Using AC power without power transistor switching circuit a

  
AC-DC power supply without power switching circuit normally used for lighting load circuit, once the power grid or power is restored, the standby power supply automatic switchi
Using AC power without power transistor switching circuit a - schematic

ng immediately. Automatic switching circuit using a transistor as shown, the automatic switching time less than Is. Figure (a) applies to straight stream 12V standby power supply; Fig. (B) for DC 24V standby power supply; FIG. (C) For AC backup power.




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