Delta 450 phase conversion

[1bigdog2]

Can the Deltaweld 450 be converted to a single phase machine? We have a rotary phase converter,but everyone has said they dont weld well off a converter. thanks for anyhelp.

[cruizer]

Simply NOT happening

[Meltedmetal]

Deltaweld 450 is 3 phase only. Checkout the manual on this site for that machine. Input current is 81 amps @ 200v to 28 amps @ 575volts. I'm pretty sure your phase convertor is not even remotely close to being up to that job. So yeah, what Cruizer said "Simply NOT happening "
Go to plan "B"
Good luck---Meltedmetal

[jpence38]

Simply NOT happening

Cruizer,
just curious as to why not. Is it that the phase converter puts out "dirty" power and the deltaweld will not run properly???
If it is just a supply issue as far as enough power, it is fairly simple to find a 30 HP 575V 3 phase motor to use for conversion.
I plan on making a converter to run a dimension or deltaweld and am curiuos before I waste time and money

[Meltedmetal]

If it is just a supply issue as far as enough power, it is fairly simple to find a 30 HP 575V 3 phase motor to use for conversion.

True enough Jim but how easy is it to find a 50 HP single phase motor to drive it? And what kind of single phase entrance do you have to run it?
Meltedmetal

[cruizer]

The problem is with the circuit boards which pulls synchronized voltages off the transformers to fire the SCRS in the rectifier. All 3 of the phases must be in perfect syncronization with each other, or you'll poof the main board, and likely a set of secondary transformers.

Plus they need a maintained 60hz to properly run. when loaded the rotary ones tend to bog down, thus no 60HZ, may drop down to 40 or 50 hz, which will fry everything.

The only unit you may be able to get away with is a Miller SRH stick machine on a rotary, Even then if you bog down, you'll fry your primary transformer.

To get away from this you'd need a rather large converter/motor that will handle the load.

A high powered $$$ digital converter might be a better bet, though there are alot of great single phase machines around that might betterserve your purpose.

[jpence38]

Thanks for the info. Glad I found out beforehand. The reason I was thinking of going with the 3 ph. is that I can get practically new machines for next to nothin'. Looks like I will just stick with the 1 ph.