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**Product Specifications: WSM7-400 IGBT Inverter Pulse TIG Welding Machine**
**Model No.:** WSM7-400
**HS Code:** 8515319000
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### **I. Key Features**
1. **Advanced Protection System**: The machine is equipped with automatic protection against overcurrent, overheating, overvoltage, and undervoltage, ensuring safe and reliable operation in various environments.
2. **Easy Arc Initiation**: It offers quick and stable arc initiation, with a concentrated heat source that improves welding efficiency and quality.
3. **Fully Adjustable Parameters**: Users can adjust the peak and bottom values of pulse, pulse frequency, pulse duty cycle, and maintaining current to suit different welding requirements.
4. **Versatile Welding Modes**: Supports DC TIG welding, pulse TIG welding, and MMA (Manual Metal Arc) welding, making it suitable for a wide range of applications.
5. **Comprehensive Functionality**: Incorporates all the advanced features of the WS7 series, offering a powerful and flexible solution for professional welders.
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### **II. Technical Specifications**
| **Parameter** | **Value** |
|---------------------------|------------------------------------|
| Power Source | 3-phase 380V / 415V / 220V, 50Hz |
| Rated Input Capacity | 17.3 KVA |
| Rated Input Current | 26.3 A |
| Rated Welding Current | 400 A |
| Welding Current Range | 400A (60% DE), 315A (100% DE) |
| Current Adjustment Range | 20–400 A |
| Efficiency | 83% |
| No-Load Voltage (TIG) | 40–50 V |
| No-Load Voltage (MMA) | 70–80 V |
| Current Up/Down Slope Time| 0–10 seconds |
| Pre-Gas Time | 1 second |
| Delay Gas Time | 5 seconds |
| Arc Start Method | HF (High Frequency) |
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This IGBT inverter-based TIG welding machine is ideal for industrial and professional use, combining performance, durability, and user-friendly controls. Whether you're working on thin materials or heavy-duty projects, the WSM7-400 provides consistent and high-quality welds with minimal effort. Its compact design and efficient power management make it a reliable choice for both beginners and experienced welders.