The porcelain bushing is a hollow porcelain insulator, which is glued with the flange. Some are inserted through the guide rod, some are filled with insulating gas, and some are installed with valve pieces or different insulating media to form an electrical product, which is used to pass through the wall and box for support and insulation. There are many kinds of electrical porcelain sleeves: wall bushing, transformer bushing, SF6 circuit breaker bushing, capacitor bushing and lightning arrester bushing.

Porcelain bushing can be made into porcelain bushing products of different specifications according to different voltage levels and strength requirements. It has the characteristics of long service life and no aging. It is a common supporting facility for electrical products.