Delta VFD055ED43S User Manual

Appendix A. EMC Standard Installation GuideVFD-ED
A-23
AC Reactor
Installed in series with the power supply and is effective in reducing low order current harmonics.
Features of an AC reactor include:
1. Reduces the harmonic currents to the AC Motor Drive and increases the impedance of the power
supply.
2. Absorbs interferences generated by surrounding devices (such as surge voltages, currents, and
mains surge voltages) and reduce their effect on the AC Motor Drive.
3. Increases the power factor.
DC Reactor
A DC-Reactor is installed between the rectifier and the DC-bus capacitor to suppress harmonic
currents and to achieve a higher power factor.
Current Wave Diagrams
Without Reactor
0 50 100 150
200 250
300
350 400 450 500
-150
-100
-50
0
50
100
150
With Reactor
0 50 100 150
200 250
300
350 400 450 500
-150
-100
-50
0
50
100
150
Figure A-29
Figure A-30

Delta VFD055ED43S Specifications

General

Brand	Delta
Model	VFD055ED43S
Category	DC Drives
Language	English