The composite long rod insulator is used as electrical insulation for suspension or tension overhead lines with high mechanical strength in medium pollution regions and above at ambient temperature -40 degree Celsius ~+ 50 degree Celsius.

Electro-mechanical characteristics of insulators meet all requirements specified in National Standard GB/T 19519-2004"Composite insulators for A. C. Overhead lines with" nominal voltage greater than 1000V Definitions, Test methods and Acceptance Criteria" and "Composite insulators for A. C. Overhead Lines with Nominal Voltage Greater than 1000V ".