Vanguard TTRA (ATRT-01, ATRT-03, ATRT-03A, and ATRT-03B) - Manual (Page 40)

TTRA VERSION 12.x SOFTWARE MANUAL REV 5
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5.8 Creating Test Plans
The TTRA software can be used to create test plans for transformers, load tap changers, and
voltage regulators.
5.8.1. Creating a Test Plan for a Transformer
To create a test plan for a transformer:
1. From the Test-Plan menu or the File menu, click on Create Test Plan, and then click on
Transformer. An empty test plan will be displayed as shown below:
2. Enter the header information in the top section. You can use the [Tab] key to move from
one input area to the next or you can click on the desired input area.
3. Click on the “Type:” drop-down list and select the transformer type.
4. You can set the maximum deviation percentage by clicking in the “Max. Dev. %” input
area and typing in the desired value.
NOTE
When using a test plan to run the turns-ratio test, the measured turns-ratio
is compared against the calculated turns-ratio. The difference (deviation)
between the two turns-ratios is calculated as the percentage difference (see
section 4.8.2 for the formula). A deviation greater than the preset “Max.
Dev. %” will be marked as “F” (Fail) in the “P/F” column.