Omicron Lab CT Analyzer User Manual page 157

Note: The resistance measurement uses the serial equivalent circuit diagram
for results calculation.
Use the following wiring for resistance measurement (example):
Figure 8-16 Wiring example for resistance measurement
Proceed as follows to perform winding resistance
measurement on VTs:
1. Connect the "Output" sockets and input "Sec" of the CT Analyzer to the
winding to be measured (see Figure 8-16).
2. Open the Quick Test measurement function on the CT Analyzer or start the
CTA QuickTest PC tool from the CTA Start Page.
3. Select the Resistance measurement type and set the amplitude of the DC
output current appropriately. Refer to Figure 8-17.
Caution: Use only low currents of e.g. 100mA when measuring the primary
side of VTs. Too high currents could destroy the winding!
Measurement settings
Figure 8-17 CT-Quick test card with settings for VT winding resistance
measurement
4. Start the measurement by pressing the
clicking the ON button on the Resistance tab of the CTA QuickTest
software. The measured values are displayed and permanently updated as
long as the measurement is active. Refer to Figure 8-18.
Using the Quick Test Feature
key on the CT Analyzer or
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