Hioki 3390 - Page 179

10.5 Calculation Formula Specifications
171
10
10
Chapter 10 Specifications
(i) : ..........Measurement channel
k :............Order of analysis
K : ...........Maximum analysis order (depending on sync frequency)
1P2W 1P3W 3P3W2M 3P3W3M 3P4W
Harmonic volt-
age content
Harmonic cur-
rent content
Harmonic
power content
THD Voltage
Percentage
THD Current
Percentage
Items
Phase
System
Uhd
ki()
U
k
U
1
------
100×=
Ihd
ki()
I
k
I
1
----
100×=
Phd
ki()
P
k
P
1
------
100×=
Uthd
i()
U
k
()
2
k2=
K

U
1
-----------------------------
100×=
(with THD-F setting), or
(with THD-R setting)
U
k
()
2
k2=
K

U
k
()
2
k1=
K

-----------------------------
100×
Ithd
i()
I
k
()
2
k2=
K

I
1
---------------------------
100×=
(with THD-F setting), or
(with THD-R setting)
I
k
()
2
k2=
K

I
k
()
2
k1=
K

---------------------------
100×
Example: for harmonic voltage
I
II, III
IV
+
90°
-90°
+180°
0°
U
kr i()
U
ki i()
–
----------------


1–
tan 180 ° +
U
kr i()
U
ki i()
–
----------------


1–
tan
U
kr i()
U
ki i()
–
----------------


1–
tan 180 ° –
U
kr i()
0 U
kr i()
0 <,=
U
kr i()
0 U
kr i()
0 >,=
U
kr i()
0 U
kr i()
,< 0 =
U
kr i()
0 U
kr i()
, 0 ==
Phase reference
Imaginary