VLT
®
Soft Starter Pocket Guide 21
Harmonics: Are harmonics an issue for
soft starter applications?
Harmonics are voltages and currents that create unwanted heating
in motors, cables and other equipment. Harmonics may also disrupt
operation of other electrical and electronic equipment.
Soft starters generate very low levels of harmonics, only during starting
or soft stopping. According to IEC 60947-4-2 (8.3.2.1.1), “harmonic
emissions are of short duration during starting, and there are no
signifi cant emissions in the FULL-ON state”. No special considerations
or fi ltering are required for soft start applications.
MCD3000 and MCD 200 soft starters comply with the EMC
directive on radiofrequency emissions and immunity.
To Next Page
Loading...
Need help?
General
