YOKOGAWA CW120 - Page 151

14-3
IM CW120-E
Specifications
14
14.1 Specifications of CW120/121
Reactive power and power factor
1∅2W
1∅3W
3∅3W
3∅4W
Calculation
range
Display
resolution
Q= ((VA)
2
– P
2
)
Q i=
((VAi)
2
– Pi
2
)
i=1, 2
ΣQ=Q1+Q2
Q i=
((VAi)
2
– Pi
2
)
i=1, 2
ΣQ=Q1+Q2
Q i=
((VAi)
2
– Pi
2
)
i=1, 2, 3
ΣQ=Q1+Q2+Q3
The rated value depends
on the voltage and current
ranges.
Same as active power
VA=V × A
VAi=Vi × Ai
i=1, 2
ΣVA=VA1+VA2
VAi=Vi × Ai
i=1, 2
ΣVA= 3/2(VA1+VA2)
VAi=Vi × Ai
i=1, 2, 3
ΣVA= VA1+VA2+VA3
The rated value depends on
the voltage and current ranges.
Only calculated internally;
not displayed nor saved as data.
P / VA
ΣP / ΣVA
–1 to +1
±1.000
Note 1: For distorted or unbalanced wave inputs, there may be discrepancies between the CW120/121 and other
instruments that operate based on different measurement principles.
Note 2: The plus/minus sign is displayed by multiplying the polarity obtained based on the varmeter method.
Reactive Power
(Note 1)
Power Factor
(Note 2)
Apparent Power
(5) Electric Energy Measurement
Measured parameters Active electric energy, regenerative electric
energy (not displayed, only saved as data)
Measurement accuracy Measurement accuracy for active power ±1 dgt
(with standard settings)
Integration function settings
Start/stop Manual, specified time, external trigger (remote
control)
Output interval Can be selected from 1, 2, 5, 10, 15, and 30
seconds, 1, 2, 5, 10, 15, and 30 minutes, and 1
hour.
Display digits Automatic decision based on the rated power.
The maximum resolution can be set.