Transformer K-Factor Calculator

Calculate K-factor rating for transformers supplying non-linear (harmonic-producing) loads per IEEE C57.110.

% of total RMS current at fundamental.
%
% of fundamental for 3rd harmonic.
%
% of fundamental for 5th harmonic.
%
% of fundamental for 7th harmonic.
%
% of fundamental for 9th harmonic.
%

Results

K-Factor-
Recommended K-Rating-
Current THD-%
References: IEEE C57.110; UL 1561 — K-Rated Transformers