Dual Mode: The automatic transfer switch supports both automatic and manual operation modes for simple and reliable performance. When a fault occurs in the primary power supply (such as loss of voltage or phase, with only phase A and neutral monitored), it automatically transfers one or more load circuits to the backup power supply to ensure continuous power. Quick Switching: The transfer switch provides fast switching with load power, ensuring safe transition under load. Maximum switching time is less than 2 seconds, allowing connected appliances to continue operating without interruption under normal conditions. Protection Functions: The switch includes protection against short circuits, overload, phase loss, and low voltage to enhance system safety and reliability. Easy Installation: Compact design with screw mounting allows for vertical or horizontal installation, making it easy to integrate into various power systems for reliable operation. High-Quality Materials: Constructed with flame-retardant PC housing for excellent insulation, heat resistance, and durability. Features silver contacts and brass motor coils to improve conductivity and extend product lifespan. Wide Application: Suitable for residential, commercial, and industrial use, especially in critical environments requiring uninterrupted power, such as hospitals, banks, and factories. Package Includes: 1 x Dual Power Automatic Transfer Switch Product Name: Dual Power Automatic Transfer Switch Material: Flame-retardant PC, brass, PCB, silver Current Rating: 100A Working Frequency: 50Hz Rated Voltage: AC 230V Operating Voltage: AC 220V Display: Indicator lights Operation Mode: Automatic and manual ATS Type: CB level Transfer Time: ≤2 seconds Utilization Category: AC-33iB Switching Mode: Automatic transfer and automatic return Compliance Standards: IEC 947-6-1, GB 14048.11 Working Principle: This dual power supply controller monitors the phase A and neutral (N) of both the main and standby power sources. In automatic mode, if the main power source (phase A and N) is within the normal voltage range (AC 190–240V), the controller connects to the main supply, and the main power indicator lights up. If the main supply fails (no voltage on phase A and N) and the standby supply (phase A and N) is normal, the system automatically transfers to the standby source, and the standby indicator lights up. Manual operation is possible regardless of input voltage by switching the mode to manual and using the handle to select power source: - Clockwise rotation connects the main power (N) and disconnects the standby (R). - Counterclockwise rotation connects the standby power (R) and disconnects the main (N).