Omicron Lab CT Analyzer, User Manual

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CT Analyzer User Manual
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6.6.4 Excitation Graph
The excitation graph page shows the graph calculated from the test results. To
display the excitation graph, press the
Excit. Graph soft key in the Excitation
card. The graph shows the r.m.s. terminal/core voltage over the r.m.s./peak
current depending on the selected standard.
On the bottom right of the diagram the voltage, current and inductance values
for the selected point in the graph are displayed. The currently selected point in
the graph is marked by a horizontal and a vertical dashed line.
In this page it is possible to load the excitation graph of an already saved test
from the Compact Flash card in order to compare this graph with the one of the
current test.
Figure 6-13 Excitation graph
Definition of axes in the excitation graph for different
standards
Available soft keys
Standard Vertical axis Horizontal axis
IEC 60044-1 r.m.s. terminal voltage r.m.s. excitation current
IEC 60044-6 r.m.s. e.m.f. voltage peak excitation current
IEC 61869-2
average rectified
1
terminal
voltage
1. Calibrated to r.m.s.
r.m.s. excitation current
IEEE C57.13 r.m.s. e.m.f. voltage r.m.s. excitation current
Moves the cursor upwards on the excitation graph.
Moves the cursor downwards on the excitation graph.