To meet the need of miniaturization of HV switchgear
145 kV SF6 gas insulated composite mini-bushing was taken as the design object
and a physical model of the whole bushing was built according to the requirements of the standard and engineering.The internal and external insulations of the mini-bushing were calculated
and its electric field was analyzed by the finite element method to determine the insulation structure.Test was conducted on the prototype
and the results indicate that the miniaturization design of the 145 kV SF6 gas insulated composite bushing is rational