Superior than normal thyristor welder's ability and performance.Adopt wireless remote to improved manoeuvrability,reducing wire disconnection problem.New pattern design healthily improved the dustproof performance,which widely used in more fields.Can adjust current and voltage separately and has simple synergic,it can work with facility for both beginners and practician.NB-KR series is separated structure;which mainly consiss of welding power source,wire feeder and welding torch.The inner of welding power source is partly made up of AC contactor,air cooling fan,tri-phase transformer,and thyristor recifier model,paralleing reactor,control transformer,master-control electronic circuit and filter reactor.