EZ
Virtual
Tools
Dashboard
All Calculators
Transformer Tap Changer Calculator
Calculate output voltage adjustment from transformer tap position changes.
Nominal Secondary Voltage
?
Nominal output voltage.
V
Tap Position (%)
?
Tap position as % of nominal (+2.5, +5, 0, -2.5, -5 typical).
%
Load Current
?
Current drawn by load.
A
Calculate
Results
Output Voltage
-
V
Output Power (3φ)
-
kVA
References:
IEEE C57.12.10; ANSI C84.1; IEEE C57.131