Application of Fast Interlocking Switching Between Mains Power and UPS Power Supply in Field of Uninterruptible Power Supply
In response to the situation where the backend communication equipment still needs to work in case of abnormal mains power or sudden power outage,a fast interlocking switching circuit between mains power and UPS power supply is designed.This circuit has a fast detection function for AC abnormal power loss.The municipal solid state relay and UPS solid state relay drive have a hardware and software dual interlocking mechanism,which can reduce the probability of misoperation of UPS power supply and municipal power output simultaneously.The microcontroller circuit can quickly respond to drive the UPS solid-state relay and the mains solid-state relay,allowing their mains or UPS power to be supplied to the backend AC equipment.Compared with traditional AC relay switching for mains UPS or AC grid connection technology,this technology has the advantages of software controllability,safe and reliable interlocking between mains and UPS,simple circuit,and low cost.
abnormal mains power supplymains power and UPS power supplyrapid detectioninterlocking mechanism
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