Solutions to Address Arc Welding Problems in an Operating Potline

摘要

Arc welding in an operating potline has always been problematic, especially repairs to aluminium busbar systems. The modern trend for higher potline amperages both in new and existing plants has led to an increase in these problems. To address this issue an electromagnetic shield has been developed. The shield is described along with modelling and magnetic measurements demonstrating its effectiveness. Further, the shield has been tested by welding cover plates on positive riser bolted joints at full line current. The results are encouraging and demonstrate that voltage drop gains can be made by on line repairs.