Rated input voltage(V):AC380V+/-15%
Rated frequency(Hz):50/60
Rated input current(A):21 38 38 53
Duty cycle(%):60

1.Application
It uses IGBT invert technology, stable output current, strong pressure-resist waving(V±15%), high duty cycle, welding continualy for long time.
It has electric reactor controller, stable welding course, small flash, deep liquid bath and wonderful shape.
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 1.0mm and over steel plate.
NB-S series have decrease characteristic, available on stick(MMA) welding, carbon arc welding and CO2 gas shielded welding.
Normal Accessories: Earth clamp 1pcs, CO2 regulator 1pcs, electrode feeder 1pcs, Earth cable 2m, Control cable 5m, MIG torch 1pcs.

2.Specification

Parameter NB-350 NB-500 NB-500S NB-630

Rated input voltage(V)	AC380V±15%
Rated frequency(Hz)	50/60	50/60	50/60	50/60
Rated input capacity(KVA)	14	25	25	35
Rated input current (A)	21	38	38	53
Rated working voltage(V)	34	40	40	45
Duty cycle(%)	60	60	60	60
Efficiency(%)	85	85	85	85
Power factor	0.93	0.93	0.93	0.93
Weight(kg)	43	50	50	62
Overall dimension(mm)	665x325x585	665x325x585	665x325x585	700x350x645
Output current range(A)	60-350	60-500	60-500	60-630
Output voltage range(V)	15-40	15-50	15-50	15-50
Diameter of input power cable(mm2)	≥3 x 4	≥3 x 6	≥3 x 6	≥3 x 6
Welding cable(mm2)	≥35	≥50	≥50	≥70

3.Guide of welding different metals Material of work piece Welding type Dia.Welding wire Adjustment current(A) Suitable model

Carbon steel, Stainless Steel, Alloy Steel	CO2/MAG	1.0/1.2	50-350	NB350
	CO2/MAG	1.0/1.2/1.6	80-500	NB500/NB500S
	CO2/MAG	1.0/1.2/1.6	100-630	NB630
	MG(Solid cored wire)	1.2	260-420	NB500/NB500S
	CO2(Flux cored wire)	1.2	120-300	NB350
	CO2(Flux cored wire)	1.2/1.6	120-450	NB630