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Specifications
8 Specifications
133
Harmonic Voltage, Current and Power (including fundamental wave-
form content)
Measurement method
Per IEC61000-4-7:2002
• Harmonic voltage/current:
after harmonics are analyzed, inter-harmonic contents are
added and displayed adjacent to harmonic content, accord-
ing to harmonic order
• Harmonic power:
the value of harmonic power of each channel and aggregate
value of multiple channels are displayed (refer to the calcu-
lation formula for details - Instruction Manual (CD-R ver-
sion))
Harmonic analysis
window width
10 or 12 cycles for 50 or 60 Hz, respectively
80 cycles for 400 Hz
Harmonic analysis
window
Rectangular
Harmonic analysis
frequencies
1st to 50th orders (of 42.5- to 69-Hz fundamental waveform)
Measurement accuracy
(50/60 Hz)
• Harmonic voltage/ current:
1st to 20th order: ±0.5% rdg. ±0.2% f.s.
21st to 50th order: ±1.0% rdg. ±0.3% f.s.
• Harmonic power:
1st to 20th order: ±0.5% rdg. ±0.2% f.s.
21st to 30th order: ±1.0% rdg. ±0.3% f.s.
31st to 40th order: ±2.0% rdg. ±0.3% f.s.
41st to 50th order: ±3.0% rdg. ±0.3% f.s.
(400 Hz)
• Harmonic voltage/ current:
1st to 2nd order: ±0.5% rdg. ±0.2% f.s.
3rd to 6th order: ±1.0% rdg. ±0.3% f.s.
7th to 10th order: ±1.0% rdg. ±0.3% f.s.±0.5x(k-6)% rdg.
(k:harmonic order)
• Harmonic power:
1st to 2nd order: ±0.5% rdg. ±0.2% f.s.
3rd to 4th order: ±1.0% rdg. ±0.3% f.s.
5th to 10th order: ±1.0% rdg. ±0.3% f.s.±1.0x(k-4)% rdg.
(k:harmonic order)
However, for harmonic current and power, clamp sensor accu-
racy must be included
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