Automatic transfer switch for 400V mains and generator systems, 4pole uninterruptible dual power switch with millisecond level conversion. Designed for rapid, reliable transfer between utility and backup power. Key benefits Fast, seamless transfer: Millisecondlevel conversion minimizes interruption when switching between mains and generator. Reliable dual power management: Keeps critical equipment powered by automatically selecting the active source. Improved conversion performance: PC grade isolation type design enhances conversion rates and electrical isolation. Compact and lightweight: 4pole configuration with a unit weight of 1 kg for easy installation in distribution panels. Clear compatibility: Designed for 400V systems and threephase installations that require a neutral conductor. Main features Models: 4P 80A and 4P100A to suit different current requirements. Function: Automatic mains to generator transfer with uninterruptible switch operation. Poles: 4P suitable for threephase plus neutral switching. Material: PC grade isolation type housing and internal isolation to support stable conversion. Performance: Millisecondlevel switching for minimal downtime during source changeover. Category: Switches for power transfer applications. Why customers need this product Prevents equipment downtime by providing rapid automatic transfer between power sources. Simplifies backup power integration without manual intervention. Reduces risk of process interruption in environments where continuous power is required. Practical applications Backup generator control for small commercial buildings and workshops where a compact automatic transfer switch is required. Industrial control panels and machinery that run on 400V threephase power and need fast switching between mains and generator. Telecom sites, server closets, or critical equipment rooms where short transfer times are to maintain operation. Specifications summary Voltage: 400V mains/generator Poles: 4P (threephase plus neutral) Current options: 80A and 100A models Unit weight: 1 kg Product type: PC grade isolation type for improved conversion rates Installation notes Intended for installation in compatible distribution panels by qualified personnel. Verify system voltage and current requirements before selecting between the 4P 80A and 4P100A models. This transfer switch provides a compact, fast, and reliable solution for automatic power source switching in 400V threephase installations where minimal interruption and solid isolation are required.