User manual
PQM-702, PQM-703 Operating Manual
54
Displacement power fac-
tor
cos
DPF
-
where
U1
is an absolute angle of the fundamental com-
ponent of voltage U
A-N
I1
is an absolute angle of the fundamental component
of current I
A
Tangent
tan
-
where: Q = Q
B
when Budeanu method was chosen,
Q = Q
1
when IEEE 1459 method was chosen,
Harmonic components of
voltage and current
U
hx
I
hx
V
A
method of harmonic subgroups according to IEC 61000-
4-7
x (harmonic order) = 1..50
Total Harmonic Distortion
for voltage, referred to
the fundamental compo-
nent
THDU
F
-
where U
h
is the h-th harmonic of voltage U
A-N
U
1
is fundamental component of voltage U
A-N
Total Harmonic Distortion
for voltage, referred to
RMS
THDU
R
-
where U
h
is the h-th harmonic of voltage U
A-N
Total Harmonic Distortion
for current, referred to
the fundamental compo-
nent
THDI
F
-
where I
h
is the h-th harmonic of current I
A
I
1
is fundamental component of current I
A
Total Harmonic Distortion
for current, referred to
RMS
THDI
R
-
where I
h
is the h-th harmonic of current I
A
Interharmonic compo-
nents of voltage and cur-
rent
U
ihx
I
ihx
V
A
method of interharmonic subgroups
acc. to IEC 61000-4-7
x (interharmonic order) = 0..50
(sub-harmonic also includes the 5 Hz bin)
Total Interharmonic Dis-
tortion for voltage, re-
ferred to the fundamental
component
TIDU
F
-
where U
ih
is the ih-th interharmonic of voltage U
A-N
U
1
is fundamental component of voltage U
A-N
Total Interharmonic Dis-
tortion for voltage, re-
ferred to RMS
TIDU
R
-
where U
ih
is the ih-th interharmonic of voltage U
A-N
Total Interharmonic Dis-
tortion for current, re-
ferred to the fundamental
component
TIDI
F
-
where I
ih
is ih-th interharmonic of current I
A
I
1
is fundamental component of current I
A
Total Interharmonic Dis-
tortion for current, re-
ferred to RMS
TIDI
R
-
where I
ih
is ih-th interharmonic of current I
A
Voltage crest factor
CFU
-
where the operator
expresses the highest abso-
lute value of voltage U
A-N
samples
i = 2048 for 50 Hz and 60 Hz