Hioki PW3336 - Page 171

5.5 Calculation Formulas Specifications
165
Item
Wiring
Apparent power Reactive power
All channels 1P2W
Basic calculation formula
S
(i)
Basic calculation formula
Q
(i)
Sum values
1P3W
3P3W
3P3W2M
3V3A
3P3W3M
3P4W
Item
Wiring
Power factor
Phase angle
All channels 1P2W
Basic calculation formula
λ
(i)
Basic calculation formula
ϕ
(i)
Sum values
1P3W
3P3W
3P3W2M
3V3A
3P3W3M
3P4W
The polarity symbol si
sum
is acquired from the Q
sum
symbol.
)2()1(sum
SSS +=
)2()1(sum
QQQ +=
)SS(
2
3
S
)2()1(sum
+=
)SSS(
3
3
S
)3()2()1(sum
++=
)3()2()1(sum
SSSS ++=
)3()2()1(sum
QQQQ ++=
sum
sum
sumsum
S
P
si
λ =
sumsumsum
λcossiφ
1−
=
When P
sum
≥ 0
(0° to ±90°)
−
−
sum
1
sumsum
λcos180siφ =
When P
sum
< 0
(±90° to ±180°)