| 摘要 |
A voltage SAG protection device is provided to improve voltage drop immunity by preventing system shut down through a compensation voltage and time delay even in case of temporal voltage drop. A switch(120) performs switching for an external voltage. An AC/DC converter(130) performs AC/DC conversion by receiving a signal from the switch. A DC/DC converter(140) converts the AC/DC converted signal into a DC signal with a predetermined level. A voltage sensor(150) controls the switch by sensing a low voltage of the DC/DC converted signal. A compensation voltage supplying part(300) supplies a compensation voltage to the equipment in case of the voltage drop. A time delay part(400) delays a remote control signal outputted from the AC/DC converter in case of the voltage drop and then provides the remote control signal to the DC/DC converter.
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