Excitation Graph - Omicron Lab CT Analyzer User Manual

CT Analyzer User Manual
6.6.4

Excitation Graph

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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
Standard Vertical axis
IEC 60044-1 r.m.s. terminal voltage
IEC 60044-6 r.m.s. e.m.f. voltage
IEC 61869-2
average rectified
voltage
IEEE C57.13 r.m.s. e.m.f. voltage
1. Calibrated to r.m.s.
Available soft keys
Moves the cursor upwards on the excitation graph.
Moves the cursor downwards on the excitation graph.
Horizontal axis
r.m.s. excitation current
peak excitation current
r.m.s. excitation current
1
terminal
r.m.s. excitation current