LI Haifeng, WANG Bangtian, SUN Pengcheng, SUN Guangtao, WANG Junwei

 

(XJ ELECTRIC CO., Ltd, Xuchang 461000, China)

 

 

Abstract: Aiming at the insulation level and mechanical properties of medium voltage switchgear were decreased in higher altitude, and the elevation influence on the properties of medium voltage switchgear was studied. The test mothed and technical problems of medium voltage switchgear in higher altitude were also analyzed in this paper. From the analysis dates, combined with the domestic design and manufacturing experience, the technical requirements and selection thinking of medium voltage switchgear in higher altitude were proposed. The results indicate that the medium voltage switchgear can meet the needs of application in high altitude with full condition, strengthen insulation, increasing the creepage distance, choice the components through the environmental test etc. The result will supply the design and type selection of medium voltage switchgear in high altitude.

 

Key words: electrical properties; insulation level; creepage distance; correction factors