Overview insulator in high voltage transmission and distribution system is the most widely used basic element for the charged portion of the insulation and support. Composite insulators, is the use of epoxy primer pull rod support, silicone rubber sheds outer insulating polymer composite insulators. The product with the traditional ceramics, glass insulators, compared with a light weight (only for the same purpose conventional insulator 1/4 to 1/8), high intensity (puller rods are high-strength tensile and flexural strength of porcelain more than 10 times), less resistant to contamination cleaning (silicone rubber has a unique strong hydrophobic) a significant advantage, while overcoming the conventional polymer materials aging life issues, can be used safely for decades, is to promote the use of electric power system whole new generation of products. Use and implementation of standards This product is used in AC 220kV and below power generation, transmission, substation, distribution system, used to live parts are insulated and support. The product model by JB/T9683-1999 "Insulator Model methodology" provides for the preparation, configuration parameters, perform JB/T5892-1991 "high voltage line with organic composite insulator technology" and JB/T8737-1998 "Composite Insulators for High Voltage Transmission Line Use Guidelines "standard. On the above criteria are not clearly defined the important parameters and configuration, according GB311.1-1997 "high-voltage power transmission equipment, insulation coordination" and GB/T5582-1993 "high voltage electrical equipment external insulation pollution level" requirements correction execution. Conditions of Use Ambient temperature: not higher than +40 ℃, not lower than -40 ℃; Altitude: not exceed 1000m; (1000m above may be amended GB311.1-1997) Power frequency: less than 100Hz; mechanical load: no greater than the rating of each product.