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1744/1743
Users Manual
44
Total active power of the
fundamental for three
phases
∑
=
⋅=
3
1
11
k
ktotal
PhPh
Apparent power of the
fundamental per phase.
Basic value for 200 ms.
11
.1 IVSh
bas
=
Apparent power of the
fundamental per phase per
interval
∑
=
⋅=
M
j
j
bas
Sh
M
Sh
1
1
1
1
Power factor of the
fundamental per phase
1
1
1
1
cos
1
Qh
Qh
Sh
Ph
total
⋅=
ϕ
Total power factor on all
three phases
total
total
total
total
Qh
Qh
ShShSh
Ph
1
1
111
1
cos
321
1
⋅
++
=
ϕ
Active energy per phase
and total
Active power accumulated on each logging interval
Sign of PF, tan φ, cos φ:
• Sign “+” : Q positive (“inductive”)
• Sign “–” : Q negative (“capacitive”) independent of the sign of active
power P
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