64
9
Specifications
64
Chapter
9
9-1.
Specifications
Analog section
Electric power measurement section
Measurement line
Single phase two-wire
(1P2W: measure one point of both interphase voltage and phase current)
Three-phase three-wire
(3P3W: measure two points of both interphase voltage and phase current)
Input method
Voltage
Resistance dividing method
Current
DCCT method
Measurement range
Voltage
AC 400Vrms CF=1.5 Peak 600V
Current
15Arms CF=3 Peak 45A
Electric power
9999W
Frequency range
DC, 10 to 600Hz (Displayed in the average value 0.1 seconds when
DC is below 10Hz and displayed in RMS or MEAN when over 10Hz.)
Measurement accuracy
Voltage
0.5%FS
0.05%/°C
Current
1%FS
0.1%/°C
Electric power
1.5%FS
0.15%/°C
* When DC is between 10 and 300Hz
Measurement range
Voltage
400Vrms
Current
15Arms
Sampling speed
30kSPS
Analog filter
First-order low-pass filter (-6dB/oct)
480kHz
Computation function
Basic voltage computing equation
RMS value (Root mean square value)
RMS value reduced by average rectification
Simple average value
(i): Measurement point, M: Number of samples between
synchronization timings, s: Sample point number
9
Specifications
Σ
M-1
s=0
(
u
(i)
s
)
2
U
(i)
=
M
1
U
mn
(i)
=
Σ
M-1
s=0
M
u
(i)
s
1
2 2
π
U
DC
(i)
=
Σ
M-1
s=0
M
u
(i)
s
1
