Hioki 3169-20 - Page 212

204
Power Factor
The absolute values of power factor for every one cycle are aver-
aged within the interval period.
Frequency
The frequency values for every one cycle are averaged within the
interval period.
N :
The number of the data in the interval period
Un :
The voltage RMS value of every one cycle
In :
The current RMS value of every one cycle
Pn :
The active power value of every one cycle
Qn :
The reactive power value of every one cycle
Sn :
The apparent power value of every one cycle
PFn :
The power factor value of every one cycle
Fn :
The frequency value of every one cycle
si :
Polarity of lead or lag
(
lag
:
no indication
,
lead
: -)
By assuming when
Qn
0,
Q
; or when
Qn < 0
,
Q’
;
No indication for si when
ΣQ
Σ|Q’|
in the interval period.
“-“ is indicated for si when
ΣQ < Σ|Q’|
.
PF AVE si
N
PFn
n
N
_ =
∑
=
−
1
0
1
FAVE
N
Fn
n
N
_ =
∑
=
−
1
0
1