Frequency inverter spot welder convex MDZ series frequency inverter point convex welder Features ★ IF DC inverter spot welder is convex current international advanced resistance welding products. ★ low running costs, save power, high-energy, high-quality, high efficiency, with unparalleled welding stability. ★ balanced three-phase power input, power factor up to 95%, the secondary circuit is almost no energy loss induction. ★ lower welding current and electrode force, the electrode life is greatly improved, reducing the electrode grinding time and cost. ★ more accurate, faster, more comprehensive control and analysis of the welding parameters, welding time is short, greatly improving production efficiency. ★ widely used for all kinds of metal products, especially for aluminum welding products more good results. .