Omicron Lab CT Analyzer User Manual page 154

CT Analyzer User Manual
152
The following values are displayed in the Results VT Ratio card:
Value Description
Output Internally measured RMS current value and phase of the output
signal.
Sec RMS value of the voltage measured at input "Sec".
This input is considered as the phase reference, therefore the
phase is always 0.
Prim RMS value and phase of the voltage measured at input "Prim".
N Voltage ratio of the VT calculated from the voltages measured
at inputs "Sec" and "Prim".
f Frequency measured at input "Sec".
Proceed as follows to perform a VT ratio measurement:
1. Connect the "Output" sockets and input "Sec" of the CT Analyzer to the
primary side of the VT and input "Prim" of the CT Analyzer to the secondary
winding of the VT (see Figure 8-12).
Figure 8-12 Wiring example for VT ratio measurement
Warning: Hazardous voltages will occur on the primary side of the VT if the
CT Analyzer output is connected to the secondary side of the VT by mistake!
2. Open the Quick Test measurement function on the CT Analyzer or start the
CTA QuickTest PC tool from the CTA Start Page.