ATyS d S products are 4-pole remotely operated transfer switches equipped with positive break indication for clear and reliable status visibility. They enable on-load transfer between two three-phase power supplies through remote volt-free contacts, controlled either by an external automatic controller using pulse logic or via a switch-based command. Designed for low-voltage power systems, these devices are suitable for applications where a brief interruption of the load supply is acceptable during source changeover, ensuring dependable and controlled transfer performance.