0558002757 - ESAB HP-550 TIG High Frequency Box

Industrial High-Frequency Arc Control

The ESAB HP-550 HF Generator is a specialized auxiliary device engineered to expand the operational capabilities of standard Constant Current (CC) welding power sources. Designed for industrial environments where precision and reliability are paramount, this unit superimposes a high-frequency voltage onto the welding circuit. This functionality is critical for Gas Tungsten Arc Welding (GTAW) applications, specifically for non-contact arc initiation and the stabilization of the arc during Alternating Current (AC) welding processes.

In technical applications involving aluminum and magnesium alloys, the AC welding arc naturally extinguishes as the current passes through the zero point of the sine wave. The HP-550 mitigates this by providing a continuous high-frequency overlay that maintains ionization in the arc gap, ensuring a stable and consistent arc. For Direct Current (DC) applications involving stainless steel or mild steel, the unit facilitates "touchless" starting, eliminating the risk of tungsten inclusion and base metal contamination associated with scratch-start methods.

The unit is rated for substantial power throughput, capable of handling welding currents up to 550 amperes, making it suitable for heavy-duty fabrication and manufacturing sectors. It integrates essential TIG control features, including a gas solenoid valve for automatic shielding gas management. This ensures that gas flow is synchronized with the arc, reducing waste and ensuring proper coverage. Additionally, the inclusion of a post-flow timer allows for controlled cooling of the tungsten electrode and the weld puddle, preventing oxidation and extending consumable life.

Installation of the HP-550 into an existing welding cell transforms a basic stick welder or DC power source into a competent TIG welding station. It features interface connections for remote current controls, such as foot pedals or hand pendants, allowing operators to modulate amperage dynamically. The robust chassis is built to withstand the rigors of shop environments, ensuring longevity and consistent performance under continuous load.