The Ralli Wolf RA40HD (ARC 400HD) is a rugged, heavy-duty IGBT-based inverter welding machine designed for continuous industrial use, including sites running on generator power. With Arc Force anti-sticking control, adjustable Hot Start, and a dust-free cooling system with an upgraded duty cycle, the RA40HD is built to deliver reliable, smooth arc performance across construction, fabrication, pipe welding, and foundry applications. Manufactured by Ralli Wolf Industries Ltd. under ISO 9001:2015 certification, it brings 60+ years of engineering trust to demanding job sites.

KEY FEATURES

• Arc Force function for anti-sticking performance
• Hot Start (0–130A) for smooth arc initiation
• VRD (Voltage Reduction Device) function for welder safety
• Optional remote control function
• Dust-free cooling system with upgraded duty cycle
• Compatible for use with a generator power supply
• IGBT (Tubular) inverter technology for efficient, stable output

TECHNICAL SPECIFICATION

APPLICATION

• Education and technical training workshops
• Construction site welding
• Maintenance and repair work
• Pipe welding
• Fabrication work
• Foundries
• Shipbuilding and installation projects

WHY CHOOSE THIS

The Ralli Wolf RA40HD is purpose-built for tougher, less predictable working conditions than a standard inverter welder. Its ability to run on generator power makes it a practical choice for remote sites, construction yards, and shipbuilding locations without stable grid electricity. The Hot Start and Arc Force functions reduce electrode sticking and give welders a smoother start every time, while the dust-free cooling system and upgraded duty cycle mean it can handle longer, heavier-duty welding sessions without overheating. Combined with VRD safety protection and IGBT tubular technology, the RA40HD offers durability and consistent performance across education, construction, fabrication, pipe, and foundry applications.