CT Analyzer User Manual
30 OMICRON
3.4.3 Wiring for primary resistance measurement
Applicable for Advanced CT Test mode only.
For the primary winding resistance measurement, connect CT Analyzer as shown in Figure 3-4.
Observe the general safety rules in section 3.1 on page 23 and the safety instructions given in chapter
1 "Safety instructions" on page 9.
1. Make sure that the primary side of the CT is connected to PE on one side and open on the other side.
2. Disconnect the burden from the winding/core under test in order to remove any load from the CT.
Every kind of load remaining on the secondary side of the core under test during measurement leads
to incorrect measurement results or error messages.
3. Connect the black socket of CT Analyzer input PRIM to the grounded side of the CT’s primary
winding and the red socket of this input to the open (ungrounded) side.
4. Connect the black OUTPUT socket of CT Analyzer to the grounded side of the CT’s primary winding
and the red OUTPUT socket to the ungrounded side of the primary winding.
Figure 3-4: Basic wiring for primary winding resistance measurement
WARNING
Death or severe injury caused by high voltage or current possible
The primary winding resistance measurement is performed with DC current.
► Do not open the measurement circuit while current is flowing.
► Stop the measurement by pressing the key on the CT Analyzer test set and wait
until the red LED is off before opening the measurement circuit.
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