The filter is 115/250v so it could go on the upstream side of the control transformer. I'm not understanding the ground part. I thought all grounds go to a common point? Drawing tomorrow...
JT On 12/25/2015 5:05 PM, Bertho Stultiens wrote: > On 12/25/2015 11:51 PM, John Thornton wrote: > [snip] >> So from the distribution blocks the >> 240v goes to the VFD filter and the control transformer. I have a second >> filter for the 120v side, should that go just after the control transformer? > Could you make a (quick and dirty) drawing? > > The mains filter should normally be on the primary side, not the > secondary. A mains filter is to prevent injection back into the grid. > > If I understand you correctly, you want to do following: > > > [240V mains]--+--[vfd filter]--[VFD controller]--[spindle] > | > +--[mains filter]--[ctl transformer]--[control] > > The interesting part in now how earth is connected in the "VFD > controller" and the "control". If the GND of both are connected to earth > (internally), then you will create a loop and all hell may break loose. > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
