Seam Welding Machine, The main transformer is made of high-quality silicon steel sheet, and the mandatory water-cooling system can increase the out-put power as well as reducing the loss. Main technology parameter. Model NO. FN-75Rated primary voltage380V/220VRated capacity75KVARated primary current200ASecondary no load voltage6.3VAdjust methodadjustDuty cycle50%Max. welding thickness(mm)1.0+1.0Max. force electrodes4700NThroat depthNegotiationThe distance of the electrodesNegotiationWelding speed1.5 m/min