0460514880D - ESAB LAF 1251 DC Submerged Arc Welding Power Source (Demo Unit)

High-Performance Automated Welding Power

The ESAB LAF 1251 is a three-phase, fan-cooled DC welding power source specifically engineered for high-productivity automated Submerged Arc Welding (SAW) and Gas Metal Arc Welding (GMAW). Designed to integrate seamlessly with ESAB's A2 and A6 automatic welding tractors and the PEK process controller, this unit serves as the backbone for heavy industrial fabrication lines. Its robust electrical architecture ensures consistent arc characteristics, which are critical for achieving defect-free welds in thick materials used in shipbuilding, wind tower construction, and pipe manufacturing.

One of the defining technical features of the LAF 1251 is its excellent voltage compensation capability. In industrial environments where mains voltage can fluctuate, the LAF 1251 automatically adjusts to maintain precise output parameters, ensuring that the heat input and penetration profile remain constant throughout the weld. This level of control is essential for meeting strict code requirements in pressure vessel and structural steel applications. The machine also offers excellent starting properties and stable arc performance across the entire current range, from the root pass to high-deposition fill passes.

This specific unit is a DEMO model, offering the same industrial-grade performance and reliability as a factory-new unit but at a more accessible price point. It is configured for 440/550V 3-phase input, making it suitable for standard heavy industrial power grids. The unit is designed for high duty cycles, allowing for long-duration welds without thermal shutdown, maximizing uptime in continuous production environments.