An uninterrupted power supply switching circuit and uninterrupted power supply

Abstract

The utility model discloses an uninterrupted power supply's switching circuit and uninterrupted power supply of power supply technical field, including main power supply and backup power supply, the main power supply is 220V municipal power, the output of main power supply connects the first end of button switch, the second end of button switch is connected with BMS module, first voltage detection circuit and the first end of first electric leakage protection switch respectively. The utility model discloses through setting hysteresis comparator, can stabilize the output voltage of first voltage detection circuit, prevents the voltage critical point of first voltage detection circuit output and is advantageous to guarantee that the frequency of the pulse generator generates the pulse and the switching number of main power supply, backup power supply is synchronous to guarantee the accuracy of power switching number record result, is advantageous to the routine maintenance of uninterrupted power supply, can obtain the actual use data of power supply power supply according to the switching frequency, thereby effectively guaranteeing the reliability and stability of UPS power supply.

Images