The Schneider Electric WATSN160B/4A Automatic Transfer Switch (ATS) is a four‑pole changeover device used in low‑voltage AC power systems to ensure continuity of electrical supply. It performs automatic and manual switching between two independent power sources, such as a utility mains and a standby generator, to maintain uninterrupted power to connected loads during supply disturbances.
Parameters
Parameter Specification
Product Name Schneider Electric WATSN160B/4A Automatic Transfer Switch
Device Type Automatic Transfer Switch (ATS)
Series WATSN
Number of Poles 4 Poles (three phases + neutral)
Rated Operational Current (Ie) 160 A
Rated Operational Voltage (Ue) 400 VAC, 50/60 Hz
Network Type AC three‑phase
Rated Insulation Voltage (Ui) ~800 VAC
Rated Impulse Withstand Voltage (Uimp) ~8 kV
Utilization Category AC‑33B for switching motor and resistive loads
Switching Class PC class transfer switch
Contact Position Indication Yes
Mechanical Interlocking Yes
Control Type Basic automatic transfer logic
Mounting Mode Rack‑ or panel‑mounted
Connection Type Screwed (bottom and top)
Short‑Circuit Making Capacity (Icm) ~17 kA
Rated Short‑Time Withstand Current (Icw) ~10 kA for 60 ms
Mechanical Durability ~10 000 cycles
Electrical Durability ~6 000 cycles
Isolation Capability Provides full isolation in OFF position
Typical Applications Power continuity and backup systems in industrial and commercial installations