Appendix A – Technical Data
ACA 635 IGBT Supply Sections
A-5
Harmonic Distortion
This table gives total harmonic distortion (THD) of the ACA 635.
Definitions
THD is calculated as follows: ratio of the rms value of the harmonics (n
= 2...40) to the rms value of the fundamental. The voltage THD
depends on the short-circuit ratio. The spectrum of the distortion also
contains interharmonics. See also
.
Ratio of the short-circuit power of the supply network (source) to the
fundamental apparent power of the ACA 635 at point of common
coupling:
R
sc
=
S
cc
/
S
equ
, where
S
cc
= short-circuit power at point of common coupling (PCC),
S
equ
= apparent power of the equipment calculated with rated rms line
current.
Switching Frequency
2 kHz (average).
Ambient Conditions
See
ACS 600 MultiDrive Safety and Product Information
(EN code:
63982229) guide or
ACx 6x7 Hardware Manual
(EN code: 61329005).
Efficiency
97 % at nominal power level
THD
Voltage
%
THD
Current
%
R
sc
8
4
20
2
4
100
THD
I
I
n
=
æ
è
ç
ö
ø
÷
å
1
2
2
40
Total Harmonic Distortion:
I
n
n
th
harmonic component
I
1
fundamental current
Содержание ACS 600 MultiDrive
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