53
IM CW500-02EN
Harmonic Measurement Items
Measurement system
Digital PLL synchronization
Measurement method
Adds the intermediate harmonic component
adjacent to integer-order harmonics after
harmonic analysis and displays the result
Effective frequency range 40 to 70 Hz
Harmonics analyzed
1 to 50 harmonic order
Window span
10 cycles for 50 Hz, 12 cycles for 60 Hz
Window type
Rectangular
Number of analyzed points
2048
Analysis rate
Once every 200 ms at 50 or 60 Hz
Rms harmonic voltage Vk [Vrms]
Range
Same as rms voltage
Display digits
Same as rms voltage
Display range
Same as rms voltage
*
Percentage content 0.0% to 100.0%
Percentage to the fundamental waveform
Measurement
system
Complies with IEC61000-4-30, IEC61000-4-7, IEC61000-2-4
The analysis window span is 10/12 cycles at 50/60 Hz.
The measurement includes the intermediate harmonic component
adjacent to the harmonics being analyzed.
Accuracy
The IEC61000-2-4 Class3 accuracy is defined in the 10% to
100% input range at the 600 V range.
3% or higher for nominal voltage 100 V or higher: ±10%rdg
Less than 3% for nominal voltage 100 V or higher:
nominal voltage ± 0.3%
1000 V Range: ±0.2%rdg±0.2% rng
Equation
(
)
(
)
(
)
(
)
∑
−
=
+
+
+
=
1
1
2
2
10
10
n
i
n
k
c
r
n
k
c
ck
V
V
V
Percentage content
1
100
c
ck
V
V
×
=
c: measurement channel, k: harmonic order,
Vr: real component after taking the FFT of the voltage,
Vi: imaginary component after taking the FFT of the voltage
The measurement interval of the equation is 10 cycles. For 12
cycles, replace "10k+n" with "12k+n" in the equation.
1P2W-1 to 4
V
1k
1P3W-1, 2
V
1k
,
V
2k
3P3W-1, 2
Line voltage
V
12k
,
V
32k
3P3W3A
Line voltage
V
12k
,
V
23k
,
V
31k
3P4W
V
1k
,
V
2k
,
V
3k
Specifications