The TELWIN LINEAR 450i redefines the concept of mobility and adaptability in professional welding. A key innovation is the ability to work with two different power supply voltages: single-phase 230V and three-phase 400V. The unit automatically detects the type of power supply connected and optimizes its parameters to provide the best possible performance.

When connected to a 400V (3 phase) mains, the welder unleashes its full potential, offering a maximum welding current of up to 400A. This allows welding the thickest materials with electrodes as small as 8 mm in diameter, with an impressive duty cycle. It is ideal for stationary welding stations in manufacturing plants, construction workshops or shipyards.

In turn, the ability to operate on 230V (1-phase) power makes the LINEAR 450i an extremely versatile tool for field work, service work or in areas where access to 3-phase power is limited. Despite the lower voltage, the welder still delivers significant current (up to about 280A), sufficient for most MMA and TIG tasks. This dual flexibility eliminates the need for several units and guarantees readiness for any conditions.

MMA (shielded metal electrode) welding with the TELWIN LINEAR 450i is pure pleasure and a guarantee of excellent results, thanks to built-in advanced support functions. These technologies actively optimize the welding process, making it easier and more efficient.

Arc Force (Arc Dynamics): This is an intelligent function that dynamically adjusts the welding current according to the arc length. When the arc becomes shorter (such as when welding in forced positions or with difficult electrodes), the system automatically increases the current, preventing the electrode from “sticking” and extinguishing the arc. This ensures a deeper fusion and a more stable process, even when the distance between the electrode and the material fluctuates.

Hot Start (Hot Start): Every welder knows how important it is to ignite an electrode reliably. The Hot Start function provides a momentary pulse of higher current at the very beginning of welding. This makes it easier to ignite the arc, especially with cold electrodes, wet materials or hard-to-ignite electrodes (such as alkaline). The result is an immediate start without frustration or defects at the beginning of the weld.

Anti-Stick (Anti-Collapse): During MMA welding, it happens that the electrode sticks to the material being welded. The Anti-Stick function automatically reduces the welding current to a minimum when a short circuit is detected. This prevents overheating and damage to the electrode (known as “glowing red”) and makes it easier to detach the electrode from the material without damaging the electrode holder. This saves materials and time.

The TELWIN LINEAR 450i is not only about power and intelligent features, but above all about reliability and durability, which are key in professional industrial applications. The unit’s construction is designed for intensive use in demanding environments. The robust metal housing and IP23 protection guarantee resistance to dust, moisture and accidental mechanical damage.

Internal components are protected by a number of advanced safety features. These include thermostatic protection, which prevents the unit from overheating during prolonged high-current operation. Overvoltage and undervoltage protections protect the welder’s electronics from fluctuations in line voltage, which is especially important when working on unstable power lines or with generators. In addition, an overcurrent protection system responds to possible overloads.

The LINEAR 450i is also suitable for use with power generators, provided that the generator’s output voltage is sufficiently powerful and stable. This feature significantly increases the mobility and applicability of the welder in the field, where access to the electrical grid is impossible. With all these features, the professional can be sure that the TELWIN LINEAR 450i is an investment in a long-lasting, trouble-free and safe working tool.