Fushun Aluminum Plant's new electrolytic production is controlled by a microcomputer. It is mainly responsible for the normal production of 208 200kA large-scale prebaked electrolyzers, including shelling, blanking, anode lifting and main effect alarms. Since the electrolytic tank is provided with a tank cover plate, when the electrolytic tank has an effect, the tank temperature is too high and the electrolyte shell will be melted. When the electrolyte aluminum water overflows the electrolytic tank at a temperature as high as 900° C., the cathode busbar is easily damaged, resulting in production. ACCIDENT. To this end, the plant technicians after more than a dozen tests, and finally developed a successful security alarm, the plant a total of eight production areas, set up eight alarms. Each alarm operates independently. Once the electrolysis cell has an effect, an alarm sounds and the red effect light flashes immediately. After one month of operation test, the alarm effect of the alarm is very good, which provides a powerful guarantee for the safety of new electrolytic production.