ZX7 250 Inverter DC arc welding machine rates input:380V/15A No-load volt:54V Rated ... ,easy to arc initiation,resistant to interference,stable arc,low welding noice,little welding spatter,deep melting pool,high welding strength,good welding quality.2 ... especially adopts proportional thrust control technology,single switch asjustment,simpler welding opweation.4.No load energy consumption less than 100w, ...