Power Quality Analyzer PowerPad
®
IV Model 8345
121
20.2.7 Level of Harmonic Group Distortion
The quantities are calculated in accordance with standard IEC 61000-4-7 A1,
edition 2.0, § 3.3.2.
20.2.8 Distortion
20.2.9 K Factor and Harmonic Loss Factor
These quantities concern only the current and are calculated in accordance with
standard IEEE C57.110, 2004 edition, § B.1 and § B.2.
The K-factor (KF) is a nominal value applied to a transformer to indicate its
ability to be used with loads that consume non-sinusoidal currents:
With IR = nominal current of the transformer
Harmonic loss factor (FHL):
K factor (FK)
Derating of the transformer as a function of the harmonics:
With: e
∈
[0.05 ; 0.1] and q
∈
[1.5 ; 1.7]