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WNTSH200-3，200A，AC400V，50/60HZ

The Schneider Electric WNTSH200‑3 is a low‑voltage automatic transfer/changeover switch designed to switch electrical loads between two AC power sources (e.g., main utility and backup generator) in three‑phase distribution systems.

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Specifications Parameter Specification Manufacturer Schneider Electric Product Type Automatic / Changeover Transfer Switch Model WNTSH200‑3 Rated Operational Current (Ie) 200 A AC Rated Operational Voltage (Ue) 400 V AC, 50/60 Hz (3‑phase) Network Type AC, three‑phase Poles 3 poles (3 phases) — may also include neutral switching depending on exact variant Utilisation Category AC‑33B (power changeover) compliant with IEC switching categories Standards IEC 60947‑6‑1 (transfer equipment) Rated Insulation Voltage (Ui) ~690 V AC typical for this class Impulse Withstand Voltage (Uimp) ~8 kV typical Short‑Time Withstand Current (Icw) Several kA for 0.1–1 s depending on upstream protection Contact Positions Typically 3 positions (Source 1 / OFF / Source 2) Control Modes Auto/Manual selectable; adjustable transfer delay (varies by controller type) Operation Modes Auto change with/without automatic return, mutual standby, manual Indicators Local position indication; optional remote signaling contacts (fault, successful changeover) Mounting Panel or enclosure mounting (fixed) Safety Features Mechanical interlock; mis‑connected neutral alarm (where applicable) Typical Applications Mains ↔ generator changeover, standby power systems, industrial power continuity