AJ0383DE ZP-AJ01E TRAX
37
5 OPERATING INSTRUCTIONS
Settings
1] Press
Step Vs reduction per demag cycle
(default 50%)
Display % remanence or absolute values in Vs
(default %)
Step-by-step instructions
1] Connect generator cable and R1 measure-
ment cable to the transformer HV terminals.
If YN, connect to H2/V to neutral, if Y or D
connect H1/U to H2/V.
2] Select generator.
3] Select demagnetization current, normally the
same as the test current, about 1% of rated
winding current.
4] Press to start test
5] Demagnetization starts and stops automati-
cally when finished.
5.7 Turns ratio
Important
Read and comply with the safety instruc-
tions “2 Safety” on page 8.
Always comply with local safety regula-
tions.
1] Press
TRAX turns ratio app determines the transformer
turns-ratio as defined by international standards. The
app provides an excitation test voltage to the primary
windings of the transformer and measures simulta-
neously the voltage at the corresponding secondary
winding. The voltage ratio is displayed and compared
with the expected nameplate ratio.
TRAX measures ratio, phase deviation and excitation
current at the same time. Testing can be done at
power frequency, or preferably at a frequency differ-
ent from the power frequency to avoid interference.
Default test frequency is 55 Hz.
Transformer configuration
Transformer configuration and vector group is select-
ed by entering configuration via. keyboard or selecting
in the matrix.
If no configuration is entered the test will automati-
cally be defined as a manual TTR test on a 2-winding
transformer.
Note It is possible to mix configured and manual
tests in the same session but NOT two tests
with different configurations.
Define the winding pair to test (nameplate voltages).
If the configuration is a three-winding transformer,
select which winding pair to define and/or test.
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