Thd V - In Function A - Fluke 1745 User Manual

THD V – In Function A
THD
Function A:
V RMS value of harmonic frequency #n.
n:
V RMS value of the fundamental frequency.
1:
THDV: total contents of harmonics of the line power voltage as a percentage
of the fundamental.
This algorithm is according to EN 61000-4-7.
THD of currents:
THDI
Function A:
I RMS value of harmonic frequency #n.
n:
I RMS value of the fundamental frequency.
1:
THDI: total contents of harmonics of the current as a percentage of the
fundamental.
50
∑
2
V
n
n 2
V
V
1
50
∑
2
I
n
n 2
I
1 and
Power Quality Logger
Using the 1745 Power Quality Logger
50
∑
THDI A
n
2
I
n
2
33