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Dual power supply, is integrating switch and logic control, without additional controller, achieve the automatic switch of mechanical and electrical integration, detecting voltage, frequency, communication interface, electrical and mechanical interlock, and other functions, can realize automatic emergency manual control, electric remote,. Operation is made up of logic control board in a variety of logic commands to manage the operation of motor, gearbox for motor drive switch spring energy storage, the acceleration of the instantaneous release mechanism, fast through breaking circuit or circuit transformation, by visible state security isolation, greatly improve the electrical performance and mechanical performance. Switch is suitable for the power supply system of the main power and standby power automatic conversion or two sets of equipment for load automatic conversion, security isolation ?, etc