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.
--
Greetings Bertho
(disclaimers are disclaimed)
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