
Interference Caused By Vfds
#1
Posted 30 December 2007 - 07:50 AM
I have recently got quite involved in VFD installations where there is significant interference caused by the VFDs and in some cases, the induced voltage is so great that it has caused damage to other equipment.
In most situations, the problem has been traced to poor installation techniques.
If the VFDs are installed in exact accordance to the manufacturers instructions, the interference will be minimized, however in many cases, the manufacturers recommendations are very hard to follow.
I have written a couple of suggested codes of practice for the installation of VFDs on pumps.
You can find these at http://www.LMPhotoni.../vsd/vsd_05.htm
Any comments and/or suggestions are welcome.
Best regards,
Mark Empson | administrator
Skype Contact = markempson | phone +64 274 363 067
LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters
#2
Posted 30 December 2007 - 08:03 AM
If any cable is to be run have it on the mains rather than the motor side
#3
Posted 02 January 2008 - 02:00 AM
Yes, that is a good point, minimize the length of cable on the output of the drives.
Best regards,
Mark

Mark Empson | administrator
Skype Contact = markempson | phone +64 274 363 067
LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters
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