Anyone know if the make a "phase un-converter"?
I replaced the circuit breaker, filed the contacts
Don't know where to start there... Hope you're not filing the buss work?
Besides this obvious system and voltage issue you have. (Although, if you check all of your equipment, some will have dual rateings. ie 208/240 And the ones that don't should still operate ok for some time, with some efficiancy loss and higher operating amperages, until you can correct the motors.)
But, you mentioned this that caught my eye...
Things seemed to be working fine for a few weeks then my dust collector wouldn't come up to speed and everything else was running under-powered. I swear it all ran fine until I turned the machines off to answer a phone call. I metered the outlets and the panel and I get 122 volts per leg, but only 214 across the legs.
FYI that voltage sounds fine... (for 3 phase wYe) Assuming you checked this voltage "no load"? Check a piece of equipment that your not really attached to,breifly,
(after start up) "under-load", and you get any one phase at higher >5%, or 2 <10% at the panel. Then you may have different problems! For starters... severe un-balance, systems/transformer over-load, or neutral/phase loss. If this happened all at once, after everything 'seemed to work fine', then something is up!
Not sure what your electrical expertize may be? But it sounds like you need a good "3 phase and motors troubleshooting" guy.
[This message has been edited by e57 (edited 08-09-2004).]