In this paper

one burnout accident of 10 k V dry type reactor is analyzed based on its external structure

operation environment

inspection

background protection information etc. It is found that frequent switching of capacitor bank causes the system to generate operating overvoltage

which inducing high current and partial discharge at the poor contacting location between the end of reactor winding and copper bar and

as result

leading burnout of reactor. The specific preventive measures are proposed so to assure stable operation of the reactor.