Feature Values Of Power Consumption, Power Factor And Power Frequency - Omron K7DD User Manual

A-4-3 Feature Values of Power Consumption, Power Factor and Power
Frequency
ID Feature
Active power
137
P P
Act =
Reactive
138 power
P
React =
Apparent
139 power
P
Aprnt =
Power factor
140
PF
Power
141 frequency
FREQ
=
Power Line Data Generator User's Manual (N233)
3P3W2M
P = P
＋ P
1 2
Σ M-1
1 1
( )
× I
=
V
＋
(12)s (1)s
M M
s=0
s : Sampling point
M : Number of samplings
Q = Q
＋ Q
1 2
2 2 2
=
S − P ＋ si S − P
si
1 1 2
* The polarity sign "si" indicates the
lag/lead polarity, with positive in lag
and negative in lead.
<How to calculate polarity sign>
Calculate the primary harmonic reactive
Q
power (k=1) using the equation below, and
add a sign opposite to the one derived.
× Iki
=
Qk Vkr Vki
−
(1) (12) (1)
( ) × Iki
=
Qk Vkr
− −
(2) (23) (2)
k : Harmonic order
3
(S )
=
＋ S
S
1 2
2
3
{(V )
=
× I
S
2 RMS(12) RMS(1)
＋ (V
=
PF
* The polarity sign "si" is obtained from the sign of reactive power Q.
f = 1/T
T: Cycle (current for CH1)
f
Wiring state
P = P
＋ P
1 2
Σ M-1
1
(
=
V
Σ M-1
M
( )
× I
s=0
V
−
(23)s (2)s
s=0
s : Sampling point
M : Number of samplings
* The voltage should be phase voltage.
Q = Q
＋ Q
1
2 2
=
S − P
si
2 1
* The polarity sign "si" indicates the
lag/lead polarity, with positive in lag and
negative in lead.
<How to calculate polarity sign>
Calculate the primary harmonic reactive
power (k=1) using the equation below, and
add a sign opposite to the one derived.
× Ikr
(12) (1) =
Qk Vkr
(c) (c)
( ) × Ikr
Vki
−
(23) (2)
c : Measuring channel (1 to 3)
k : Harmonic order
=
S S ＋ S ＋ S
1 2
(V
=
RMS(1)
)}
× I
* The voltage should be phase voltage.
RMS(23) RMS(2)
P
si
S
A Appendices
3P4W
＋ P
3
Σ M-1
1
) ( )
× I × I
V
＋
(1)s (1)s (2)s (2)s
M
s=0
M-1
Σ
1
( )
× I
V
＋
(3)s (3)s
M
s=0
＋ Q
2 3
2 2 2 2 2
＋ si S − P ＋si S − P
1 2 2 3 3
× Iki × Ikr
Vki
−
(c) (c) (c)
3
) ＋ (V )}
× I × I
RMS(1) RMS(2) RMS(2)
＋ (V )}
× I
RMS(3) RMS(3)
Single
phase
current
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