YOKOGAWA CW240

17-9
IM CW240E
CW 240 Specifications
17
Measurement Item Equations
Electric Power
Total Power Factor
Not using the reactive power method
Using the reactive power method
Pn = UnrInrUniIni
Electric Power nth Order
Content
Total RMS Value
Total Electric Power Valu
 100%
fundamental wave active power
nth order active power
∑ U =
∑ Un
2
50
n=1
∑ P =
∑ Pn
50
n=1
∑ I =
∑ In
2
50
n=1
∑ Pn
50
n=1
(
∑ Pn
)
2

(
∑ Qn
)
2
50
n=1
50
n=1
∑ P
∑ U  ∑ I
Harmonic Equations for Each Wiring
Measurement Item
Wiring
Single Phase 2 Wire
Single Phase 3 Wire
Voltage RMS Value
U1n
U1n
U2n
Current RMS Value
I1n
I1n
I2n
I3n
(When using 3 current)
Electric Power
Pn  Unr  Inr  Uni  Ini Pn  P1n  P2n
Reactive Power
*1
Qn  Unr  Ini  Uni  Inr Qn  Q1n  Q2n
Apparent Power
*1
Sn  Un  In Sn  S1n  S2n
17.1 CW 240 Specifications