Omicron CT SB2 User Manual page 30

CT Analyzer User Manual
4. Connect the black OUTPUT socket and the black socket of input SEC of 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 CT Analyzer to the other
(ungrounded) terminal on the secondary side of the CT.
Utility line
The side that is able
to receive more
interferences has to
be connected to PE.
Figure 3-2: Basic wiring for a CT test
Note: The CT may make humming or buzzing noises of varying frequency during the CT test. This is
normal behavior and does not indicate a defective CT.
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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.
OMICRON