
Manual
Issue 1.3
107
The voltages specified here are complex numbers and consist of an amount and an
angle.
Negative sequence unbalance
Zero sequence unbalance
13.1.12 Interference factor
TIF/THFF
f
1
: Nominal power system frequency (50 Hz or 60 Hz)
Factor
n
: Weighting factor for harmonic
n
Various methods are available for normalization of
a)
b)
c)