监控电源不正确引发的设备故障。电源不正确大致有如下几种可能：供电线路或供电电压不正确、功率不够(或某一路供电线路的线径不够，降压过大等)、供电系统的传输线路出现短路、断路、瞬间过压等。特别是因供电错误或瞬间过压导致设备损坏的情况时有发生。
Monitor equipment failure caused by incorrect power supply. There are several possibilities for incorrect power supply: incorrect power supply line or voltage, insufficient power (or insufficient wire diameter of a certain power supply line, too large voltage reduction, etc.), short circuit, open circuit, instantaneous overvoltage, etc. in transmission line of power supply system. In particular, equipment damage caused by power supply error or transient overvoltage occurs from time to time.
解决方法：在监控系统调试中，供电之前，一定要认真严格地进行核对与检查，绝不应掉以轻心。
Solution: in the debugging of monitoring system, before power supply, check and check it carefully and strictly, and never take it lightly.