Vanguard TTRA-S2 (ATRT-03 S2, ATRT-03A S2, ATRT-03B S2, Tri-Phase) - Manual (Page 48)

TTRA-S2 VERSION 1.x SOFTWARE MANUAL REV 2
45
7.0 USING THE TRANSFORMER TURNS RATIO CALCULATOR
The TTRA-S2 software features a turns ratio calculator that can be used to quickly calculate the
winding turns ratio of a transformer. To use the calculator:
1. Click on the File menu and select Calculator. The calculator window will be displayed as
shown below:
2. Type the H voltage and X voltage values in the corresponding fields.
3. Select the transformer type from the “Type:” drop-down list.
4. If desired, type a percentage value in the “Percent:” input field. This option calculates
the turns ratio at the specified percentage of the nameplate voltage. For example, if the
H nameplate voltage is 12,000V, the X nameplate voltage is 1200V, the transformer type
is single phase, and the percentage value of 80 is used, the turns ratio will be calculated
as:
Ratio = (V
H
/ V
X
) x (Percent / 100)
= (12,000 / 1200) x (80 / 100)
= 8.00
5. Click on the “Calculate” button and the calculated ratio will be displayed to the right of
the “Ratio:” label.