Inverter Submerged Arc Welding Machine – SAW1250i / L Tractor7-1250L03
The Inverter Submerged Arc Welding Machine – SAW1250i / L Tractor7-1250L03 is a powerful, compact, and lightweight solution designed for high-quality automated welding applications. Manufactured using the latest IGBT-based inverter technology, this system represents one of the most technologically advanced SAW power sources available today.
Engineered by AUSTWELD, the SAW1250i delivers exceptional performance for SAW (Submerged Arc Welding), SMAW (Stick Welding), and CAC-A (Air Carbon Arc Gouging), making it a versatile and reliable choice for heavy industrial welding environments.
What Makes the SAW1250i Unique?
The SAW1250i is built for precision, efficiency, and continuous-duty performance. Its inverter-based design ensures stable output, low energy consumption, and excellent weld quality—even in demanding automated welding operations.
Key advantages include:
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High-efficiency IGBT inverter technology
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Compact and lightweight design for easier installation
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Stable arc characteristics for consistent weld quality
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Ideal for automated and mechanized welding systems
Advanced Digital Control & Monitoring
The SAW1250i features digital LED displays that are easily readable even in dark working environments.
Key digital control features:
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Digital display of welding current and voltage during welding
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Display of average current and voltage after welding completion
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Accurate condition setting via dial control
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Fine adjustment capability: 1A current increments and 0.1V voltage increments
This precision control enables repeatable, high-quality welds across long production runs.
High Efficiency & Energy Savings
Low energy consumption combined with a high-efficiency wire feeder and torch enhances weldability while reducing operating costs. The system is designed to improve both economic efficiency and operator convenience, especially in automated welding lines.
L Tractor 7 Series Automatic Submerged Arc Welding System
The L Tractor7-1250L03 automatic submerged arc welding machine is composed of a tricycle tractor and the SAW1250i power source. It is suitable for welding:
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Lap seams
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Butt seams
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Fillet welds
on medium and thick plates of:
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Carbon steel
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Low alloy steel
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Stainless steel
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Heat-resistant steel
The tricycle tractor design incorporates proven features from both domestic and international SAW systems, offering a lightweight structure, reliable operation, and user-friendly performance.
Key Characteristics of L Tractor7-1250L03
Flexible Welding Operation
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Three-wheeled welding tractor that can operate with or without guideways
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With guideways: ideal for flat welding and flat filler welding of longitudinal welds
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Without guideways: front guide wheel can be steered manually for curved surface welding
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Adjustable front guide wheel angle for circular arc welds
Enhanced Weld Control
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Adjustable crater current, voltage, and flashback time for better arc ending control
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Selectable polarity to suit different welding processes
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Easily switchable arc striking modes directly from the panel
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Laser weld indicator ensures accurate tracking even in dim conditions
Flux & Wire Feeding System Design
The SAW1250i system is engineered for stable and efficient wire feeding:
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Optimized flux outlet design ensures proper flux coverage
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Detachable wire case structure for easier wire installation
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Tension-adjustable wire reel with damping to prevent wire disorder
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Semi-closed metal wire reel cover for durability and wire protection
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Double-driven wire feeding with straightening for consistent feed performance
Electrical Protection & Stability
To ensure long-term reliability, the system includes advanced protection features:
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High-frequency anti-interference design to protect PCB components
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Protection against short circuits in control cables
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Real-time detection of arc current and voltage to automatically adjust:
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Wire feed speed
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Thyristor conduction angle
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This guarantees stable current and voltage output, even when electrode stick-out changes during welding.
Robust Construction for Industrial Use
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Imported wire feed and drive motor with durable steel seat
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Steel main structure for enhanced durability
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Designed for continuous operation in tough industrial environments
Technical Specifications
SAW / SMAW / CAC-A Power Source
| Specification | SAW1250i |
|---|---|
| Input Voltage | 415V ±15% 3P |
| Rated Input Current | 100A |
| Rated Input Power | 65 KVA |
| Rated No Load Voltage | 80V |
| No Load Current | < 1A |
| No Load Loss | < 500W |
| Output Voltage Range | 22 – 50V |
| Output Current Range | 160 – 1250A |
| Rated Duty Cycle | 100% |
| Power Factor | ≥ 0.9 |
| Efficiency | ≥ 0.85 |
| Dimensions (L × W × H) | 730 × 360 × 970 mm |
| Net Weight | 108 kg |
L Tractor7-1250L03 Welding Tractor
| Specification | Details |
|---|---|
| Applicable Wire Diameter | 2.4 / 3.2 / 4.0 / 4.8 mm |
| Arc Striking Mode | Retracting / Scraping |
| Wire Feed Speed | 16 – 160 m/h |
| Welding Speed | 9 – 75 m/h |
| Adjustable Welding Head Range | 100 × 120 mm (H × V) |
| Adjustable Left/Right Range | 45° |
| Flux Capacity | 8 L |
| Wire Reel Capacity | 25 kg |
| Dimensions (L × W × H) | 1020 × 480 × 780 mm |
| Net Weight | 50 kg |
Ideal Applications
The Inverter Submerged Arc Welding Machine – SAW1250i / L Tractor7-1250L03 is ideal for:
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Automated submerged arc welding lines
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Heavy steel fabrication
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Pressure vessels and structural steel
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Shipbuilding and bridge construction
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Long seam and circular seam welding
