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Tests Performed
Add tap positions from the nameplate, then click "Load to TTR" to pre-populate the TTR table.
PI = 10 min ÷ 1 min · DAR = 1 min ÷ 30 s · Colours use IEEE Std 43's PI ≥ 2.0 / DAR ≥ 1.25 (rotating machines) · NETA's transformer minimum is PI not less than 1.0 (dry-type: DAR too)
LV: enter in nameplate · Calc Ratio = Tap V ÷ LV V
Exc = excitation current (mA) · Polarity: ✓ Correct / ✕ Reversed
R_corr = R_meas × (k + 20) / (k + T) · Cu k = 234.5 · IEEE C57.12.91
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