This paper counts the overheating defects of the power transmission equipment in EHV Power Transmission Company from January 2009 to May 2013. It analyzes the overall overheating cases in three aspects of the types

time and zones of the defects. It teases out the causes and the regular patterns of the overheating defects of equipment and generalizes the equipment and components which should be highly concerned. It proposes the targeted improvement measures combined with routine maintenance inspections

equipment overhaul and transformation

including standardized installation of equipment connectors

determining the process control standard of the key steps of the equipment connector installation and checking the current carrying capacity of the equipment wiring boards.