In GIL

gas barrier insulator plays the key roles of separating gas compartments and providing a contamination barrier and insulation to the ground.It is very important to develop reliable 1 100 kV GIL gas barrier to ensure the safe service of 1 100 kV GIL.Applying finite element software

its dielectric performance and mechanical performance are computed

results show:through the optimization of its insulation design

remove the grounding shield ring can effectively reduce the electric field strength in the triple zone;the cone is completely surrounded by a particle trap which is electrically bonded to the enclosure

in order to trap particles moving under the influence of gravity.The 1 100 kV spacer passed its type test successfully in High Voltage Apparatus Quality Test & Research Center

its lightning pulse withstand voltage reaches 2 400 kV and its burst pressure reaches 3.45 MPa

showing that its dielectric performance and mechanical performance have a larger margin.