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1) Soft-switch inverter system, 2) Full digital control syste, 3) Water-cooling Unit inside, 4) Professional & heavy duty - details see: https://www.machineto.com/professional-aluminium-welding-machine-tig-gtaw-10134046

Professional AC/DC TIG Welding Machine: MASTERTIG-500CT

Features:

1) IGBT Inverter System, Soft Switch technology.

2) Full Digital controlling system, 64 byte MCU + DSP.

3) High-power SIEMENS IGBT module.

4) Perfect air-cooling system, Intelligent Ventilator Management.

5) Reliable Water-cooling Unit.

6) 3 Working Modes: AC TIG/DC TIG/MMA.

7) Embedded welding expert database, Flexible parameters adjustment.

8) Memory: Capable for storing 100 sets of user-defined parameters.

9) AC Bias(EP/EN) & AC Balance adjustable for precise welding.

10) 2T(STD)/4T(HOLD) control mode.

11) Heavy Duty for max loading, welding cable could be length to 100M.

12) Available to connect Foot Pedal (optional).

Item No.	MasterTIG-315	MasterTIG-400	MasterTIG-500
Input Voltage	3PH ~ 380/400V 50/60Hz
Input Power Capacity	12KVA	17KVA	23.5KVA
No-load Voltage	60-80V	60-80V	60-80V
Output Current Range	20-315A	20-400A	20-500A
Rated Duty Cycle	60%	60%	60%
Pulse Frequency Range	0.2-20Hz
Pulse Width Range	1-100%
Current Up-slope Time	0.1-10S
Current Down-slop Time	0.1-15S
AC Frequency Range	20-100Hz
AC Balance (SP Value)	-40 -- +40
AC Bias (EP/EN) Value	-50 -- +30
ARC Force Adjusting	1-10
Gas Pre-flow/Retard Time	0.1-15S
Dimension (LxWxH)	810x520x1084mm
Weight (KG)	65KG	75KG	90KG