AC power without power transistor switching circuit

Posted on Mar 28, 2007

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 switching immediately. Automatic switching circuit using a transistor as shown, the

AC power without power transistor switching circuit
Click here to download the full size of the above Circuit.

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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