Power failure not only affects life but also destroys good mood. Our dual-power automatic transfer switch can help you solve this problem. Made of plastic, red copper, and silver contacts, this sturdy product has strong electrical conductivity, allowing for long-term use. The fast conversion between normal and standby power supplies allows you to live a more convenient and comfortable life without worrying about power failure.  Key Features ●Build to Last: High-quality plastic, red copper, and silver contacts make the product have strong electrical conductivity, solid, and durable, so it can keep practical without frequent replacement. ●Good Performance: Adopting the PCB circuit board and pure copper coil motor, this product has stable, reliable, and safe performance with low noise. ●Convenient Life: This switch can be used to detect whether the power supply is normal, achieve the conversion between normal power supply and standby power supply in a short time(＜0.05s), and ensure your normal use in the event of a power failure while the computer monitoring does not shut down. ●Easy to Use: Two operating modes (automatic+manual), hand switch handle, clear prompts, indicator lights, and detailed manual ensure that you can easily use it. And it's accessible to signal light for easy observation outside the box. ●Flexible Installation: With a 1.37" DIN rail installation and clip design, this product can be installed horizontally or vertically, fully meeting your needs. ●Effortless Cleaning: Thanks to its closed design that effectively avoids dust and water vapor infiltration and the smooth surface, you can clean the residue with a towel. ●Solid Back Plate: The enlarged back plate with a 1.37" rail design increases the contact area with the wall, making it more secure and convenient to hang on the wall. Application It is suitable for AC 50/60HZ, rated voltage 400V, rated current below 100A (2-wire)- live wire, a neutral wire, dual power grid, etc. The normal power source is municipal power or UPS, while the standby power source can be a municipal generator, solar power, inverter, and UPS. It can only be applied to public utilities or generators.  Specification  Model: Q4-125/3P Color: White Style: Modern Shapes: Rectangular Number of Items: 1 Material: Plastic, Red Copper, Silver Type of Installation: 35mm/1.37inch DIN Rail Mount Type: Horizontal or Vertical Switch Type: Secondary Distribution Operation Mode: Automatic and Manual Display Function: Indicator Light Display Electrical Level: PC Level Isolation Type Pole: 3P Use Level: AC-31B Rated Current: 100A Rated Voltage: AC 400V Insulation Voltage: AC 690V Rated Frequency: 50Hz/60Hz Contact Capacity: AC220V 50Hz Rated Short Circuit Current: 50kA Rated Impulse Withstand Voltage: 8kV SCPD (Fuse): RT16-00-63A Service Life: Electrical: 2000 Times; Manual Opereation: 5000 Times Rated Control Voltage Us: AC220 V 50Hz Normal Working Conditions: 85% Us-110% Us Auxiliary Circuit: 2 Independent Relays, Each Containing 2 Sets of Transformer Contacts Touch Time: <50ms Return Time: <50ms Power-off Time: <50ms Conversion Time: <50ms Rail Length: 35mm/1.37inch Product Size: 12.4*9.5*7.1cm/4.88*3.74*2.8inch Package Size: 15*10.5*8.5cm/5.9*4.13*3.34inch Gross Weight: 0.7kg/1.54 lbs  Package Included 1* Dual-power Automatic Transfer Switch 1* English Manual Notes 1.Please pay attention to the size of the junction box before purchasing to prevent it from closing properly. 2.This product cannot replace batteries. 3.Please note that the switch cannot turn the generator on or off. 4.This product belongs to electrical maintenance and installation, so it is important to ensure that the operator holds electrician qualification and takes necessary power off and insulation protection measures. 5.The normal/standby power supply should be an AC 400V power supply. If it is a DC or low-voltage power supply, you need to use an inverter to convert it into an AC 400V power supply. During the conversion process, the coil can operate normally at 85% -110% of the rated working voltage. If the voltage in the coil is too low, it may cause the coil to heat up. 6.Please check the integrity of the ATS before installation, turn the ATS on or off with the operating handle, check the flexibility of the transmission, and detect the normal and backup power load generation and disconnection conditions at each stage. 7.A switch with a leakage protection function cannot be installed on the upper end of the dual-power switch. If necessary, it can be installed on the lower end of the dual-power switch, otherwise, the switch will frequently trip. 8.In automatic mode, forcefully turning the power switch handle will damage the transfer switch. In manual mode, it should be manually switched to power by rotating the handle. 9.When the normal power supply and standby power supply are powered, the switch will give priority to using the normal power supply.