SCHNEIDER ELECTRIC WATSN400/4A
SCHNEIDER ELECTRIC WATSN400/4A is PC-class automatic transfer switch (ATS), rated 400A, 4-pole with A-type controller for low voltage dual power distribution systems. This automatic transfer switch continuously monitors voltage and frequency of normal and standby incoming power sources. The automatic transfer switch automatically switches load to standby supply upon main power failure or abnormality to maintain uninterrupted power for critical equipment. The automatic transfer switch is equipped with mechanical and electrical interlock to prevent parallel connection of two power sources. The automatic transfer switch serves as core power switching spare component for power cabinet maintenance and emergency power supply retrofit.

This WATSN400/4A unit is rated AC-33B utilization category for mixed motor and resistive loads, working under 400V AC 50/60Hz. WATSN400/4A supports overvoltage, undervoltage and phase loss detection, with manual operation function for maintenance. WATSN400/4A has contact position indicator and optional auxiliary contacts for remote status feedback. WATSN400/4A meets IEC 60947-6-1 standard, widely applied in marine switchboard, data center, hospital and industrial plant emergency power panels.

As reliable low-voltage power switching device, this SCHNEIDER ELECTRIC ATS ensures secure and fast source transfer under frequent power cutover. SCHNEIDER ELECTRIC WATSN series transfer switches are widely deployed for essential load backup power systems. SCHNEIDER ELECTRIC electrical spare parts include control boards, motor actuators and auxiliary contact accessories for switchgear overhaul. SCHNEIDER ELECTRIC PC-class automatic transfer switches are trusted replacement units for dual-power supply distribution panels.