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When​‍​‌‍​‍‌ buying the bushing cover, first of all the main thing is to determine size compatibility, insulation capability, environmental suitability and ease of installation, then to make judgment and selection of the right type mainly based on technical data and sample tests instead of price ​‍​‌‍​‍‌only.

Consequently,​‍​‌‍​‍‌ different electrical devices may call for various kinds of bushing shrouds due to the fact that actual structural differences between the following actual factors: bushing size, terminal structure, wire direction, and installation space may be a reason. Moreover, these characteristics are a determining factor as to whether the sheath could be properly installed and protected, and not just by referring to the name or appearance of the ​‍​‌‍​‍‌equipment.

The​‍​‌‍​‍‌ customer is now allowed to choose an insulated bushing cover mainly on the basis of the real equipment dimension for example the main body outer diameter, umbrella skirt diameter, protective length, and terminal structure instead of only referring to the voltage class or the ​‍​‌‍​‍‌model.

The polyolefin bushing guard is more suitable for projects with multiple specifications, non-standard size and focus on mechanical protection capabilities, while the transformer bushing cap is more suitable for projects with uniform specifications, long-term outdoor operation, and high requirements for flexibility and weather resistance.

This paper mainly analyzes the common external contact risks of overhead lines, and how the overhead conductor cover provides supplementary protection for key lines such as tree-dense areas, residential areas, and areas with frequent bird activity through local insulation coverage.

This paper introduces how to select the appropriate cable protection sleeve for overhead wires according to line environment, conductor specifications, voltage levels and outdoor operating conditions, and analyzes the application value of polyolefin overhead line cover in insulation, ultraviolet aging protection, mechanical properties and long-term line protection.