Feature:1. [High Performance] Transfer switch adopts double row composite contacts, transverse pull structure, micro motor advanced energy storage and microelectronic control technology, could basically realize zero arcing.2. [4 Operation Modes] Power transfer switch has emergency manual, electric remote control, emergency disconnection under automatic control, and automatic control operation modes, more reliable.3. [Mechanical Interlock] The transfer switch is equipped with a mechanical interlock device to ensure the reliable operation of the main and standby power supplies without mutual interference.4. [Safety Design] With switch position indication, padlock, achieve safe isolation of power supply and load, support multiple protection functions, including short circuit, overload, phase loss and undervoltage, highly safe.5. [Wide Application] The switch can be used in home and public places, especially in office buildings and public places that need fire protection.Specification:Item Type: Dual Power Automatic Transfer SwitchMaterial: ABS, Aluminum AlloyModel: SJCSQ5 250 4PRated Working Voltage: AC400VControl Voltage: 220VRated Working Current: 250ARated Insulation Voltage Ui: 750VRated Limited Short Circuit Current Uimp: 70KVRated Short Time Withstand Current: 9kAUse Category: AC 33BRated Production Capacity: 10IeRated Breaking Capacity: 8IeRated Power: 50HZGrade: pcWorking Temperature: -20 to 45 (the average value in 24 hours should not exceed 35)Working Humidity: The average humidity at 40 shall not exceed 50% and shall not be dewed.Package List:1 x Dual Power Automatic Transfer Switch1 x Handle2 x Key12 x Bolt12 x Nut