3 phase wiring advice

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Hi there, any help is appreciated. We just moved shop and the mig is not like it was at the old shop. Its like inductance has gone down. Im questioning if the shops 3 phase wiring could cause this. I know it is out of phase with the old shop as the drop saw went backwards when turned on. The sparky swaped the phases on the saw to fix it. I question if this is the mig problems or just me going loopy.
Reply:Sorry the machine is a UniMig 345s
Reply:Unlike the motor for your saw, the mig should not care about phase order / rotation.  I reversed a couple poles on my MM300 just to check and it made no difference.  It is more likely that any issues you are seeing are caused by some other change.  Could be feed wire size, feed wire length, feed transformer issues or some damage to the machine that could occur when moved.  If you are getting unstable feed voltage while welding, I am sure that would cause your issues.Multimatic 200Ellis 1800Haberle S225 9" cold sawMM 300;  Spoolmate 30A w/ WC-24TB 302GDynasty 280 DX Tigrunner
Reply:

Originally Posted by ShaSteve

Sorry the machine is a UniMig 345s
Reply:If the service is high leg delta you may have an issue with control voltage.   Can you check the voltage leg to leg?SteveSteve from SoCal now in HutchMiller Dynasty 300DX Coolmate3 Speedway TorchMiller XMT 450 MPa plus with D-74 MPa Plus Miller Bobcat 225 NTHypertherm Powermax 45And a whole bunch of machines
Reply:I think you are most likely to find that the voltage in the new shop is lower than it was in the old shop. Problem with that theory is that all I could find online says that all 3 phase power in Australia is 400-415 volts.GravelThe difference between theory and practice is that in theory there is no difference.
Reply:

Originally Posted by Gravel

I think you are most likely to find that the voltage in the new shop is lower than it was in the old shop. Problem with that theory is that all I could find online says that all 3 phase power in Australia is 400-415 volts.
Reply:

Originally Posted by Norcal01

Correct, 415V is the normal voltage but 400V is the harmonized voltage.
Reply:You aren't alone in your lack of knowledge.An optimist is usually wrong, and when the unexpected happens is unprepared. A pessimist is usually right, when wrong, is delighted, and well prepared.
Reply:400V Voltage between phases on 230/400V three phase system (modern European system)415V Voltage between phases on 240/415V three phase system (old UK system)"USMCPOP" First-born son: KIA  Iraq 1/26/05Syncrowave 250 w/ Coolmate 3Dialarc 250, Idealarc 250SP-175 +Firepower TIG 160S (gave the TA 161 STL to the son)Lincwelder AC180C (1952)Victor & Smith O/A torchesMiller spot welder
Reply:Then harmonized means changed to conform to Europe?An optimist is usually wrong, and when the unexpected happens is unprepared. A pessimist is usually right, when wrong, is delighted, and well prepared.
Reply:yes-Since the EU was created they have been trying to get everyone on the same page in ALL markets.Electricity:UK was 240vEurope 220vsettled on 230v + -  10%and this is why Miller products have 230v listed in their manuals as well.

Ed Conleyhttp://www.screamingbroccoli.com/MM252MM211 (Sold)Passport Plus & Spool gunLincoln SP135 Plus- (Gone to a good home)Klutch 120v Plasma cutterSO 2020 benderBeer in the fridge
Reply:On the Euro 230V standard - Instead of mandating 230V which would have required changes in equipment, they simply broadened the +/- tolerance.  So they "unified" the standard without really doing anything.  Probably went on 3 week vacations after that hard work.When I was in Thailand back around 1977, they had a wide voltage tolerance.  It was like plus nothing and minus 40%.  My little house had a multi-tap transformer with a voltage alarm.  Crank it up gradually at dusk and then crank it back down as it alarmed later in the evening."USMCPOP" First-born son: KIA  Iraq 1/26/05Syncrowave 250 w/ Coolmate 3Dialarc 250, Idealarc 250SP-175 +Firepower TIG 160S (gave the TA 161 STL to the son)Lincwelder AC180C (1952)Victor & Smith O/A torchesMiller spot welder
Reply:Sorry to revive an old thread, but I'm trying to wire my Dynasty 280 dx to single phase (outside the US in a 240v grid) and don't know which wires to use. Dynasty got 4 conductors, green/yellow, black, white and red. Wall recreceptacle has 3 conductors, ground, line (230~240v) and neutral. Miller support are not familiar with power outside the US. And the manual shows wiring illustration for US single phase hookup where you need two legs (L1 and L2, black and white) to get 230v. Any help is appreciated.
Reply:

Originally Posted by precivilization

Sorry to revive an old thread, but I'm trying to wire my Dynasty 280 dx to single phase (outside the US in a 240v grid) and don't know which wires to use. Dynasty got 4 conductors, green/yellow, black, white and red. Wall recreceptacle has 3 conductors, ground, line (230~240v) and neutral. Miller support are not familiar with power outside the US. And the manual shows wiring illustration for US single phase hookup where you need two legs (L1 and L2, black and white) to get 230v. Any help is appreciated.
Reply:Most power in America and Canada for  three phase is 208, 240 & 480.208 is found where a  rentals using a lot of 120 volt start is 208. 240 is found on small pumps on farm and small manufacturing shops and only 2 legs are 120 and third one is 180 volts 480 is found in large shops center of start is 277We also have 575 volts too only found on very large manufacturers and large wind fans and pumps.Bottom line use volt meter so you have no surprises Dave

Originally Posted by ShaSteve

Hi there, any help is appreciated. We just moved shop and the mig is not like it was at the old shop. Its like inductance has gone down. Im questioning if the shops 3 phase wiring could cause this. I know it is out of phase with the old shop as the drop saw went backwards when turned on. The sparky swaped the phases on the saw to fix it. I question if this is the mig problems or just me going loopy.
Reply:[posted by precivilization] Sorry to revive an old thread, but I'm trying to wire my Dynasty 280 dx to single phase (outside the US in a 240v grid) and don't know which wires to use.