Specifications Parameter Specification Device Name Schneider Electric WATSNA 4P 63A CB Automatic Transfer Switch (ATS) Product Family WATSN (Automatic Transfer Switch) Type Dual‑source Automatic Transfer Switch (ATS) Poles 4P (three phases + neutral) Rated Current (Ie) 63 A AC continuous rating Rated Operational Voltage (Ue) 380 / 400 V AC, 50/60 Hz (typical three‑phase low‑voltage grid) Network Type Three‑phase AC (50/60 Hz) Standard Compliance Conforms to IEC 60947‑6‑1 for transfer switching functions Control Modes Automatic transfer with auto return, automatic without auto return, and mutual standby (configurable locally) Breaking Capacity Class CB (circuit breaker class switching and breaking capability) Rated Insulation Voltage (Ui) ~440 V AC (typical for devices in this range) Rated Impulse Withstand Voltage (Uimp) ~8 kV (typical surge withstand) Short‑Circuit Withstand/Peak Up to ~17 kA peak (varies by exact unit configuration) Mounting Panel/rail or fixed mounting (depending on panel design) Integrated Functionality Voltage sensing, automatic switching logic, status indication, optional alarms/remote functions