As a key connecting component between 35 kV and below cross-linked cables (XLPE) and oil immersed cables In a certain offshore wind farm in the East China Sea (case in 2023), the HSY-35-3.2 type intermediate joint operated for 2 years in an environment with a salt spray concentration of 5%, maintaining an insulation resistance of ≥ 1000M Ω (tested according to GB/T 3048.5) and no partial discharge phenomenon; The 35kV single core indoor terminal adopts an ultra-thin design (wall thickness 3.2mm ± 0.3mm), suitable for KYN61 switchgear, with an outer diameter of only Φ 110mm after installation (48% smaller than traditional epoxy conduit);