Orient 500KV polymer strain insulator in silicone rubber is made of one-piece housing, and FRP rod & end fitting with Minimized electrical field strength, so the composite suspension insulator has maximized service life.

500KV polymer strain insulator in silicone rubber Minimized electrical field strength:
After numerous electrical calculations regarding E-field distribution along the 500KV polymer strain insulator in silicone rubber, and the connection zone on the high-voltage side in particular, the design of the 3FL composite suspension insulators were optimized for maximum reduction of electrical field stress, reduced corona effect, and minimized RIV4 value.

Two design keys ensure improved life expectancy by reducing electrical field stress in the triple point and on the silicone surface:
The spherical-shaped rim of the end fitting inside the housing homogenizes the E-field distribution on the high-voltage side of the 500KV polymer strain insulator in silicone rubber with an integrated grading ring up to the much high voltage. The overmolded design system and the silicone housing shape at the connection zone reduce the electrical field strength inside the housing, at the inner triple point in particular, as well as on the silicone surface directly.

Reducing the electrical field strength is by displacing the higher electrical field strength outside the 500KV polymer strain insulator in silicone rubber housing (i.e. to the surrounding air area), and by taking advantage of the higher silicone relative permittivity.

Composite suspension insulators can be applied on 500kV systems with the need for additional two grading/corona rings.

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