Features 1、The product support four operating functions, contain emergency manual operation, electric remote control operation, emergency power‑off operation under automatic control, and automatic control operation 2、The product using reliable mechanical and electrical interlock, safe and stable to use 3、Load isolation execution switch can ensure reliable operation of the main and standby power sources without interfering with each other, very practical 4、Come with obvious on‑off position indication, padlock and other functions to realize the safe isolation of power supply and load 5、Adopt mechatronics design, widely used in important power supply places such as fire fighting, hospitals, banks, high‑rise buildings, circuits that are not frequently connected and disconnected, and isolation circuits Specification Item Type: Dual Power Automatic Transfer Switch Model: SKT1-300A/4P Material: ABS, copper Shell frame grade current (Inm) 300A Rated current (In) 300 Conventional thermal current (Ith) 300A Rated insultion voltage of copper bar (Uj) 660V Rated impulse withstand voltage (Uimp) 12KV Rated operating voltage of copper bar (Ue) AC400 Rated operating current of copper bar (Ie) 300A Use category AC-33A Working Temperature: -20~45℃ (24-hour average should not exceed 35℃) Working Humidity: The average humidity at 40℃ shall not exceed 50%, and no condensation shall be allowed Altitude: Less than 2000 meters (if higher than 2000 meters, please use the product with a lower rating) Package List 1 x Switch 1 x Handle 2 x Isolation Board 1 x Screw Pack 1 x User Manual