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Application: .1: changing the primary coil circle number, the change over switch is adjusted voltage, and possesses the good welding capability.2: Spot welding merit ability, convenient spot welding requirement of user's are possessed.3: Send a machine with the power supply integration, and moves more promptly.4: Carbon steel, alloy steel, stainless steel and aluminum cab be welded, especially the precision being suitable high strength welding, like pressure container, automobile manufacturing, ship yard and steel construction.5: Suit many kinds of extensions of complicated welding course such as robot welding and automatic welding etc...Technical data:.Model: NBC 270Input voltage and frequency: 3~380V±10%, 50~60HzRated input power(KVA): 16Rated input current(A): 25.1Rated output voltage(V): 27.5Duty cycle: 45%Output current range(A): 50-270Output voltage range(V): 16.5-27.5Insulation class: FProtection grade: IP21SCreater current(A): 50-270Creater voltage(V): 16.5-27.5Dimension