Detailed Description
Insulators are assembled using porcelain components and upper and lower metal attachments, bonded with adhesive. Elastic pads are placed between the porcelain component and metal attachment at the bonding contact areas. The bonding areas of the porcelain components feature structures such as sandblasting, knurling, and grooving to ensure mechanical strength and prevent loosening or twisting. The porcelain surface is evenly glazed with white enamel, while the metal attachments are coated with gray magnetic paint.
The insulator porcelain body structure features two types: a cavity partition structure (penetrable) and a solid (non-penetrable) structure. The composite insulated支柱insulators are generally of the solid non-penetrable structure. This latter structure enhances safety and reliability compared to the former, and reduces maintenance and testing workload.
The insulator porcelain pieces come in two shapes: with multiple or fewer棱. The multi-棱 shape increases the surface distance, offering better electrical performance than the fewer-棱 shape. All products except for the gradually being phased out exterior-insulated pin insulators are of the multi-棱 design.
Internal rubber assembly structure, due to metal accessories being glued into the holes of ceramic parts, it correspondingly increases the insulation distance, enhancing electrical performance, and also reduces the space occupied during installation. However, since internal rubber assembly is不利于 improving mechanical strength, insulators with high mechanical strength requirements are best suited for combined assembly (i.e., upper accessories use internal rubber assembly, and lower accessories use external rubber assembly).
The disk-shaped suspension porcelain insulator for high-voltage overhead transmission and distribution lines is used for insulation and wire fixation. Generally, it is assembled into insulator strings for use on lines of various voltage levels.
Standard insulators are suitable for general areas; increasing the number of insulator pieces can also enhance the anti-fogging performance if appropriate.
Suspended porcelain insulators are assembled with porcelain components, iron caps, and steel feet, bonded using not less than No. 525 silicate cement and quartz sand as an adhesive. The iron caps and steel feet have a thin coating of a buffer layer in contact with the adhesive surface, and the top of the steel foot features an elastic pad. The porcelain surface is typically glazed in white or brown, but other glazes can be applied as needed. Both the iron caps and steel feet are fully hot-dip galvanized. The ball-type push-pull elastic locking pins come in W and R types, both made of tin bronze, brass, and austenitic stainless steel, offering good elasticity and corrosion resistance, and are easy to install and disassemble. The cylindrical and saddle-shaped opening pins for groove connections, the former with a hot-dip galvanized surface, and the latter made of brass. The above elastic locking pins and cylindrical pins, etc., as non-insulating parts, are divided into ball-type and groove-type according to the connection method.
Insulators of the same strength grade, both standard and anti-fouling types, utilize identical ball socket connection dimensions for interchangeable compatibility.
