• If a local fault record is triggered via the backup protection of a bay unit or by the
trip of an external breaker failure protection in a bay unit, it will depend on the setting
of the parameter fault rec mode (6401A/CU) where additional fault records are
created in the system (Chapter 5.6.2, page 159). A system event buffer is always
created regardless of this fact. Fault records, which are not transmitted to the cen-
tral unit, must be retrieved from the bay unit by means of DIGSI.
• Fault records of a bay unit running in stand-alone mode are not transmitted to the
central unit and must be retrieved from the bay unit by means of DIGSI. For each
system event these fault records are numbered starting from 900 upwards.
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