Hioki 3166 - Page 327

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18.3 Measurement Items and Calculations
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Table 2. Basic Calculation Formulas
Wirin
g
settin
g
Item
1-phase, 2-wire
1-phase
,
3-wire
3-phase, 3-wire
3-phase, 4-wire
2 voltage
,
2 current
2 voltage,
3 current
Voltage
U[rms]
U
1
U
1
U
2
U
1
U
2
U
1
U
2
U
1
U
2
U
3
Current
I[Arms]
I
1
I
1
I
2
I
1
I
2
I
1
I
2
I
3
I
1
I
2
I
3
Active
power
P[W]
P
1
P
1
+P
2
P
1
+P
2
P
1
+P
2
+P
3
Q
1
When not using the
reactive power meter
method
Q
1
+Q
2
Reactive
power
Q[var]
When using the reactive
power meter method
Q
1
+Q
2
Q
1
+Q
2
+Q
3
S
1
When not using the
reactive power meter
method
S
1
+S
2
S
1
+S
2
+S
3
Apparen
t
power
S[VA]
When using the reactive
power meter method
（When P>S, P=S）
Power
factor
[λ]
1
8.3 Measurement Items and Calculations
Table 2 shows the calculation formulas used for voltage, current, power
(active, reactive, apparent), and power factor.
Table 3 shows the calculation formulas used for the power integration.