ZHUCO SZW26-160/D202.2 1-0-2 Three-position two-section high-current changeover switch

The SZW26-160/D202.2 is a three-position (1-0-2), two-section (two-layer) rotary changeover switch with a rated current of up to 160A, designed for reliable manual switching and electrical isolation between two independent high-current circuits. It features a reinforced structure and high-capacity contact sets to meet the demands of applications under extreme current conditions.
Key Parameters and Features
Electrical Specifications: Rated operating voltage AC 440V (50/60Hz) / DC 240V, rated current 160A.
Contact Configuration: Uses two independent double-throw switching circuits, with a total of 8 terminals, enabling selection and isolation of two output paths.
Position 1: First output path connected (contacts 1-2 and 5-6 connected).
Position 0 (OFF): All contacts are completely disconnected, providing a clear and safe electrical isolation point.
Position 2: Second output path connected (contacts 3-4 and 7-8 connected).
Structure and Materials:
Contacts: Made of special silver alloy material, ensuring extremely low contact resistance, excellent arc resistance, and anti-welding capabilities at 160A current.
Conductors: Heavy-duty thickened copper components to meet the continuous current carrying and heat dissipation requirements of ultra-high currents.
Housing and Insulation: High-strength flame-retardant, high-temperature resistant, environmentally friendly materials provide reliable electrical insulation and mechanical protection.
Environmental Adaptability: Operating temperature range -25°C to +40°C, altitude ≤ 2000 meters. Suitable for normal industrial humidity conditions.
Lifespan: Mechanical life ≥ 300,000 cycles; Electrical life ≥ 60,000 cycles (at rated 160A load, operating frequency ≤ 120 times/hour).
Application Scenarios
This switch is specifically designed for critical industrial and power applications requiring manual selection, switching, or safe isolation of very high current (160A level) power sources or loads. Ultra-high power dual power supply switching:  Acts as a manual transfer switch for two ultra-high capacity power sources (such as mains power and a generator, or two independent high-voltage transformer outputs), providing power supply assurance for heavy-duty equipment.
"One-active, one-standby" control for extra-large loads: Controls the operating mode selection and switching of two heavy-duty devices with a rated current of up to 160A (such as large pump sets, compressors, and electric furnace transformers).
Safety isolation point for critical circuits: In the inspection and maintenance of heavy industrial production lines, electrolysis and electroplating systems, and power distribution systems, its intermediate "0" position provides a highly reliable electrical isolation point, making it a key component for implementing safety lockout (LOTO) procedures.
Typical industries: Widely used in metallurgy, chemical industry, mining, power generation, and large-scale infrastructure, for core manual operation in power distribution cabinets, motor control centers (MCCs), and ultra-high power equipment control panels.