GB ZX7 300 L Welding Machine | 300A Single Phase IGBT MMA ARC Inverter Welder
GB ZX7 300 L Welding Machine – Heavy-Duty Portable ARC Inverter Welder
The GB ZX7 300 L Welding Machine is a high-performance 300A MMA (Manual Metal Arc) inverter welding machine designed for professional fabrication, construction, maintenance, and industrial applications. Built with advanced IGBT inverter technology, it delivers excellent arc stability, easy arc ignition, low spatter, and high energy efficiency for smooth and reliable welding performance.
Operating on a 230V single-phase AC power supply, the GB ZX7 300 L provides an adjustable welding current from 20A to 300A, making it suitable for welding mild steel, carbon steel, stainless steel, and low-alloy steel. Its compact design, digital display, VRD safety function, and Arc Force control make it ideal for both workshop and on-site welding jobs.
Features:
- Brand: GB
- Model: ZX7 300 L
- Product Type: MMA ARC Inverter Welding Machine
- Technology: Advanced IGBT Inverter Technology
- Input Voltage: 230V AC, Single Phase
- Frequency: 50/60Hz
- Output Current Range: 20–300A
- Maximum Output Current: 300A
- Digital Current Display
- VRD (Voltage Reduction Device)
- Arc Force Control
- Hot Start Function
- Easy Arc Ignition
- Stable Arc with Low Spatter
- Compact & Lightweight Design
- High Power Saving Efficiency
- Forced Air Cooling
- Over-Voltage, Over-Current & Thermal Protection
- Suitable for Continuous Workshop & Site Welding
Specifications:
- Input Voltage: 230V AC, Single Phase
- Input Power Capacity: 8.9kVA
- Rated Input Current: 36A
- Output Current: 20–300A
- No Load Voltage: 56V
- Duty Cycle: 60%
- Efficiency: 85%
- Power Factor: 0.93
- Electrode Diameter: 2.5–4.0mm
- Protection Class: IP21
- Insulation Class: F
- Dimensions: 450 × 160 × 303mm














