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10 Graphing Records
10-50 TESLA LITE User Manual D03283R01.10
imposed on the calculated phase impedances (note that the characteristics are
zoomed using free-form zoom to get a better resolution).
Figure 10.72: Example Superimposing the Zone Characteristics
In the above example phase-phase impedances Zab, Zbc and Zca are selected,
indicated by a check mark, but only Zca is in the zoom range.
All the four zones mho characteristics are superimposed. You can see that the
Zca impedance has entered the Zone 2 and Zone 3. You can use a combination
of zoom and time window control to analyze the precise time at which the im-
pedance enters the zones.
Figure 10.73: Example Showing the Line and Blinder Impedances
Check the Z-Line and Blinder boxes; then select the Apply button to superim-
pose the line and blinder impedances.
Line Impedance
Blinder Impedance