Hioki PW3198 - Page 211

13.10 Calculation Formula
205
10
13
Chapter 13 Specifications
Note) c: Measurement channel, k: Order of analysis, r: resistance after FFT, i: reactance after FFT
However, for 60 Hz measurement, the value 10 in the formula is replaced with 12.
Iiharm[Arms]=Ick I
1k
I
4k
I’ck=
Ick=
I
1k
I
2k
I
4k
I
1k
I
2k
I
4k
I
1k
I
2k
I
3k
I
4k
I
1k
I
2k
I
3k
I
4k
• The values 3 and -3 in the formula apply to 50 Hz measurement and are replaced with 4
and -4 for 60 Hz measurement. In the formula, k = 0.5, 1.5, 2.5, 3.5, ...
• For 60 Hz measurement, the value 10 in the formula is replaced with 12.
• The inter-harmonic current content percentage is calculated by dividing the inter-harmonic
current component for the specified order by the fundamental current component and mul-
tiplying by 100.
Harmonic Voltage (Uharm), Harmonic Current (Iharm), Inter-harmonic voltage
(Uiharm), Inter-harmonic current (Iiharm)
Single Phase 2-wire
1P2W
Single
Phase
3-wire
1P3W
3-Phase,
3-Wire,
2-Measure-
ment
3P3W2M
3-Phase,
3-Wire,
3-Measure-
ment
3P3W3M
3-Phase,
4-Wire
3P4W
Phase System
Items
Ickr
2
Icki
2
+
I
2
c 10kn+10
n
3–=
3
