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SPEEDCON SERIEs double power automatic transfer switch adopt the advanced electromagnetic product that successfully researched and developed by latest technologies. This series switches are suitable for rated insulating voltage 800VAC or 250VDC, rated current 20-5000A and rated frequency 50/60HZ. The switch is used in the infrequent on and off circuit. It mainly used in such sites as high-rise building, post & communication, fire protection, military establishments, coal mine zone, vessels, elevators, industrial stream lines which need the uninterrupted power. Under the inevitable trend of dramatic increasing demand for municipal power, they can meet the higher requirements for the power utilization reliability. The main features included cabinet size, easily control, fast switch, reliable performance.