Telwin Infinity 225 DC - Inverter Welder (TIG HF/LIFT, MMA) + Kit, VRD, direct current (DC), with LCD display

The Telwin Infinity TIG 225 DC-HF/LIFT VRD inverter welder is the new TIG inverter welder with high frequency HF or LIFT ignition, allowing for pulsed welding (PULSE). Additionally, this model can be transformed into an MMA electrode welder for all types of requirements.

This welder is part of the Elements line, a new range of products created by Telwin for DIY experts, the most demanding hobbyists, and professionals looking for simple to use, safe, and quality products. A series of items with the guarantee of the Italian brand Telwin, which for over 50 years has been one of the world leaders in welding, plasma cutting, charging, and starting.

The great performance is highlighted by a maximum power of 200A and a significant duty cycle. It can be used with various materials such as steel, stainless steel, titanium, copper, nickel, and their alloys.

Other important features of this welder include:

• EASY PULSE function is ideal for quick setup or for beginners. In fact, it automatically sets the various current adjustments and pulse times.
• Finder function: a useful support to complete work quickly and accurately. It facilitates arc ignition at very low currents and aids in the subsequent positioning of the torch for greater welding precision.
• VRD device: Voltage Reduction Device, reduces the output voltage when the welder is on but not in use, making the product even safer for the operator.
• MMA adjustments. Hot Start and Arc Force: better arc ignition and weld bead. Anti-Stick: system that eliminates the problem of electrode sticking.
• Easy-to-read LCD panel that allows clear visualization of the TIG welding curve.

The Telwin Infinity TIG 225 guarantees high welding current stability in case of power supply voltage variations.
Equipped with multiple safety systems: thermal protection, overvoltage, under-voltage, overcurrent, generator (+/-15%): All Telwin inverters ensure correct operation for power supply voltage variations up to 15%, it is advisable that generators are adequately stabilized.

MMA electrodes diameter 1.6–4 mm.
Usable electrodes: rutile, basic, stainless steel, cast iron, etc.

Detail of the technical sheet

• TIG and MMA welding
• Power supply: 230 Volt
• Max absorbed power: 4.7 KW
• Power absorbed in 60%: 3.2 KW
• Fuse: 16 A
• TIG: steel, stainless steel, titanium, copper, nickel, and related alloys
• MMA electrodes to be used: 1.6 - 4 Ø mm
• Usable MMA electrodes: rutile, basic, stainless steel, cast iron
• Open circuit voltage: 82 Volt
• Power: 10 - 200 A
• Duty cycle at 40°: 20% at 200 A

According to CEI EN 60974-1 standard, technical tests on the welder are carried out at an ambient temperature of 40°C and when the source is at thermal regime, i.e., after working for a certain time. At lower temperatures or when the machine is cold, the useful welding cycle naturally increases.

The machine can be set in two ways:

1. Direct polarity connection direct current: With direct polarity, the torch, with its cable, is connected to the negative pole and the material to be welded to the positive pole of the supply source; in this case, electrons flow from the electrode to the piece causing its fusion. It is the most used type of current with the TIG system and ensures good weldability on almost all commonly weldable metals and alloys, except for aluminium. Direct current with direct polarity produces a narrow and deep fusion bath as well as significantly superior penetration to that obtainable with reverse polarity.
2. Reverse polarity connection direct current: Welding with this polarity, the torch, with its cable, is connected to the positive pole and the piece to the negative pole of the supply machine. This type of power supply is rarely used because it produces a flat bath with poor penetration. Reverse polarity causes excessive heating of the electrode; to avoid burning it, rather low current intensities must be used. This justifies its limited use.

The LCD panel is easy to read even in poorly lit environments and allows clear visualization of the TIG welding curve, facilitating the adjustment of multiple parameters including:

• Start current
• Frequency
• Pulsation balance
• Spot welding time adjustment starting from 10ms.

Detail of the power switch and the strap to facilitate transport