Omicron Lab CT Analyzer, User Manual

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Using the Quick Test Feature
8.6 CT Ratio Measurement
This is a predefined measurement type, intended especially for the quick
measurement of CT ratios.
To select the CT Ratio measurement type, use the cursor key to move the
cursor to the Measurement Type field in the CT-Quick card and then press the
CT Ratio soft key.
Figure 8-9 CT-Quick card and Results card for CT ratio measurement
For the CT Ratio measurement type, the CT-Quick card holds the following
measurement quantities:
Caution: CT ratio measurement using Quick Test is not a complete CT test!
This measurement only determines the current ratio of CTs. The CT Analyzer
does not perform automatic demagnetization after the 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
Load Fixed to "On".
Setting the
Load parameter to "on" and specifying the winding
resistance and the unsaturated inductance in the fields R and L
will prevent saturation of the connected CT.
The output generator of the
CT Analyzer then keeps the DC part
of the output current at zero using a current regulator
permanently running during the output of AC signals.
Press the Main soft key in
any test card
Main Menu:
- New Quick-Test
OK soft key
CT-Quick card:
Measurement Type:
CT Ratio
How to get there: