Abstract: As one of the main equipment in the low-voltage power grid of the power system, the switchgear has the advantages of compact structure, convenient operation, and reliable structure. However, due to the large number of switchgear, it is affected by the climate, environment, and quality of operation and maintenance in various regions during the operation and maintenance process, resulting in a large number of missing and faulty switchgear equipment. Some switchgear defects involve a wide range of power outages, and some even require bus power outages, Due to the fact that the wiring methods of medium and low voltage power grids are mostly single bus segmented structures, bus power outages will cause large-scale power outages for customers, affecting normal production and daily electricity consumption. This article mainly analyzes and summarizes common faults in daily operation and maintenance work, and formulates corresponding control measures to ensure the safe and stable operation of the power grid.