Specifications Parameter Specification Manufacturer Schneider Electric Product Family TransferPacT / WATSN Automatic Transfer Switch Model Series WNTSA / WATSN‑class (frame for 160 A) Device Type Automatic Transfer / Changeover Switch (ATS) Poles 4P (three phases + neutral) Rated Operational Current (Ie) 160 A at 60 °C (continuous) Rated Operational Voltage (Ue) 400 V AC, 50/60 Hz Network Type AC three‑phase Transfer Switch Classification PC class changeover switch / ATS Utilisation Category AC‑33B (suitable for power changeover) Contact Positions 3 mechanical/electrical positions (e.g., Source1 / Off / Source2) Signal Contacts Options such as 1 NO + 2 NC, 1 NC + 2 NO, or 2 NO for remote status reporting Rated Insulation Voltage (Ui) Switch: ≤800 V AC; Controller: ~500 V Rated Impulse Withstand Voltage (Uimp) 8 kV (switch), ~6 kV (controller) Short‑Circuit Making Capacity (Icm) ~154 kA with upstream protection (400 V AC) Short‑Time Withstand (Icw) ~10 kA for 0.1 s Mechanical Interlocking With mechanical interlock for safe switch transitions Mechanical Durability ~10,000 cycles Mounting Fixed plate or DIN‑rail support Control Type Rotary knob / selector switch with automatic and manual modes Locking Options Padlockable OFF position for safety Protection Degree IP40 front (auto mode) / IP20 inside enclosure (manual) Temperature Range ‑25 °C to +70 °C (operation) Standards & Compliance IEC 60947‑6‑1, CE, CB, CCC certifications