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Once test begins to run for any resistance, following
screen will appear:
Controls are as follows:
i)
Test Setup: allows changes to test parameters, which can be seen in step 4 above (and described in
section
iv
below). This button is ‘greyed out’ once testing begins or MTO instrument connection is not
established.
ii)
Test Mode: enables various testing to Start, Continue, Save Results etc. as testing is conducted. This
button guides operator through testing, providing instruction for next steps.
iii)
Abort/Exit: allows disruption of test and/or exiting once test is concluded.
iv)
Results Graph: plots resistance results for diagnostic review. This is useful in determining that each
past result is following an expected pattern. Different OLTC tap changers develop different shaped
patterns such as V, Saw Tooth, Slope curves. Familiarity with these tap changers helps improve diagnostic
capability.
v & vi)
Measured Resistance: result with color background changes using “Reading Sta Time
for stable reading” setting as shown in section
iv
above. When condition is reached, background turns
green.
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Once all tests are complete and this window closes,
results will appear on test form:
Saving Results – once test is completed, form will prompt to save result.
After name is entered, results are automatically saved as each test is
completed.
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