Fluke 1744 User Manual
Power Quality Logger
Logger Parameters with Function A
41
Logger Parameters with Function A
The following are the parameters of the 1744/1743 Logger with function A.
TRMS value of voltage
and current. Basic values
on 200 ms per phase.
and current. Basic values
on 200 ms per phase.
∑
=
=
N
i
i
bas
V
N
V
1
2
.
1
∑
=
⋅
=
N
i
i
bas
I
N
I
1
2
1
N: Number of samples in 200 ms intervals (2048)
RMS value of voltage and
current per logging
interval per phase
current per logging
interval per phase
∑
=
=
M
j
basj
RMS
V
M
V
1
2
.
1
∑
=
⋅
=
M
j
j
bas
RMS
I
M
I
1
2
1
M: Number of 200 ms intervals per logging interval
Active power calculated
from FFT from samples
of voltage and current.
Basic value on 200 ms per
phase.
from FFT from samples
of voltage and current.
Basic value on 200 ms per
phase.
n
n
n
n
I
V
P
ϕ
cos
.
.
=
V
n
: RMS value of voltage harmonics of order n
I
n
: RMS value of current harmonics of order n
n: Order of the harmonics
φ
n
: Phase angle between current and voltage
harmonics of order n
P
n
: Harmonics of the active power of order n
Fundamental
∑
=
=
50
1
n
n
bas
P
P
1
1
P
Ph
bas
=