Hioki PW3198 User Manual

13.10 Calculation Formula
206
Note) c: Measurement channel, k: Order of analysis, r: resistance after FFT, i: reactance after FFT
Harmonic Power (Pharm), Harmonic Reactive Power (Qharm), K Factor (KF)
Single Phase 2-
wire
1P2W
Single
Phase
3-wire
1P3W
3-Phase,
3-Wire,
2-Mea-
surement
3P3W2M
3-Phase, 3-Wire, 3-Measurement
3P3W3M
3-Phase,
4-Wire
3P4W
Pharm[W]=Pck P
1k
Pck=
U
ckr
×I
ckr
+U
cki
×I
cki
P
1k
P
2k
P
1k
P
2k
P
1k=
P
2k=
P
3k=
P
1
P
2
P
3
Psumk=
P
1k
+P
2k
Psumk=
P
1k
+P
2k
Psumk=
P
1k
+P
2k
+P
3k
Psumk=
P
1k
+P
2k
+P
3k
• The harmonic power content percentage is calculated by dividing the harmonic power component for the
specified order by the absolute value of the fundamental power component and multiplying by 100.
• For 3P3W2M and 3P3W3M connections, CH1 to CH3 values are used only for internal calculations.
Only for use with in-
ternal calculation
Qharm[var]=Qck
Q
1k
Qck=
U
ckr
×I
cki
-U
cki
×I
ckr
Q
1k
Q
2k
Q
1k
Q
2k
Q
1k=
Q
2k=
Q
3k=
Q
1
Q
2
Q
3
Qsumk=
Q
1k
+Q
2k
Qsumk=
Q
1k
+Q
2k
Qsumk=
Q
1k
+Q
2k
+Q
3k
Qsumk=
Q
1k
+Q
2k
+Q
3k
KF[ ] KF
1
KF
4
KFc=
KF
1
KF
2
KF
4
KF
1
KF
2
KF
4
KF
1
KF
2
KF
3
KF
4
KF
1
KF
2
KF
3
KF
4
• The K factor is also called the multiplication factor, and indicates the power loss using the harmonic RMS cur-
rent for the electrical transformer.
Phase System
Items
1
3
-- -
U
1kr
U
3kr
–I
1kr
1
3
-- -+ U
1ki
U
3ki
–I
1ki

1
3
-- -
U
2kr
U
1kr
–I
2kr
1
3
-- -+ U
2ki
U
1ki
–I
2ki

1
3
-- -
U
3kr
U
2kr
–I
3kr
1
3
-- -+ U
3ki
U
2ki
–I
3ki

1
3
-- -
U
1kr
U
3kr
–I
1ki
1
3
-- -– U
1ki
U
3ki
–I
1kr

1
3
-- -
U
2kr
U
1kr
–I
2ki
1
3
-- -– U
2ki
U
1ki
–I
2kr

1
3
-- -
U
3kr
U
2kr
–I
3ki
1
3
-- -– U
3ki
U
2ki
–I
3kr

k
2
I
2
ck





k 1=
50

I
2
ck
k 1=
50

------------------------------------

Hioki PW3198 Specifications

General

Brand	Hioki
Model	PW3198
Category	Measuring Instruments
Language	English