Setup, Connections & Operation
AVTMTTR20 Rev 4 Dec 2015
17
NOTE:
Dots on the housing of the transformer are commonly used to
identify terminals of the same polarity.
F
WARNING
Failure to observe proper connections will result in a safety hazard and
may result in damage to the test set or CT. Failure to observe voltage
rating of low-current X winding may result in damage to the CT.
NOTES:
1.
The TTR20 may supply up to 100 mA of excitation current (4 digit
resolution). The TTR20 will automatically select the appropriate test
voltage (8 V, 1.5 V, or 0.5 V) when testing CTs. Some current
transformers with turn ratio of 50:5 and less may require more than 100
mA of excitation current when excited from 0.5 V source. These CTs
can not be tested with the TTR20.
2.
Expect that polarity of the windings is normal (“+” sign is displayed in
front of the turns ratio test result).
Summary of Contents for TTR20
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