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TELWIN MASTERMIG 305i: Dual Voltage Power and Welding Precision for Professionals 230V/400V
The TELWIN MASTERMIG 305i is a microprocessor controlled MIG-MAG/FLUX/BRAZING wire welder built for the demands of professional welders and advanced users. The machine is versatile and reliable, made for intensive work in workshops, on production lines and during assembly jobs on site. The MASTERMIG 305i delivers a stable arc and clean weld quality whatever the conditions, with no compromise.
A key feature of the MASTERMIG 305i is that it runs on 230V as well as on 400V, which gives real flexibility and mobility. Whether you work in a well equipped workshop with a three phase supply or in a place where only a standard single phase socket is available, the welder adapts to the conditions and keeps full power and output. That removes the need for two separate machines and lets you take jobs in very different locations.
At the heart of the machine is inverter technology, which cuts weight and size and, above all, gives precise control over the welding process. The MASTERMIG 305i therefore offers a very stable arc, low spatter and the ability to weld steel, stainless steel, aluminium and galvanised sheet. Synergic programs together with manual correction of the parameters let you match the welding characteristic to the job, which shows in the quality, the repeatability and the look of the weld.
The MASTERMIG 305i is not only raw power, it also brings functions that make the work easier and more efficient. A clear display and a simple control panel allow quick changes of the settings and monitoring of the main parameters in real time. Functions such as current ramp up, wire burn back time and the electronic reactance give full control over the weld pool from arc striking to the end of the arc.
With the TELWIN MASTERMIG 305i you get a powerful tool that helps you raise the standard of your work, tighten your processes and take on demanding welding projects. It carries Italian engineering and decades of Telwin experience in building welding machines for the world market.
Advanced Features of the TELWIN MASTERMIG 305i 230V/400V
Dual Flexibility: 230V/400V Supply Without Compromise
One of the most distinctive features of the TELWIN MASTERMIG 305i is that it works with two supply voltages: single phase 230V and three phase 400V. The machine recognises the connected voltage and adapts its internal circuits to deliver the output and the welding current range that the given source allows.
For a professional this means unusual versatility. A standard 230V socket lets you work where the power infrastructure is limited, in small workshops, garages or on assembly jobs on site. With a 400V supply the welder releases its full potential, with higher welding current and a better duty cycle for intensive industrial tasks and thicker material. This dual voltage capability removes the need for two separate machines, which lowers the investment and simplifies logistics.
Intelligent Welding with Synergic Control and ATC Technology
The TELWIN MASTERMIG 305i raises the level of intelligent welding through microprocessor control and preset synergic programs. You select the material (for example carbon steel, stainless steel, aluminium), the wire diameter and the shielding gas, and the machine sets the welding parameters for you, among them arc voltage and wire feed speed. That helps a lot when tasks and materials change often, it cuts the risk of a wrong setting and keeps the weld quality repeatable.
In addition, the MASTERMIG 305i often includes the ATC technology (Advanced Thermal Control) from Telwin. This is a special operating mode optimised for welding thin material. ATC controls the energy delivered to the weld pool, which prevents overheating and distortion of thin sheet, something that matters in the automotive trade and in light structures. The result is a neat and strong weld without the risk of burn through.
Full Arc Control for Clean Welds
Professional welders will appreciate the wide adjustment of the arc parameters in the MASTERMIG 305i, which goes beyond the standard settings. The machine allows manual correction of the arc length, so the characteristic can be matched to your own preference and to the job. Functions such as the adjustment of the wire ramp up speed, the so called soft start, give smooth arc striking without spatter, which matters above all on aluminium and stainless steel.
Another key element is the wire burn back time adjustment, which stops the wire sticking to the contact tip at the end of the weld, extends the life of the consumables and keeps the machine ready for the next cycle. The advanced electronic reactance (inductance) shapes the arc characteristic, from soft for thin sheet to hard and concentrated for deep penetration. These functions give the welder the means to reach a high weld quality in ordinary workshop conditions.
Rugged Build and a High Level of Operator Safety
The TELWIN name has stood for Italian quality and reliability for years, and the MASTERMIG 305i follows that line. The machine is built for intensive use in demanding industrial settings. A solid metal housing protects the internal components against mechanical damage, and an efficient cooling system with a controlled fan keeps the working conditions right even during long welding cycles under high load.
Operator safety comes first, so the MASTERMIG 305i has a set of protections: thermal (against overheating), against overload, against overvoltage and against undervoltage. Many machines in this class also carry a VRD function (Voltage Reduction Device), which lowers the voltage at the electrode at idle to a safe level. That counts in damp surroundings or wherever the risk of electric shock is higher. With the MASTERMIG 305i you get steady, long and safe operation.
Technical Specification
| Parameter | Value |
|---|---|
| Catalogue number | 816200 |
| EAN code | 8056590373330 |
| Supply | Single phase 230V (50/60Hz) / Three phase 400V (50/60Hz) |
| Maximum input power (230V) | 7.5 kW |
| Maximum input power (400V) | 10.5 kW |
| Input power at 60% (230V) | 4.0 kW |
| Input power at 60% (400V) | 5.5 kW |
| Mains fuse (230V) | 25 A |
| Mains fuse (400V) | 16 A |
| Power factor cos φ | 0.9 (at maximum current) |
| Open circuit voltage | 60 V |
| Welding current range (230V) | 20 - 240 A |
| Welding current range (400V) | 20 - 300 A |
| Maximum current (230V) | 240 A @ 20% |
| Maximum current (400V) | 300 A @ 25% |
| Current at 60% duty cycle (230V) | 140 A |
| Current at 60% duty cycle (400V) | 170 A |
| Steel wire diameter | 0.6 - 1.2 mm |
| Stainless steel wire diameter | 0.8 - 1.2 mm |
| Aluminium wire diameter | 0.8 - 1.2 mm |
| FLUX cored wire diameter | 0.8 - 1.2 mm |
| Brazing wire diameter | 0.8 - 1.0 mm |
| Maximum wire spool weight | 15 kg (Ø 300mm) |
| Protection class | IP23 |
| Dimensions (L x W x H) | 870 x 450 x 800 mm |
| Weight | approx. 41 kg |
| Standards | EN60974-1, EN60974-10 |
Key Features and Benefits
- Dual Voltage Supply (230V/400V): Automatic detection of and adaptation to the mains voltage (single phase 230V or three phase 400V) gives maximum flexibility. For a professional this means work in any location, from a modern industrial plant to a workshop with limited access to a three phase installation, without losing power and without unstable welding parameters, which suits mobile and stationary work alike.
- Advanced Inverter Technology: The heart of the MASTERMIG 305i is a modern inverter module that gives precise control of the arc characteristic, high arc stability and much lower energy use than a traditional transformer welder. For the welder that means smooth and even welds with good penetration, low spatter that shortens the finishing work, and lower electricity bills.
- Intelligent Synergic Control (TELWIN ATC TECHNOLOGY): The machine has advanced microprocessor controlled synergic programs for different materials (steel, stainless steel, aluminium) and shielding gases. Once the material, the wire diameter and the gas are selected, the welder sets the welding parameters itself. The professional gains much faster setup, repeatable results and easy operation even on demanding alloys. The ATC system (Advanced Thermal Control) additionally optimises welding of thin sheet and reduces the risk of burn through.
- Precise Adjustment and a Full Set of Welding Functions: The MASTERMIG 305i offers a broad welding current range and advanced functions such as wire ramp up speed (soft start), wire burn back time, electronic reactance (inductance) and the choice of 2T/4T/SPOT mode. For the expert that means control over every stage of the welding process and the option to match the parameters to the job, which shows in better weld quality, lower stress in the material and better penetration.
- TELWIN Standard of Reliability and Safety: A solid build, an efficient fan cooling system and a set of protections (thermal, overload, overvoltage, undervoltage) keep the machine running long and without failure even in hard industrial conditions. The VRD function (Voltage Reduction Device) lowers the open circuit voltage and raises operator safety, above all in a damp environment. The MASTERMIG 305i is an investment in a durable and safe working tool.
- Clear Interface and Easy Operation: A readable control panel with a digital display (or an advanced graphic panel depending on the version) allows quick and precise selection and monitoring of the welding parameters. Ergonomic knobs and buttons make it easy to move through the menu and change settings even in welding gloves. For the welder that means comfort, less risk of a mistake and faster results.
Applications
- Manufacture and repair of steel structures in light and medium industry.
- Advanced metalwork, workshop and craft jobs.
- Welding and repair in the automotive trade (bodywork, frames, exhaust systems, steel, aluminium).
- Welding of stainless steel in catering, the chemical industry and pharmaceuticals.
- Braze welding of galvanised and high strength sheet (HSLA/TRIP).
- Maintenance and upkeep work in production plants.
- Assembly of structures and installations on site thanks to the 230V supply.
- Building and repair of small craft (aluminium, steel).
Scope of Delivery
- TELWIN MASTERMIG 305i 230V/400V welder (cat. no. 816200)
- MIG/MAG welding torch (for example type MT25 or MT36, length 3m or 4m, depending on the configuration)
- Earth cable with clamp
- Feed rollers for steel wire (for example for diameters 0.8-1.0 mm or 1.0-1.2 mm)
- Hose for connecting the shielding gas (optional, may be a quick coupling)
- Operating manual and warranty card
Summary: TELWIN MASTERMIG 305i 230V/400V, Your Best Investment
The TELWIN MASTERMIG 305i is more than a welder, it is a reliable partner on the way to precise welding work. The combination of dual voltage supply, synergic control and advanced arc functions gives you a tool that adapts to the task and holds quality and output. Take your work a step further and trust the technology that professionals use around the world. Choose the TELWIN MASTERMIG 305i and weld without limits.
Catalogue number: 816200
EAN code: 8056590373330
