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mig, melting polar gas shielded wenlding machine, high quality and stable performance - details see: https://www.machineto.com/nb-350-i-mig-mag-welding-machine-igbt-series-10137754

model	NB350I	NB500I	NB630I
input voltage(V)	AC380V±15%	AC380V±15%	AC380V±15%
frequency(Hz)	50/60	50/60	50/60
rated input current(A)	21.1	37.5	55
output current regulation(A)	50-350	80-500	100-630
output voltage regulation(A)	16.5-31.5	16.5-50	16.5-50
duty cycle(%)	60	60	60
power factor	0.93	0.93	0.93
efficiency(%)	85	85	85
wire diameter	0.8/1.0/1.2	1.0/1.2/1.6	1.0/1.2/1.6
speed of feeding(m/min)	3-15	3-15	3-15
protection rating	IP21	IP21	IP21
insulation rating	F	F	F
outputcable(mm²)	more than 35	more than 50	more than 70
host weihght	28	42	45
machine dimension	515*263*440	685*302*660	685*302*660

material	welding method	welding diameter(Φ)	welding current range(A)	suitable machine
mild steel, stainless steel, ordinary low alloy steel	CO2/MAG	0.8/1.0	50-200	NBC200S
	CO2/MAG	0.8/1.0	50-250	NBC250S/NBC250Y
	CO2/MAG	0.8/1.0	50-300	NBC300Y

advantages,

1. It’s adopted IGBT high frequency inverter technology, with 20KHz inverter frequency;
2. high quality and stable performance due to the PWM control;
3. direct oprating and convenient use with digital welding current/voltage preset and display;
4. Current can adjust by itself within the length of 30mm, which is suitable for all-position welding;
5. Performance of welding process is stable and the ability to resist power grid volatillty is strong(310V-450V);
6. highly stable wire feeding within the range of total current with constant speed wire feeding circuit;
7. The special electronic reactor can precisely control the process of short circuiting transfer and hybrid transfer.