TEH TWA350-MMA160 Inverter Welding Machine

Specifications

• Type: Inverter arc welding machine for manual metal arc welding (MMA).
• Supply voltage: 160–270 V (single-phase, 50/60 Hz).
• Rated input current: 31.4 A.
• Welding current range: 20–160 A.
• Rated output voltage: 26.4 V.
• Open-circuit voltage: 35–50 V.
• Duty cycle (DC): 60% at 160 A.
• Electrode diameter: 1.6–4.0 mm.
• Efficiency: 80%.
• Power factor: 0.8.
• Insulation class: F (withstands up to 155°C).
• Protection class: IP21S (protection against solid objects and water splashes).
• Features:
  • Hot Start function for easy arc ignition.
  • Arc Force function for stable arc burning.
  • Anti-Sticking function to prevent electrode sticking.
  • Overheat and overload protection.
  • Operation under unstable supply voltage (160–270 V).
  • No-load losses: 40 W.
• Dimensions: ~220×345×220 mm (approximate, confirm with supplier).
• Weight: ~5.0–5.5 kg.
• Packing: Welding machine, electrode holder cable (2 m, 25 mm²), earth clamp cable (2 m, 25 mm²), carrying strap, user manual.

Advantages

• Compact and lightweight, easy to carry.
• Stable operation under unstable voltage (ideal for cottage or garage).
• Simplified welding thanks to Hot Start, Arc Force, and Anti-Sticking functions.
• High energy efficiency (80% efficiency) and low no-load losses (40 W).
• Robust metal housing, resistant to mechanical damage.

Applications

• Welding of carbon, low-alloy, alloy, heat-resistant steels, cast iron, and non-ferrous metals.
• Household and semi-professional tasks: repair of metal structures, fence fabrication, workshop work.
• Use on construction sites, cottages, and garages.
• Limitations:
  • Not designed for TIG welding of aluminum without additional equipment.
  • Do not use in high humidity or under rain (IP21S protection class).
  • Not suitable for prolonged use with electrodes over 4 mm in diameter or at high currents without breaks.

Usage instructions

1. Check the integrity of the machine, cables, and accessories before starting work.
2. Connect the earth clamp cable to the workpiece and the electrode holder cable to the electrode (1.6–4.0 mm diameter).
3. Connect the machine to the 220 V (160–270 V) power supply.
4. Set the welding current (20–160 A) using the regulator on the front panel.
5. Use protective gear (mask, gloves, clothing).
6. Start welding, holding the electrode at an angle of 70–80° to the surface.
7. If overheating occurs, the machine will disconnect automatically (indicator lights up); wait for cooling.
8. After use, disconnect the machine from the power supply, clean the cables, and store in a dry place.