Automatic fire alarm receivers installed in disaster prevention centers and security offices receive signals from detectors and transmitters connected to each floor and building, display them, and send out alarms to the building, but it is possible that a failure due to lightning damage may prevent the alarm from being sent out. Also, if multiple buildings are being monitored, they are more susceptible to lightning surges, so countermeasures are necessary. Especially in the case of important facilities and cultural properties, failure or malfunction of automatic fire alarms due to lightning surges is not acceptable.
