WATSNB-400/400 3P_Schenider_PRODUCT_吉林易择科技技术发展有限公司

The Schneider Electric WATSNB‑400/400 3P is a dual power transfer switch designed for switching a load between two independent AC power sources (such as utility mains and standby generator) in a three‑phase electrical system. It allows the electrical load to be transferred smoothly and safely between two supplies, ensuring continuity of service and protecting equipment. This 3‑pole version switches only the three phase conductors (without neutral) and is suitable for systems where neutral switching isn’t required. Typical installations include industrial panels, commercial power distribution boards, and backup power systems.

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DESCRIBE

Technical Parameters Parameter Description / Typical Value Model WATSNB‑400/400 3P Product Type Dual Power Transfer Switch Rated Current 400 A per source (line A / line B) Poles Switched 3‑pole (L1, L2, L3) – no neutral switching Number of Inputs Dual AC power sources (primary + backup) Switching Function Changeover between two supplies (manual/automatic) Control Type Rotary knob or selector switch (configurable) Rated Operational Voltage Typically 380–440 V AC (three‑phase) Rated Frequency 50/60 Hz Utilization Category AC‑33B (for making/breaking load currents) Insulation Voltage (Ui) ~800 V AC Impulse Withstand Voltage (Uimp) ~6–12 kV Short‑Circuit Making Capacity (Icm) ~20–40 kA (with/without upstream protection) Auxiliary Contacts Included for position feedback / remote indication Mounting Panel / enclosure mounting Operation Modes Manual, automatic, and interlocked Typical Applications Power continuity, mains/gen set changeover, industrial distribution

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