Omicron Lab CT Analyzer, User Manual

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Short Guide for Running a CT Test
3 Short Guide for Running a CT Test
This chapter provides a short guide for running a CT test using the CT Analyzer .
This short guide is intended as an overview of a complete test procedure. For
more detailed information, please refer to chapter 4 on page 49.
This short guide does not consider the residual magnetism measurement (see
section 6.4 on page 102) and does not use the guesser function of the
CT Analyzer (see chapter 7 on page 131).
When working with the CT Analyzer , always observe the safety rules given in
section 2.1 on page 21.
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.
Warning: Do not touch the equipment under test or the measurement leads
while the red LED on the CT Analyzer is flashing. Never connect or disconnect
measurement leads while the red LED on the CT Analyzer is flashing.
As long as the red LED is flashing, the output is active and lethal voltages can
occur due to the high energy stored in external inductors.
Warning: Always make sure that the CT Analyzer output is connected to the
correct side of the current transformer according to the wiring instructions given
in sections 2.4 and 2.5. Accidentally mixing up the windings can cause life-
threatening voltages within the transformer and/or destroy the connected CT
or the
CT Analyzer !
Warning: Feeding test voltage to a tap of a multi-ratio CT can cause life-
threatening voltages on other taps with higher ratios. Do not touch these taps!