Fluke NORMA 4000 Operator's Manual page 137

Active power
[1]
Reactive power
[2]
Apparent power
[3]
Corrected power
[4]
Impedance
Serial components
Parallel components
Total power factor
[5]
Total phase shift
Energy by the integration
function for P (separately
for positive and negative P)
Frequency of the selected
channel
(voltage or current
1...3...6)
Interval of measurement
Time since start (reset)
Notes:
[1] Q1 and Q2 of a W2-system are internal values:
[2] S1 and S2 of a W2-system are internal values:
[3] The apparent power of W2 is calculated from 2 voltages and 2 currents in contrast to W3 system. This may lead to differences
between W3 and W2 measurements in case of unbalanced system/loads.
[4] The calculated values of total impedances represent average phase impedances on a symmetrical 3-wire wye-connected network
corresponding to the measured total phase-to-phase voltages U
The phase shift ϕ for broad-band signals is in fact an artificial result. It conforms to a physical angle for sinusoidal signals only.
[5]
Often, it makes sense to use ϕ
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λ
ϕ
E
f
XU
t
AVG
t
RAVG
,
= 2 − 2 =
Q
Q S P
1 1 1 2
,
= ⋅ ⋅
S U I 3 2 S
1 13 1
and active and reactive power values P and Q
Δ
, the phase shift of the fundamental voltage to the fundamental current, instead.
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www.
Measured Values Computation
P
=
S
= λ
arccos

= ⋅ ⋅
u i dt
or f
XI
2 − 2
S P
2 2
= ⋅ ⋅
U I 3 2
2 23 2
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