YCQ1B Dual Power Automatic Transfer Switch A dual power automatic transfer switch (ATS) is a device used in electrical systems to automatically switch between two power sources. It ensures a seamless and uninterrupted power supply by monitoring the availability and quality of the primary power source (often the utility power) and the backup power source (such as a generator). The ATS is typically installed between the power sources and the electrical load. It constantly monitors the primary powe