robertlaurenson
Member
Hello all, I have discussed my power install before as i am sure a lot of you will remember as it is quite different to a normal setup. I have a split phase / Bi Phase system, 2 phases coming into the workshop from a center tapped transformer. 240v phase to neutral and 480 phase to phase. I have been looking at machinery and have bought some of the equipment already which is running on VFD's so not an issue power wise.
I now need to get a large Mig welder to complete the set, most of them as soon as you go over 250A they have to be 3 phase.
My question is relating to the inverter type welders on the market, i am not sure if what i am going to ask is even remotely possible but with my minimal knowledge on these welders and what i can find on the internet it seems like it may be possible.
My question is as follows, can i take the 2 legs i have with 480v between them, say put them in L1 and L2 of the welder and then put a series of links in between L1, L2 and L3 to in effect make the machine think i am powering it from 3 phase. i.e it will see power across all phases. the only thing with this is the phases wouldn't be balanced 120 degrees apart but i am not sure the machine would be this "clever" and would more be looking for a voltage across each leg.
In my simple understanding of the way these inverters work they take in a "3 phase" supply and convert it to DC and output it through a second inverter in the machine. Any help on this would be greatly appreciated. It is a big outlay to buy a 3 phase welder of this size and not much point doing it if this wont work.
My other possible options are a Rotary converter, or a Drives Direct digital one.
Thanks in advance Robert
I now need to get a large Mig welder to complete the set, most of them as soon as you go over 250A they have to be 3 phase.
My question is relating to the inverter type welders on the market, i am not sure if what i am going to ask is even remotely possible but with my minimal knowledge on these welders and what i can find on the internet it seems like it may be possible.
My question is as follows, can i take the 2 legs i have with 480v between them, say put them in L1 and L2 of the welder and then put a series of links in between L1, L2 and L3 to in effect make the machine think i am powering it from 3 phase. i.e it will see power across all phases. the only thing with this is the phases wouldn't be balanced 120 degrees apart but i am not sure the machine would be this "clever" and would more be looking for a voltage across each leg.
In my simple understanding of the way these inverters work they take in a "3 phase" supply and convert it to DC and output it through a second inverter in the machine. Any help on this would be greatly appreciated. It is a big outlay to buy a 3 phase welder of this size and not much point doing it if this wont work.
My other possible options are a Rotary converter, or a Drives Direct digital one.
Thanks in advance Robert
