Omicron Lab CT Analyzer, User Manual

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CT Analyzer User Manual
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2.4.2 Wiring for a Burden Test
For a burden test, connect the CT Analyzer as shown in Figure 2-3. Observe the
general safety rules in section 2.1 on page 21.
1. Open the connection line to the ungrounded side of the CT (refer to Figure
2-3).
2. Connect the black "Output" socket and the black socket of input "Sec" of the
CT Analyzer to that side of the burden that is connected to PE.
3. Connect the red "Output" socket and the red socket of input "Sec" of the
CT Analyzer to the other (ungrounded) side of the burden.
Figure 2-3 Basic wiring for a burden test
Caution: If you do not disconnect the CT for the burden test, the
CT Analyzer measures the parallel impedance of the burden and the CT
winding instead of the burden itself. Although in many cases the impedance
of the CT is many times higher than the burden impedance, this will cause a
measuring error.
The CT Analyzer does not perform demagnetization after burden
measurement. Therefore, CT saturation could occur if you do not disconnect
the CT prior to the burden test.
CT Burden