In this paper

five cases of shunt capacitor fault caused by improper use are introduced

which leads power supply wire faults

such as follows

improper switching of shunt capacitor

frequent tripping of temperature control equipment because of excessive operating temperature of the shunt capacitor

extreme low system power factor due to insistency between the replaced capacitor voltage and original capacitor’s voltage

overheat due to unqualified contactor for the capacitor and oil leakage of capacitor flange due to non-standard installation of capacitor. The reasons of such faults are analyzed

the treatment method and procedure as well as prevention measure to avoid the same fault are introduced for reference.