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VFD Protection
Posted by avdhut from verna, IN, IN on June 26, 2009
How can I protect a VFD and all power supply cards if I have a Harmonics distoration in the plant power? Also, what is the basic schematic of power protection devices for VFD and servo drives?
An Isolation transformer is a device used to perform isolation from the noise you describe. It is a 1:1 transformer that will decouple the grounds between your existing power and the output power to your VFD's, power supply cards and servo drives. You will need some type of power distribution system (panelboard or fuses) to complete the power feeds to several devices.
