SYSTEM FOR PROTECTING VOLTAGE SAG USING SIGNAL DELAY AND REMODELING METHOD THEREOF

摘要

In the instantaneous power failure prevention system using the signal delay according to the present invention, the power supply system in the equipment for supplying power to the equipment, which is connected to an external power source, the relay of the switch to turn on and off the connection to the external power supply A power box including an interlock circuit connected to a power supply device, an AC / DC converter generating a stop signal when detecting a voltage drop of the power supplied from the power box, and the stop signal from the AC / DC converter A DC / DC converter for stopping power supply to the equipment upon receiving a signal, and a signal delay device for delaying the stop signal transmission from the AC / DC converter to the DC / DC converter for a predetermined time. Even if a momentary power failure occurs within a specified time, the equipment is not stopped.;Instantaneous voltage drop, instantaneous power failure prevention, signal delay device, interlock circuit