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Heavy wetting flashover may occur during live-line washing or torrential rain.  A large volume of polluted water flowing down one side of an insulator can bridge much of the leakage distance. It occurs predominantly on large bushings and post insulators where the sheds are closely spaced and are all the same diameter.

Icing flashover occurs when there is heavy snow or ice build up on the insulator skirts. When the temperature starts to rise above freezing, the melting droplets start a stream of water that can induce a flashover.

The booster shed breaks up long cascades of lightly contaminated water. HVBS cools, compresses and extinguishes discharges which run between it and the porcelain insulator. It also acts as an arc-chute or expulsion tube to eject heavy current arcs from its underside.

Superior high-voltage outdoor materials are used in the Booster Shed design. The rugged, non-tracking, UV-resistant, high temperature polymer ensures long-term performance even in the most extreme environmental conditions.


  • Works on all voltage classes
  • Designed to prevent icing and heavy wetting induced flashovers
  • Custom design
  • REACH and RoHS Compliant


Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Material System  Crosslinked Polyolefin

  • Technology  Cold Applied De-energised

  • Insulator Type  Porcelain/Glass


  • Insulator Core Diameter Range (mm) 94 – 114, 140 – 160, 237 – 257, 297 – 317, 325 – 345, 385 – 405, 431 – 451, 464 – 484

  • Insulator Core Diameter Range (in) 3.7 – 4.4, 5.5 – 6.3, 9.3 – 10.1, 11.7 – 12.5, 12.8 – 13.6, 15.2 – 15.9, 17 – 17.8, 18.3 – 19.1


  • Halogen Free  Yes

Product Availability

  • Product Availability  Worldwide

Related Materials

Datasheets & Catalog Pages

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