Rail Type YMW4220A Transfer Switch 2 Sections 3 Gears Rotary Dual Power Switch Key benefits Simple and reliable manual transfer between two power sources using a three gear rotary control. Ideal where automatic switching is not required but positive, visible source selection is needed. Dual section design lets you control two circuits independently in a single, compact module, reducing space and simplifying wiring. Rail type mounting provides straightforward installation on equipment rails and panels, saving time during assembly or retrofit. What it does and why you need it Provides a clear, mechanical way to switch load supply between two power inputs and an off or neutral position, helping maintain service continuity during outages, maintenance, or equipment changes. Reduces the risk of backfeeding by isolating one source before connecting the other through a dedicated rotary transfer action. Suited for applications where a dependable manual switching method is preferred over electronic or automatic systems. Features and important attributes Model YMW4220A, rail type, 2 sections, 3 gears rotary design, dual power transfer switch. Rated for 20A operation as indicated by model designation YMW4220A. Compact railmounted enclosure for neat installation and easy access. Mechanical rotary actuator gives tactile position feedback so users can confirm source selection visually and by feel. Two separate sections allow independent switching of two circuits while maintaining a single mounting footprint. Compatibility and applications Compatible with common power setups such as mains and backup generator, mains and inverter, or two independent supply lines in small installations. Suitable for integration into distribution panels, control cabinets, and modular power systems that accept railmounted components. Practical use scenarios Home backup power: Manually switch household critical circuits from mains to a standby generator during a power outage while keeping circuits separated. Small commercial site: Use the dual section switch to manage two separate loads or zones, enabling independent transfer to an alternative supply without additional mounting space. Offgrid or hybrid systems: Provide a manual transfer option between grid and inverter or generator inputs where automatic transfer is not required. Installation and operation notes Designed for rail mounting to simplify installation in standard panels and enclosures. Mechanical rotary operation requires manual movement to select source; confirm correct gear position before applying load. Use appropriate wiring practices and circuit protection consistent with system requirements and local electrical codes. Model reference Rail Type YMW4220A Transfer Switch 2 Sections 3 Gears Rotary Dual Power Switch This transfer switch offers a straightforward, space efficient solution for manual dual power selection in small to medium installations where reliable, visible switching and independent control of two circuits are important.