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The SZW26-160 D303.3BF is an industrial-grade rotary changeover switch with a rated current of up to 160A. It features a three-position (1-0-2) and three-layer (three-section) structure, all integrated into a robust IP65-rated housing. Its core design allows for simultaneous and reliable switching of three independent high-current double-throw circuits via a single handle, suitable for complex control and safety isolation under extreme current conditions.
Key Features and Parameters:
* High Current Capacity: Rated operating current 160A, suitable for AC 440V/50-60Hz or DC 240V AC/DC main circuits.
* Three-Circuit Synchronous Switching: Employs a three-layer contact structure, enabling simultaneous control of three circuits. Position "1" connects contacts 1-2, 5-6, and 9-10; Position "2" connects contacts 3-4, 7-8, and 11-12; Position "0" completely disconnects all contacts, providing a clear safety isolation point.
Top-tier protection and connectivity: IP65 enclosure protection, dustproof and water-resistant. Equipped with M8 large-size wiring screws, it can connect large cross-section wires of 50-75 mm², with a tightening torque of 6.0 N·m, ensuring reliable connection and low contact resistance under ultra-high current.
High-reliability structure: Utilizing a flame-retardant and high-temperature resistant housing, the internal structure features specially thickened copper conductors and high-capacity silver alloy contacts, optimized for frequent switching under 160A current, possessing excellent conductivity, arc oxidation resistance, and mechanical strength.
Long lifespan: Mechanical life ≥ 100,000 cycles, electrical life ≥ 30,000 cycles (at a rated 160A load), meeting the requirements of heavy-duty industrial applications.
Wide environmental adaptability: Operating temperature range -25°C to +40°C, altitude ≤2000m, suitable for harsh industrial and outdoor environments.
Application Scenarios
This switch is specifically designed for critical applications requiring centralized, reliable manual switching and safe isolation of multiple ultra-high current (160A level) power supplies, loads, or control circuits in harsh environments.
Main Control Switching for Ultra-High Power Equipment and Systems:
Core Applications: Serving as a manual power selection or main/standby system switching switch for large electric furnaces, heavy rolling mills, central refrigeration units, high-power rectifier/frequency converters, and generator set parallel cabinets. It allows for overall switching between two complete power systems (including main circuits and control power supplies).
Core Nodes in Heavy Industry and Power Distribution: In power distribution centers of metallurgy, chemical industry, mining, shipbuilding, and data centers, it serves as a manual disconnecting switch and switching switch for 160A level core feeder circuits or important load circuits, used for maintenance isolation, load switching, and operating mode selection.
Outdoor heavy-duty mobile equipment: Integrated into the electrical control systems of port cranes, large engineering machinery, special operation vehicles, and ocean-going vessels, with IP65 protection, it enables the selection of power modes for different high-power working mechanisms, propulsion systems, or accessories, and can withstand extreme vibration, wind, rain, salt spray, and high dust environments.
