Feature: 1. Two Unit Miniature Circuit Breaker: The automatic transfer switch is composed of two unit miniature circuit breaker and accessories (auxiliary contact, alarm contact), mechanical interlocking transmission, controller and other components. 2. Mechanical and Electrical Interlocking: This automatic transfer switch has mechanical interlocking and electrical interlocking functions, can be switched by reliability, can be powered manually or automatically, and the rated current of universal and standby circuit breakers can be different. 3. Stable Performance: This switch has small size, simple structure, easy operation, long service life, superb craftsmanship, isolation anti interference and stable performance. 4. No Noise: The transfer switch is driven by a single motor, noiseless and low impact, equipped with user terminals to reflect the breaker status (open or closed), with various indications on the panel. 5. Wide Application: Our automatic transfer switch is suitable for lighting and small motor control equipment. It is widely used in homes, shopping malls, factories, laboratories, farms and other situations. Specification: Item Type: Double Power Automatic Transfer Switch Material: PC Rated Voltage: 400V Frequency: 50 or 60Hz Number of Poles: 4 Segmentation Capacity: 35KA ATSE: CB grade Rated Current: 63A Working Principle: This series of dual power supply controller and drive mechanism power supply signal depends on the A phase and N line of the common switch or standby switch inlet port. Dual power supply in automatic state, when the incoming phase A and N common switch voltage is normal (AC190 to 240v), the common switch will be closed in priority regardless of whether the common power B.C and standby switch a.b.c, N voltage is normal. At the same time, the power supply indicator and the common off indicator light up. When the incoming public switch A phase and line N have no voltage, and the incoming standby switch A phase and line N have normal voltage, the dual power supply turns to standby closure regardless of whether the normal switch B and standby switch C have normal voltage. The power indicator and standby closure indicator are on. Manual function, regardless of whether the voltage of normal power supply and standby power supply is available or not, manual operation mode can be used. For manual operation, the manual automatic button should be placed in the manual operation position. Push the handle to rotate clockwise to the terminal, the standby power vac open R open, the common power vac open N close. When pushing the handle to rotate counterclockwise to the terminal, the standby power switch R closes and the public power switch N opens.. Package List: 1 x Dual Power Automatic Transfer Switch1 x User Manual