Feature: 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, copperShell frame grade current (Inm)300ARated current (In)300Conventional thermal current (Ith)300ARated insultion voltage of copper bar (Uj)660VRated impulse withstand voltage (Uimp)12KVRated operating voltage of copper bar (Ue)AC400Rated operating current of copper bar (Ie)300AUse category AC-33AWorking 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 Switch1 x Handle2 x Isolation Board1 x Screw Pack1 x User Manual Note: 1. The left and right mounting brackets of the transfer switch must be fixed on the same flat surface. Please adjust the installation hole size according to the actual situation. It is strictly forbidden to use the wrong hole size to forcibly install the switch. This will cause the internal deformation of the switch and even directly damage the switch.2. It is recommended to use the busbar for the switch above 2000A. If the cable is used for installation, it will increase the force of the mounting bracket. Please add effective reinforcement measures.3. Vibration and Gas: In its use environment, there should be no strong vibration or impact, and no harmful gas should corrode the metal and damage the insulating material.4. Surrounding Materials: There must be no serious dust, conductive particles or explosive dangerous substances.5. Please note that the new type and old type of this product will be sent randomly,and make sure you will not mind before ordering.