
AFQ-4W
34 Instruction Manual
Fundamental component (
U
1
o
I
1
)
: A sine wave component of order 1 of the
Fourier frequency serial development equal to the original periodic wave.
Harmonic component (
U
n
o
I
n
)
: A sine wave component of order over 1 of
the Fourier frequency serial development a whole multiple of the original
frequency.
Individual distortion rate (
U
n
%
o
I
n
%)
: A ratio in % between the RMS value
of the voltage or harmonic current (U
n
o I
n
) and the RMS value of the
fundamental component (U
1
o I
1
).
Equation 3: Individual distortion rate
True root mean square value (TRMS)
: The square root of the sum of the
squares of all components forming the wave.
Equation 4: True root mean square value
Harmonic content
: The difference between the total voltage or current and
the corresponding fundamental value.
Harmonic distortion rate (THD)
: The ratio between the RMS value of the
harmonic content of the voltage and/or current and the value of the
fundamental component.
Equation 5: Harmonic distortion rate.
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