Hioki PW3336-01 - Current Channel and Sum Value Calculation Formulas

5.5 Calculation Formulas Specifications
163
(2) Current basic calculation formulas
Item (RECTIFIER) Calculation formulas
RMS value (AC+DC)
Simple average value (DC)
AC component RMS value (AC)
Fundamental wave component RMS
value (FND)
I
1(i)
from harmonic calculation formula
Waveform peak value
Displays the maximum absolute value from the above with its polarity.
Total harmonic distortion
I
thd(i)
from harmonic calculation formula
Ripple rate
Crest factor
(i): Measurement channel; M: Number of samples between synchronization timing points; s: Sample point number
∑
1M
0s
2
s)i()i(
)i(
M
1
I
−
=
=
∑
1M
0s
s)i()i(DC
i
M
1
I
−
=
=
2
)i(DC
2
)i()i(AC
)I()I(I −=
I
pk(i)
=
I
pk
+ (i) : i(i)s Maximum value from M values
I
pk
- (i) : i(i)s Minimum value from M values
100
|I|2
|)II(|
I
)i(dc
)i(pk)i(pk
)i(rf
×
×
=
+ −
−
DC
)i(
)i(pk
)i(cf
I
I
I
=
Current channel and sum value calculation formulas
Wiring
1P2W 1P3W 3P3W 3P3W2M 3V3A 3P3W3M 3P4W
All channels Sum values
See note.
Basic calculation
formula
I
(i)
Note:
Above applies to RMS values (AC+DC).
For simple average values (DC), AC component RMS values (AC), and fundamental wave component RMS values
(FND), replace I
(i)
with I
DC(i)
, I
AC(i)
, and I
1(i)
.
)II(
2
1
I
)2()1(sum
+=
)III(
3
1
I
)3()2()1(sum
++=