With the renovation and construction of urban and rural power grids, the demand for high-voltage cable systems in China has surged. The product is rapidly expanding in the market, and many types of high-voltage accessory production and sales enterprises have emerged in China, with sales capabilities several times higher than market demand. Many enterprises are satisfied with individual sales and ignore product installation, which will lead to repeated product failures; Most enterprises are severely lacking in technical personnel, research equipment, and capital investment, lacking the basic conditions for competition; A considerable number of cities adopt high-voltage cable systems, and mastering the selection principles as soon as possible is an important factor related to system safety and stability. Therefore, when users choose high-voltage cross-linked cable accessories, the correct selection not only affects the construction and investment of cable engineering, but also directly affects the safe operation and service life of the cable system. Therefore, reliability is the fundamental principle of high-voltage cable accessory selection.
Users who are new to the field of ultra-high voltage cable accessories are prone to falling into the misconception of pursuing novelty when selecting products, believing that newly developed products are definitely better than old ones, but in fact, this is not the case. Each structure has a series of advantages, but there are also some weaknesses. Moreover, a certain characteristic of a structure may be an advantage in one usage scenario and an undesirable disadvantage in another usage scenario.
The correct choice should be determined based on actual usage conditions, such as in densely populated and equipment intensive areas of big cities, where the explosion-proof performance of silicone rubber composite sleeves has become increasingly important; On the contrary, in some areas with harsh climate conditions, choosing porcelain sleeves may be more appropriate because the probability of terminal explosions is very low.
Domestic high-voltage cross-linked cable accessories, due to their reliable performance and mature products, still have this type of accessory for use and a very small number of purchases in China. With the development of polymer materials and manufacturing technology, high-voltage cross-linked cable accessories have developed rapidly during the Ninth Five Year Plan period. By 2000, the production of domestically produced 110KV cross-linked cable accessories exceeded that of imported cable accessories. Therefore, the localization of high-voltage cable systems has become a reality (domestically produced high-voltage cables have surpassed imported cables five years ago).