Re: Running a Bridgeport Interact 1 Mk1 on single phase 240v

Jon

I'm confident the VFD is correct for the spindle motor so thats out
the way I'll do this no matter what, if nothing else is saves on
belt and brake wear but is sooo much quieter.

"No, that is not correct. As long as it is a single transformer
primary "it has no idea what the phase relationship to anything else
is. If it only has wires connected to the mains, and no neutral,
then it is single phase, by definition. it knows no difference,
anymore than an ordinary light bulb would know if wired across two
line terminals of a 3-phase system"

Now this seems to make sense but you'll have to help me get my head
round this cause this is one of those Ive just learnt something very
usefull moments here!

If the transformer is connected to 2 420v phases then at any one
time in the 50hz cycle are you saying the potential differance and
wave form is the same as between a netural and 240v single phase? If
so this answers a vast number of questions for me!

If the above is correcy I am out to get a step-down transformer to
get 3KVA reverse it and get back up to 420, Jon you guessed right
the 420 3-phase mains is standard here in UK thats a great solution.

Thanks for your help

Graham