This is a Katko change-over switch, a device designed to safely transfer power between two different sources, such as a main grid and a generator.Functionality: It features a manual rotary handle with ON1, OFF, and ON2 positions to control the power source connections.Safety Features: These switches often include interlocks to prevent both power sources from being connected simultaneously, and they are typically padlockable for added security during maintenance.Specifications: Similar models are rated for 3-phase power, with common configurations supporting 40A or 63A loads at voltages around 415V.Durability: The unit is housed in a yellow plastic or metal enclosure designed to withstand harsh industrial environments, often featuring an IP66 rating for protection against dust and water.