ATS Dual Power Switch

STQ2-63 63A 4P CB Class Auto Transfer Switch 110V/220V - Three-Phase+N ATS for Hospitals & Cold Storage

The STQ2-63-4P is a CB class automatic transfer switch for three-phase systems with neutral (3L+N), rated at 63A and supporting both 110V and 220V AC. By switching all four poles 鈥?three phases and neutral 鈥?simultaneously, it enables use with mixed three-phase and single-phase loads in the same installation, making it well suited for facilities such as hospitals, cold-storage plants, and data centers where neutral is essential for balanced distribution. Built-in mechanical interlock physically prevents both power sources from connecting at the same time. Additional over-voltage and under-voltage protection continuously monitors the supply for an extra layer of safety. When Normal Power (N/mains) fails, the unit transfers to the backup supply (generator or PV inverter) in approximately 2 seconds; a brief ~2s outage occurs during switchover. Once mains is restored, it reverts to Normal Power priority automatically. Maximum load capacity is approximately 13.9kW (13870W).

Samples available · OEM pricing on request · Ships worldwide