ZX7 250 Inverter DC arc welding machine rates input:380V/15A No-load volt:54V Rated output/ ... ,the inverter frequency up to 20Hz,speedy dynamic response,easy to arc initiation,resistant to interference,stable arc,low welding noice,little welding spatter,deep ... .No load energy consumption less than 100w,Comparing with tradtional welding machine.energy saving up to 50%.5.Good thrust adjustment,resistant ...