Delta EB3000 Series User Manual page 469

Appendix A. EMC Standard Installation GuideEB3000
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
150
100
50
0
-50
-100
-150
0 50 100 150
Without Reactor
200 250 300 350 400 450 500
Figure A-29
With Reactor
150
100
50
0
-50
-100
-150
0 50 100 150
Figure A-30
A-22
200 250 300 350 400 450 500