Imagine the situation: a project requires immediate intervention at a facility where only a standard 230V outlet is available, and in a moment you are moving to a production hall with a 400V installation. With TELWIN LINEAR 500i XD, you don’t have to choose or compromise. This unit is designed for maximum operational versatility.

Thanks to an intelligent voltage recognition system, the welder automatically adjusts its operating parameters to the available source – single-phase 230V or two-phase 400V (in a three-phase system). With 230V power, the LINEAR 500i XD offers an impressive welding current of up to 350A, which still allows it to handle most welding tasks. The device develops its full power, as much as 500A, when powered by 400V, allowing it to work with the thickest materials and electrodes up to 8mm in diameter.

This feature eliminates the need to have several welders dedicated to different types of power supply, saving space and investment costs. For the professional, it also means greater mobility and independence, ensuring that the job gets done efficiently, regardless of the power infrastructure at the job site. This is true freedom of action for welders working in diverse environments.

MMA (shielded electrode) welding is an art that requires not only skill, but also the right equipment. The TELWIN LINEAR 500i XD takes this technique to a new level with advanced microprocessor-controlled features that work in conjunction with a powerful transformer source to provide unparalleled quality and comfort.

The Hot Start function delivers a current pulse higher than the set current at the time of arc ignition. This is a critical convenience, especially when working with alkaline electrodes, wet electrodes or on cold material, guaranteeing an instant and reliable start to welding without sticking electrodes. Arc Force (arc dynamics), on the other hand, is an intelligent system that monitors arc voltage in real time and adjusts welding current. When the arc shortens (risk of short-circuiting), the current is increased, preventing dimming and making it easier to guide the electrode in difficult positions. The result? A stable, smooth arc, deeper fusion and less spatter.

The Anti-Stick function is a real game-changer: if the electrode adheres to the material, the system immediately reduces the welding current to a minimum. This allows the electrode to be easily detached without damaging it and without leaving deep marks on the part being welded. These three functions, working synergistically, translate into higher productivity, lower consumables consumption and welds of excellent quality, even in the hands of less experienced operators.

The XD (Xtreme Duty) series from Telwin isn’t just a marketing slogan – it’s a promise of reliability and durability in the toughest operating conditions. The LINEAR 500i XD model is built like a tank to withstand the rigors of daily work in heavy industry, shipyards, construction sites and high-duty workshops.

At the heart of the device is a powerful transformer, known for its longevity and overload resistance, supported by advanced control electronics. The whole is enclosed in a robust metal housing that protects the internal components from mechanical damage. The IP23 rating means resistance to solid objects over 12.5 mm in diameter and to water sprays up to 60° from the vertical, which is crucial in dusty or moisture-prone environments.

Also key is an efficient cooling system, often with tunnel airflow, which protects sensitive electronic components from dust and debris while efficiently dissipating heat. Additional thermostatic, over-voltage, under-voltage and over-voltage protections constantly monitor operating parameters, protecting the welder from failures. For the professional, this means minimized downtime, reduced service costs and the assurance that the equipment will last for many years, even under heavy use.