An Auto Phase Selector (APS) with protection for under voltage and over voltage is a crucial device designed to ensure the stability and safety of electrical systems.

The primary function of the APS is to automatically select the optimal phase from the available power sources, guaranteeing a balanced and reliable power supply. Simultaneously, it incorporates protective mechanisms to guard against under voltage and over voltage conditions. In the event of under voltage, the APS prevents potential damage to connected equipment by intelligently switching to a more stable phase.

Conversely, during over voltage situations, the device acts as a safeguard by swiftly disconnecting from the affected phase, preventing voltage spikes from causing harm to sensitive electrical components. This integrated protection enhances the overall resilience of electrical systems, promoting efficient and secure operation in diverse power supply scenarios.