WS-250: 250A IGBT Inverter TIG Welder (GTAW) — Pulse AC/DC Precision Welding Machine
WS-250
250A Industrial TIG Welder with Pulse
Part of the TIG Welders product line. Designed and manufactured in Qingdao, China with IGBT inverter technology for reliable industrial performance. CE certified for global export.
Typical Applications: Food-Grade Equipment, Bicycle & Motorcycle Frames, Mold & Die Repair, Heat Exchanger Fabrication, General Fabrication
Product Overview
The WS-250 is a 250A AC/DC TIG welder (GTAW) powered by advanced IGBT inverter technology with digital pulse control. Positioned between the portable WS-200 and the heavy-industrial WS-315, it offers dual-voltage capability (220V single-phase / 380V three-phase), making it suitable for both workshop and light industrial environments. The WS-250 excels at precision welding of aluminum, stainless steel, and titanium with AC/DC dual pulse functionality that provides independent control over peak current, base current, pulse frequency, and pulse width.
With a 250A output at 60% duty cycle and a weight of just 12 kg, the WS-250 balances power and portability. The digital panel stores up to 10 welding parameter presets, while the HF arc start ensures tungsten preservation on every ignition. Advanced AC balance control (20-80%) lets operators fine-tune the cleaning-to-penetration ratio for aluminum welding. CE certified and built with industrial-grade IGBT modules, the WS-250 is the go-to TIG welder for fabrication shops that need single-machine versatility across multiple material types.
Detailed Specs — WS-250
| Parameter | Specification |
|---|---|
| Model | WS-250 |
| Welding Process | TIG (GTAW) / Stick (SMAW) |
| Rated Input Voltage | AC 220V ±15% 1-Phase / AC 380V ±15% 3-Phase, 50/60Hz |
| Rated Input Power | 7.2 kVA |
| Output Current Range (TIG) | 10 – 250A |
| Output Current Range (Stick) | 10 – 220A |
| Rated Duty Cycle (TIG) | 60% @ 250A / 100% @ 195A (40°C) |
| Rated Duty Cycle (Stick) | 60% @ 220A / 100% @ 170A (40°C) |
| No-Load Voltage | 70V |
| AC/DC Mode | AC / DC (TIG), DC (Stick) |
| Pulse Frequency | 0.5 – 500 Hz |
| Pulse Duty Ratio | 10 – 90% |
| Pre-Flow Time | 0 – 15s |
| Post-Flow Time | 0 – 30s |
| Up-Slope / Down-Slope | 0 – 15s each |
| Arc Start | High Frequency (HF) |
| AC Balance (Cleaning Width) | 20 – 80% |
| AC Frequency | 40 – 250 Hz |
| Tungsten Electrode Size | 1.0 – 4.0mm |
| Welding Thickness Range | 0.3 – 10mm (steel), 0.5 – 8mm (aluminum) |
| Efficiency | ≥85% |
| Protection Class | IP21S |
| Insulation Class | F |
| Cooling | Forced Air |
| Memory Presets | 10 channels |
| Dimensions (L×W×H) | 480 × 230 × 350 mm |
| Net Weight | 12 kg |
| Certifications | CE, RoHS (CSA available) |
| OEM Customization | Color, panel layout, input voltage, branding |
Application Scenarios
Food-Grade Equipment
Sanitary stainless steel welding for food processing machinery, brewery tanks, dairy equipment, and pharmaceutical vessels requiring smooth, crevice-free welds.
Bicycle & Motorcycle Frames
Precision TIG welding of chromoly steel, aluminum 6061/7005, and titanium bicycle and motorcycle frames with full heat control for thin-wall tubing.
Mold & Die Repair
Precision repair of injection molds, die-casting dies, and tooling with controlled heat input to prevent warping and maintain dimensional accuracy.
Heat Exchanger Fabrication
Tube-to-tube-sheet welding for shell-and-tube heat exchangers with consistent, leak-tight welds on stainless steel and titanium tubes.
General Fabrication
Versatile shop welding of stainless steel structures, handrails, brackets, frames, and custom fabrications in mild steel, stainless, and aluminum.
WS-250 vs Adjacent Models
| Model | WS-200 | WS-250 | WS-315 |
|---|---|---|---|
| Rated Current | 200A | 250A | 315A |
| Input Voltage | 220V 1-Phase | 220/380V 1/3-Phase | 220/380V 3-Phase |
| TIG Current Range | 10 – 200A | 10 – 250A | 10 – 315A |
| Duty Cycle @ Max | 60% | 60% | 60% |
| Pulse Frequency | 0.5 – 500 Hz | 0.5 – 500 Hz | 0.5 – 2000 Hz |
| AC Frequency | Fixed 50/60Hz | 40 – 250 Hz | 40 – 400 Hz |
| Max Aluminum Thickness | 5mm | 8mm | 12mm |
| Net Weight | 8 kg | 12 kg | 16 kg |
| Memory Presets | 5 | 10 | 20 |
| Best For | Light fabrication, hobby, thin sheet | Medium fabrication, mold repair, food equipment | Industrial aluminum fab, aerospace, ship piping |
Technical Highlights
Dual Voltage 220/380V
Operates on both single-phase 220V and three-phase 380V power. Workshop flexibility without dedicated industrial wiring when operating below 200A on single-phase supply.
AC/DC Dual Pulse Control
Independent pulse parameters for AC and DC modes. Precise control over weld pool fluidity and solidification rate, reducing distortion on thin materials and improving penetration on thicker sections.
10-Channel Memory Presets
Store and recall 10 complete welding parameter sets. Switch between stainless, aluminum, and steel jobs in seconds without re-tuning pre-flow, pulse, slope, or post-flow settings.
Industrial IGBT Reliability
Infineon-sourced IGBT power modules with integrated over-temperature, over-current, and under-voltage protection. Designed for continuous duty in production environments.
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