400V MIG WELDING SET

BWS is your one-stop for 400v MIG welding sets. Our range of products is sure to have the equipment that’s right for your job. 

Our 400v MIG welding sets include powerful, compact units at the right price. Additionally, all of our equipment is approved by our in-house team of engineers, with over 30 years of experience. This way, our customers can buy with confidence, knowing that experts have personally supported all of the BWS equipment available. 

So, browse the range today or contact the team for free technical assistance across any of the BWS products. 

Buying a 400V MIG WeldIng Set

400v three phase MIG Welders were always considered far superior in weld quality compared to 200v single phase units. This was because being three phase provided a more stable DC current. This is still true of transformer units but less so now with the onset of digital inverter welders. Here we explain more about this and more in our MIG Buying Guide. 

SINGLE PHASE OR THREE PHASE?

Obviously, in your home workshop or garage, you will have no choice but to choose the single-phase but to get the best from a transformer MIG MAG welder you really need three-phase. 

The rectifier cuts off the negative part of the AC wave to create DC inside the welder, a single-phase has gaps in the wave three-phase welder doesn't. This you will feel in smoother welding.

To compensate for the gaps in a single-phase welder we use capacitors (the red in the single-phase drawing).  The better the capacitors the smoother weld is.  Cheaper hobby type welders may not have capacitors in them making the arc quite course especially down low.