Porcelain and glass insulators superior anti-aging properties of composite insulators, the aging rate generally require ten thousandth or less reliability than the composite insulators; general requirements insulators on the line of life of more than three decades. Good quality insulators can meet this requirement. Composite insulators on the line of life also need to collect data.

    Superior stain resistance of composite insulators porcelain insulators and glass insulators, do not need cleaning every year, reduce labor intensity; composite insulators weight lighter than porcelain and glass insulators; and composite insulators no zero value problem.

    And glass insulators compared to detect the presence of a zero value problem porcelain insulators. Zero value is detected and still is a problem. Current methods work great. Blew glass insulators should be viewed from two aspects, low blew rate is advantageous, because from a distance, without the tower can be found.