OTC MR-400

is a high-performance DC arc welding machine designed for precision and efficiency in various industrial applications. Incorporating advanced IC-Thyristor technology, the MR-400 ensures stable arc performance and minimal spatter, resulting in high-quality welds across a range of metals.

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Key Features:

• • Advanced IC-Thyristor Technology: Provides stable arc and reduces spatter, enhancing weld quality.

  • Digital Control System: Allows precise adjustment of welding parameters for consistent results.​

  • High Output Current: Offers an output current range of 40–400A, accommodating various welding requirements.

  • Arc Drive Control: Standard feature that prevents electrode sticking and enables smooth welding operation.​

  • Constant Current Characteristics: Ensures stable welding current, maintaining consistent performance.​

  • Optional Remote Control Box: Facilitates easy setting of welding conditions for enhanced usability.​

Technical Specifications:

• • • Model: MR-400​

    • Power Source Voltage: 220V ±10%, 380V ±10%, 415V ±10%

    • Number of Phases: 3​

    • Rated Frequency: 50/60 Hz​

    • Rated Input Power: 26.3 kVA / 20.4 k

    • Rated Output Current: 400A​

    • Rated Load Voltage: 36V​

    • Output Current Range: 40–400A

    • Output Voltage Range: 21.6–36V

    • No-load Voltage: 65.0V​

    • Rated Duty Cycle: 60%​

    • Insulation Class: Main Transformer: Class C; DC Reactor: Class 200°C

    • Usable Temperature Range: -10°C to ±40°C

    • Protection Rating: IP21

    • Dimensions (W x D x H): 400 x 607 x 770 mm

    • Weight: 148–151 kg (depending on voltage model)​

    • Input and Grounding Cable: 14 mm² (220V), 8 mm² (380V/415V)

    • Fuse/Breaker Capacity: 75A (220V), 50A (380V/415V)​

Applications:

   The OTC MR-400 is ideal for:​

• • • Metal Fabrication: Suitable for welding steel, stainless steel, and other conductive metals in fabrication shops.​

    • Automotive Industry: Used for precise welding of vehicle components and chassis parts.​

    • Construction: Applicable in welding structural steel elements for buildings and infrastructure.​

    • Shipbuilding: Efficiently welds thick metal plates used in ship hulls and other marine structures.​

Advantages:

• • • Enhanced Productivity: High output current and duty cycle enable prolonged welding operations without overheating.​

    • Versatility: Supports a wide range of welding applications across multiple industries.​

    • Durability: Robust construction ensures reliable performance in demanding work environments.​

    • Safety: Incorporates multiple protection features to safeguard both the operator and the equipment.​

In summary, the OTC MR-400 DC Arc Welding Machine combines advanced technology, high performance, and user-friendly features, making it an excellent choice for professionals seeking reliable and versatile welding solutions.​