Fluke 1745 User Manual page 53

Active power of logging
interval per phase
Total active power on all
three phases
Absolute value of the
active power per interval
per phase
Sum of the absolute
values of the active
power on all three phases
Apparent power based on
RMS values of voltage
and current. Basic values
on 200 ms per phase
Apparent power per
logging interval per phase
Ph 1 P
bas 1
1 M
∑
P P
bas
M
j 1
P to 200 ms value
bas j
M: Number of 200 ms intervals per logging
intervals
3
∑
P P
total k
k 1
P : Active power of the phase
k
k: Phase (k = 1, 2, 3)
1 M
∑
P P
betr
M
j 1
1 M
∑
P
betr
total
M
j
S V . I
bas bas bas
1 M
∑
S S
bas
M
j 1
S : 200 ms value
bas j
M: Number of 200 ms intervals per logging
intervals
Power Quality Logger
Measurement Theory
j
bas
j
P P
bas bas
1 2
1
j
P
bas
3
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