A-4-2 Feature Values Of Current System - Omron K7DD User Manual

A-4-2 Feature Values of Current System
ID Feature
R.M.S. current
6
I
RMS
Current
waveform
7
peak+
I
Peak+
Current
waveform
8
peak-
I
Peak-
Current
9 unbalance
I
Unb
Power Line Data Generator User's Manual (N233)
3P3W2M
I
RMS(1)
M-1
Σ
1
2
( )
=
I
(1)s
M
s=0
I
RMS(2)
Σ M-1
1
2
( )
=
− I − I
(1)s (2)s
M
s=0
I
RMS(3)
M-1
Σ
1
2
( )
=
I
(2)s
M
s=0
s : Sampling point
M : Number of samplings
Peak(c) ＋ =
I I
(c)s
Max. value among samplings
s : Sampling point
c : Measuring channel (1 to 3)
M : Number of samplings
Peak(c) − =
I I
(c)s
Min. value among samplings
s : Sampling point
c : Measuring channel (1 to 3)
M : Number of samplings
1 − 3 - 6β
× 100 [%]
Unb =
I
1 ＋ 3 - 6β
4 4
I1 ＋ I1 ＋ I1
(12) (23) (31)
=
β
(
2 2
I1 ＋ I1 ＋ I1
(12) (23) (31)
I1(12), I1(23), I1(31):
Fundamental wave of
current between lines
− 2×I1
2 2
=
I1 I1 ＋ I1
(12) (1) (2)
− 2×I1
2 2
=
I1 I1 ＋ I1
(23) (2) (3)
− 2×I1
2 2
=
I1 I1 ＋ I1
(31) (3) (1)
I1 I1 I1
、 、 ：Fundamental wave current
(1) (2) (3)
θ1 θ1 θ1
、 、 ：Angle defined by each fundamental
(12) (23) (31)
wave current
Wiring state
3P4W
I
RMS(c)
Σ M-1
1
2
( )
=
I
(c)s
M
s=0
c : Measuring channel (1 to 3)
s : Sampling point
M : Number of samplings
4
2
)
2
×I1 ×cosθ1
(1) (2) (12)
×I1 ×cosθ1
(2) (3) (23)
×I1 ×cosθ1
(3) (1) (31)
A Appendices
Single phase current
I
RMS(c)
Σ M-1
1
2
( )
=
I
(c)s
M
s=0
c : Measuring channel (1)
s : Sampling point
M : Number of samplings
Peak(c) ＋ =
I I
(c)s
Max. value among
samplings
s : Sampling point
c : Measuring channel (1)
M : Number of samplings
Peak(c) − =
I I
(c)s
Min. value among
samplings
s : Sampling point
c : Measuring channel (1)
M : Number of samplings
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A