The Schneider Electric WATSN 4‑pole 250 A Automatic Transfer Switch (ATS) is a dual‑power source changeover device designed for low‑voltage AC electrical systems.
Parameters
Parameter Specification
Product Name Schneider Electric WATSN 4P 250A Automatic Transfer Switch
Device Type Automatic Transfer Switch (ATS)
Series WATSN
Number of Poles 4 (Four Pole)
Rated Current (Ie) 250 A
Rated Operational Voltage (Ue) 380–415 VAC (three‑phase, 50/60 Hz)
Network Type AC
Control Type Automatic and Manual transfer modes
Supported Power Sources Utility and Backup (e.g., generator)
Switching Function Changeover between two independent AC sources
Rated Insulation Voltage (Ui) Up to ~800 VAC typical for ATS design
Rated Impulse Withstand Voltage (Uimp) ~8 kV typical ATS class
Utilization Category AC‑33B (switching of motor and resistive loads)
Mounting Panel/Enclosure mount
Applications Continuity of power for critical load circuits, industrial and commercial electrical panels