Vt Ratio Measurement - Omicron Lab CT Analyzer User Manual

8.7

VT Ratio Measurement

This is a predefined measurement type, intended especially for the quick
How to get there:
measurement of VT ratios.
Press the Main soft key in
any test card To select the VT Ratio measurement type, use the
Main Menu:
cursor to the Measurement Type field in the CT-Quick card and then press the
- New Quick-Test
VT Ratio soft key.
OK soft key
CT-Quick card:
Measurement Type:
VT Ratio
Figure 8-11
For the VT Ratio measurement type, the CT-Quick card holds the following
measurement quantities:
Warning: For VT ratio measurement, the CT Analyzer output has to be
connected to the primary side of the VT. Connecting the CT Analyzer output
to the secondary side of the VT by mistake will cause hazardous voltages on
the primary side!
Caution: VT ratio measurement using Quick Test is not a complete VT test!
This measurement only determines the voltage ratio of VTs. The CT Analyzer
does not perform automatic demagnetization after the measurement.
CT-Quick card and Results card for VT ratio measurement
Parameter Description
Output The output signal type is fixed to "AC".
U/I Operating mode of the internal signal generator: voltage or
current source. Fixed to "Voltage".
Amplitude RMS voltage of the output signal. Adjustable by the user.
Possible values: 0 to 40V. Default: 1.00V.
f Frequency of the output signal. Adjustable by the user.
Possible values: 5.0 to 400.0Hz or soft keys 16.7Hz, 50Hz,
60Hz or 400Hz.
Default: 50Hz
Using the Quick Test Feature
cursor key to move the
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