Insulators can be divided into suspension insulators and pillar insulators according to the different installation methods. According to the different insulation materials used, they can be divided into Porcelain Insulator, glass insulator and silicon insulator (also called Polymer Insulators). According to the different voltage grades, they can be divided into low voltage and high voltage insulators. The pollution insulators used in polluted areas are derived from different environmental conditions; DC insulators are derived from different types of use voltage; there are various insulators for special purposes, such as insulation transversal, semiconductor glaze insulators, tension insulators, wire insulators and wiring insulators for distribution. In addition, according to the breakdown probability of insulators, it can be divided into two types: A type non-breakdown insulator and B type breakdown insulator.