Uhv prop insulators mainly include isolation switch prop, reactor prop, busbar prop, converter station prop and other electrical prop. This kind of insulator has the same characteristics, that is, the external size is large, the inner insulation mandrel diameter can be up to Ø315 mm, the combined height can be up to 12 m.
Uhv composite post insulators are mainly composed of metal end accessories, silicone rubber umbrella skirt and inner insulating mandrils.
The end metal accessories mainly play the role of connecting with external components; Silicone rubber umbrella skirt mainly plays the role of increasing the creepage distance and protecting the inner insulation mandrel. The inner insulation mandrel is the internal insulation and main load-bearing component, which plays the role of bearing and supporting electrical equipment and is the core part of the whole composite pillar insulator.
From the perspectives of raw materials, structure and manufacturing process, the internal insulation mandrels of UHV composite pillar insulators can be classified into the following types:
The main raw materials are: inorganic ceramic materials, organic polymer composite materials;
From different structure and manufacturing process, it can be divided into: extruded rod core outer winding forming inner insulation mandrel, integral extruded forming inner insulation mandrel, perfusion forming inner insulation mandrel, extruded rod cluster casting forming inner insulation mandrel, porcelain material forming inner insulation mandrel, low density insulating medium filled composite material forming inner insulation mandrel.
