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Operators Tools
7-26
The quantities can be represented in these views:
• Time signals
• Vector diagrams
• Locus diagrams
• Harmonics
Selection takes place using the menu bar (9LHZ), or in the symbol bar above the rep-
resented switching fields. Figure 7-29 shows all four views simultaneously.
The waveform data read into the PC memory are first shown in full on the monitor. Cur-
rent, and possibly voltage, for each phase and the ground are represented separately.
The fault number, data and time, network, and feeder are also displayed.
Representation of primary or secondary quantities can be selected. The base values
for currents and voltages are the nominal values of the transformers (CTs or VTs). An
identical scale is used for all currents, relative to the largest occurring secondary cur-
rent value (instantaneous value), and for all voltages, relative to the largest occurring
secondary voltage value (instantaneous value).
Figure 7-29
DIGRA 4, Diagrams in the Four Possible Views
During configuration any signal can be selected in its properties to be displayed in the
oscillographic record. (See chapter 5.2.3).
Further details about the many possibilities that DIGRA
DIGRA handbook (Order No. E50417–H1176–C070).
®
4 offers can be found in the
7SJ63 Manual
C53000-G1140-C120-1
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