Automatic transfer switch is a high-tech product developed by our company，Comply with GB/T14048.11Standards, also in line with 《Fire Protection Code for High-Rise Civil Buildings》 , 《 Emergency Lighting Design Guidelines》etc.The parts and components of the product have undergone strict aging and screening. The finished product has been energized and aged at a continuous high temperature for 24 hours, and finally passed the loading inspection before leaving the factory. Thus ensuring the reliability and safety of the product .Suitable for AC 400V and below, rated frequency 50Hz. In the power supply, there is phase loss, overvoltage, Under the control of the controller, the transfer switch can quickly change the load from the common power supply to the backup power supply (the backup power supply must be normal at this time) in the case of fault conditions such as undervoltage. The user can also put the load in an intermediate position when needed, so that the load is neither connected to the normal power supply nor to the standby power supply.This product is mainly used for the primary and secondary loads specified by the state, and is widely used in fire-fighting, post and telecommunications Information, hospitals, hotels, urban rail transit,high-rise buildings, industrial assembly lines, television stations, etc.Places with continuous power supply. Commonly power sources can be power grids, self-starting generator sets, battery packs, etc.

□ Ambient air temperature: ambient temperature -5℃ to +40℃, and the 24-hour average temperature value does not exceed Over +35° C.Users whose ambient air temperature is higher than +40° C or lower than -5°C should consult with the manufacturer.

□ The highest temperature of atmospheric humidity: when the degree is +40℃ , the relative humidity does not exceed 50%, and the maximum relative humidity per month Degree 90%, resistant to the influence of humid air on the sea, and can allow higher relative humidity at lower temperatures , special measures should be taken for the occasional condensation caused by temperature changes.

□ Installation altitude: The altitude of the installation site does not exceed 2000 meters. When used at higher altitudes, the dielectric strength and cooling effect of the air should be considered to be reduced, please consult with the manufacturer.

□ Pollution level: The environmental pollution level of the installation site is level 3 .

□ Installation category: IV .

□ Installation inclination: the product is fixedly installed in the cabinet, the maximum inclination is ±22.5° .

□Arcing distance: The arcing distance is 30mm when AC 400V. The arcing distance when AC 690V is 60mm.

□ Use category : AC-33iB .

Inspection and maintenance must be carried out by professionals. All external power supplies should be cut off during inspection and maintenance. In order to maintain the performance of the power switch and keep it in good condition, the first maintenance inspection shall be carried out within one year after installation, and regular maintenance shall be done at least once a year thereafter.