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- W2371496955 abstract "Since SF6 gas is defined as one of six greenhouse gases,and most of existing cubicle-type gas-insulated switchgears(C-GIS)take SF6 gas as insulating dielectric,it has been an urgent problem in the switchgear field to develop gas-insulated switchgear with lower-SF6 content,which can reduce or eliminate the usage of SF6 gas.The 3D gas chamber model in switchgear is established based on the current 40.5 kV SF6 C-GIS;and the related electrical features are calculated,including voltage distribution,current carrying temperature-rise and electrical field intensity.And then,the structural optimization for existing problems is done.The mixed gas of 30%SF6-70%N2 under 0.15 MPa is selected as insulating dielectric for the switchgear chamber.And the simulation results indicate that electrical field intensities in the chamber decrease markedly after structural optimization,the max electrical field intensity at isolating break,grounding break and isolating drawbars of the vacuum interrupter decline from 7.28,7.81,8.24kV/mm to 5.05,5.03,4.21kV/mm,and the highest temperature in the chamber is 67 ℃ under 1.1times of rating current.A 40.5kV C-GIS prototype with lower-SF6 content is presented based on the above-mentioned researches.And the powerfrequency withstand voltage test,lighting impulse voltage test and temperature-rise test are applied to the prototype.The test results show that there is no flash-over in the tests,the temperature-rise can meet the national standard demands,and the prototype past the type-tests successfully." @default.
- W2371496955 created "2016-06-24" @default.
- W2371496955 creator A5011644670 @default.
- W2371496955 date "2015-01-01" @default.
- W2371496955 modified "2023-09-27" @default.
- W2371496955 title "Prototype development of 40.5kV low-SF_6 content gas insulated metal enclosed switchgear cabinet" @default.
- W2371496955 hasPublicationYear "2015" @default.
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