It adopts integrate circuit, technology of power mould high capacity of Thyristor and fine adjustable easy capacity
It can adjust current and voltage separately. Changed one knob that can welder to choose CO2/MAG, and cooperate with other kinds of air automatic welding machine.
It is suit for welding many kinds of metal, such as low carbon steel, low alloy steel, high strength steel, stainless steel and aluminum.
It is suit for car building, metal structure, chemical machinery, boiler pressure vessel, pipe fields etc.

Parameter
NB series
NB-250 NB-350 NB-500 NB-630
Rated input voltage(V) 3 phase AC 380± 15%
No-load voltage (V) 45 54 65 74
Rated frequency(Hz) 50/60
Rated input capacity(KVA) 13 22 38 55
Rated input current(A) 19 33 57 83
Output current range(A) 50-250 50-350 60-500 80-630
Rated Output voltage (V) 26.5 31.5 39 44
Efficiency % 85
Duty cycle(%)(25centigrade) 60
Power factor COSφ 0.8
Dia. Of welding wire (mm) φ 0.8-1.0 φ 0.8-1.2 φ 0.8-1.6 φ 1.0-2.4
Dia. Of input power cable mm2 4 4 6 12
Welding cable mm2 25 35 50 70
Air pressure L/s 6-8 6-12 6-20 8-25
Insulation Class F
Protection Class IP21S
Weight(kg) 89 138 175 220
Overall dimension(mm) 700× 390× 700 700× 390× 750 700× 435× 775 720× 520× 910