As a main equipment of reactive power compensation in power grid

the safe and reliable operation of high voltage shunt capacitor has great significance to the power system. In this paper

the main structure of capacitor is introduced

the primary wiring and the specific connection diagram are deeply analyzed

the protection function and the selection standard of series reactor for the shunt capacitor as well as the protection of inner fuse are introduced. The setting calculation for current protection

voltage protection and bridge differential imbalance current of certain high voltage shunt capacitor is studied. The calculation method has reference significance for the protection setting of shunt capacitor.