Comparison of advantages and disadvantages between glass insulator and porcelain insulator: glass insulator the insulator device is made of glass, which is called glass insulator; At present, toughened glass insulators are most widely used in transmission lines. Porcelain insulator is made of electrical ceramics. Ceramic insulator is the earliest insulator. The process is simple, but it does not have the advantage that it is not easy to accumulate pollution. In fact, the pollution of ceramic insulator on site is also very serious. Compared with ceramic insulator, the greatest advantage of glass insulator is that it does not need zero value detection, and zero value glass insulator will self explode
Glass insulator: it has good mechanical and electrical properties, and its tensile strength, electrical breakdown resistance, vibration fatigue resistance, arc burn resistance and cold and hot shock resistance are better than porcelain insulator. Different from porcelain insulators, glass insulators have the insulation self elimination ability of zero value self explosion, which is easy to be found without insulation test. The self explosion rate is usually higher in the first three years, which is opposite to that of porcelain insulators. Decades of operation and test data show that tempered glass insulators have long-term stable electromechanical properties and long service life.
Ceramic insulator: it has the advantages of good insulation performance, climate change resistance, heat resistance and flexible assembly. It is widely used in lines of various voltage levels. Disc porcelain insulator belongs to the breakdown type. It is composed of porcelain and metal parts with different physical and chemical properties bonded by cement. It will gradually deteriorate and pose a threat to the safe operation of the power grid after long-term exposure to electric field, mechanical load and natural sunshine, wind, rain, snow and fog. In particular, in case of flashover of insulator string containing deteriorated insulator (due to lightning strike or pollution flashover, etc.), the head of deteriorated insulator may be heated and exploded instantly, resulting in the accident of conductor landing. The advantages and disadvantages of glass insulator and porcelain insulator can be compared. Glass insulator and porcelain insulator can be used according to the line design.
