K3402-1 - Flextec 350X Construction 4-Pack Inverter Rack

Industrial Multi-Operator Welding Solution

The Lincoln Electric Flextec 350X Construction Compact 4-Pack Rack (K3402-1) is an engineered solution designed to streamline large-scale welding operations in construction, shipbuilding, and heavy fabrication environments. This system integrates four Flextec 350X Construction multi-process inverters into a single, ruggedized frame, providing a high-density power source with a minimal footprint. The rack is constructed from heavy-duty square tubing, ensuring structural integrity during transport and lifting. It features standard forklift pockets and lifting eyes, making it fully compatible with crane and forklift operations common on industrial jobsites.

Electrically, the rack simplifies site logistics by utilizing a single primary power drop. This distribution system feeds all four inverters, significantly reducing the amount of primary cabling required and minimizing the number of electrical connections needed at the distribution panel. The Flextec 350X units themselves are optimized for field use, boasting an IP23 rating that protects against water spray and foreign objects, ensuring reliable operation in outdoor conditions. The "Construction" model of the Flextec 350X is specifically equipped with CrossLinc Technology, a proprietary communication protocol that allows voltage and amperage control to be transmitted over the standard copper weld cable. This eliminates the need for fragile and expensive control cables, reducing jobsite clutter and maintenance costs.

The system delivers 350 Amps of welding output at a 60% duty cycle per arc, making it capable of handling heavy-duty Stick, DC TIG, MIG, Flux-Cored, and Arc Gouging applications. The inverters are Desert Duty rated, tested for operation in extreme temperatures up to 55°C, ensuring consistent performance in the most demanding climates. By consolidating four powerful arcs into one transportable unit, the K3402-1 offers a superior balance of power, portability, and protection for industrial contractors.