Omicron Lab CT Analyzer, Руководство пользователя

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Setup and Connection
4. Connect the black "Output" socket and the black socket of input "Sec" of the
CT Analyzer to that terminal on the secondary side of the CT that is
connected to PE.
5. Connect the red "Output" socket and the red socket of input "Sec" of the
CT Analyzer to the other (ungrounded) terminal on the secondary side of the
CT.
Figure 2-2 Basic wiring for a CT test
Note: The CT may make humming or buzzing noises of varying frequency
during the CT test. This is completely normal and does not indicate a defective
CT.
Utility line
Prevent coupling of interferences into the primary circuit (e.g. by
disconnecting the utility line, switching off the breaker, etc).
Coupling of interferences into the ungrounded connection
influences the measurement results.
The side that is able
to receive more
interferences has to
be connected to PE.