Peter Blodow wrote: > VFD's should only be used when varying frequency is desired and to > convert single phase to three phase current on a low level base, say > below 1 kW, if a three phase supply doesn't seem economical. That's what > they are made for. Analyzing costs, a decent three phase power supply > line must be cheaper and much more reliable than a VFD. > Where I work, every motor over maybe 1 Hp is run on a VFD, and they have 230 and 480 V 3-phase power available in all mechanical rooms. Mostly for energy reduction by variable speed, but it also helps their power factor. They have WALLS of VFDs in the equipment rooms.
Jon ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
