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CB Class Automatic Transfer Switch Output frequency: 50Hz Output type: 4Poles Output current: 300A Output voltage: 110V, 220V, 380V, 440V Output power: >500W Input voltage: 110V, 220V, 380V, 440V High reliability and safety Service life reaching above 8, 000 times Superior electro-magnetic compatibility CE- and CCC-approved Rated current: 300A Poles: 3Poles and 4Poles Suitable for shift of two-way power, transfer of load equipments and safe isolation Certifications: IEC60947-3 and GB14048.3 standards Product performance: The transfer switch is an integration of two miniature circuit breakers with a motor and a mechanical rotation device, which detects the two power supplies through the controller, and, when there is anything abnormal existing in the circuit, the controller will form a logical judgment upon the detection result. Then the operating mechanism will be driven according to the controller command to turn on or turn down the switch, so as to ensure a safe and reliable power supply for the load. Making and breaking capacity Use category Making and breaking test conditions Ac~33B L/Ie u/ue cΦs4 Power on time S Circulation period min Number of operating cycles 6.0 1.05 0.5 0.05 ≤5 12 Note:Uder the condition that Ac~33B is not operated frequently, the motor load may include the mixed load of the motor load and the ressistive load.