Fluke 434-II User Manual page 157

VA fund - Fundamental Apparent Power (S)
Fundamental apparent phase power:
Fundamental apparent system power Υ:
Apparent system power is NOT the sum of the phase powers!
Fundamental apparent system power Δ:
var –Fundamental Reactive Power (Q)
For reactive power only the fundamental power is of interest.
Fundamental reactive phase power:
Fundamental reactive system power Υ and Δ:
System reactive power is NOT the sum of the phase powers!
VA Harmonics Power (Dh)
Harmonics powers are calculated using the full apparent power S
apparent power S
Harmonic distortion power:
Harmonic distortion system power Υ and Δ:
Harmonic distortion system power is NOT the sum of the phase powers!
VA Unbalance Power (Du)
Unbalance powers cannot be measured per phase. Unbalance is only measured on system
level.
Unbalance is calculated from the fundamental system apparent power and the positive
sequence component of the system apparent power.
Unbalance system power Υ and Δ:
Power Factor (PF)
Power Factor indicates system effectiveness at full bandwidth and is calculated from full
spectrum power (up to 50
Power factor:
System power factor Υ and Δ:
info@Fluke-Direct.ca
.
1X
th
harmonic) and apparent power.
PF =
X
PF =
P
Fluke-Direct
= ⋅
S U I
1 X 1 X 1 X
+ = ⋅ + ⋅ +
S 3 U I
1Y 1 1
+ + +
= ⋅ ⋅
S 3 U I
Δ
1 1 1
(
= ⋅ ⋅ ϕ
Q U I sin u
1 X 1 X 1 X
(
+ = ⋅ + ⋅ + ϕ +
Q 3 U I sin u
1 1 1 1
and the fundamental
X
= −
2 2
Dh S S
X X 1 X
= −
2 2
Dh S S
1
= − +
2 2
Du S S
1 1
P S
X X
S
.ca
Appendices
Measuring Methods
)
− ϕ
i
1 X 1 X
)
− ϕ +
i
1
1.800.868.7495
A
A-5