TTR 300 Series PowerDB Lite User Manual
AVTMTTR310 Rev 8 May 2016
103
Operating Instructions for the Simple 3PH TTR Form
This form can be used for testing a two or three winding transformer with
multiple taps on one or more of the windings.
If you are testing a three winding transformer please check the “Has Tertiary”
checkbox.
Next select the winding configuration by using the left and right arrow keys.
Press the Enter or Tab key to move to the next field.
The default total number of tests is defined as follows:
1. Test for each secondary (or tertiary) tap tested with the primary nominal tap.
2. Test for each primary tap with the nominal secondary (or tertiary) tap.
If you do not wish to test all of the secondary or tertiary taps you can reduce the
“# tests” field for each category of tests (primary, secondary, tertiary).
Once the total number of taps and the # tests field are entered the form will
display the correct number of rows to perform testing.
Once the voltage is entered for the first and last tap values (from the
transformer’s nameplate tap voltage table), the ratios for all taps will
automatically be calculated and populated. Please note that the calculated values
can be over written.
Right click on each of the blue highlighted fields in each table to run the tests.
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