Delta VFD-ED Series User Manual

Appendix A. EMC Standard Installation GuideVFD-ED
A-20
AC Motor Drives with Built-in Filter
1. Since interferences are suppressed by installing an earthed capacitor in the filter, the amount of
current to ground (leakage current) could result in electric shocks to personnel or the power
system. Please be aware of this problem.
2. Since the leakage current to ground can be high, it is crucial to implement protective earthing to
prevent electrical shocks.
Filter Installation (With and Without)
< 15 m @ 60 Hz with EMC Filter < 15 m @ 60 Hz without EMC Filter
Zero Phase Reactor (Choke)
Interferences can also be suppressed by installing a zero phase reactor at the power supply side
and/or the AC Motor Drive’s output, depending on where the interference is. Since currents are large
at the power input and the AC Motor Drive’s output, please carefully select the magnetic core with
Figure A-21
Figure A-22
Figure A-23

Delta VFD-ED Series Specifications

General

Brand	Delta
Model	VFD-ED Series
Category	DC Drives
Language	English