This standard specifies the special terms for insulators. The terms used in insulators and related standards must comply with GB/T2900.1-92 "Basic Terminology of Electrotechnical Terminology", GB2900.19-82 "High Voltage Test Technology and Insulation Coordination of Electrical Terminology", this standard and Regarding the national standards for various professional terms in electrical engineering, any terms not specified in the above-mentioned standards can be specified in various standards and technical documents. This standard is mainly applicable to insulators used in electric power and communication overhead lines, power plants and substations, and can be used for formulating standards, compiling technical documents, compiling and translating professional manuals, teaching materials and books.