The basic performance of plug accessories can be divided into three categories: mechanical performance, electrical performance, and environmental performance. Another important mechanical performance of plug accessories is the mechanical life of plug-type accessories. The mechanical life of plug accessories is a durability index, which is called mechanical operation by national standards. Plug-type accessories use one plug-in one-unplug cycle, and the judgment is based on whether the plug-type accessories can normally complete their connection function after the specified plug-in cycle. Next, let's take a look at the basic performance of plug-type accessories.

Post insulators are generally used as insulators for overhead power lines in villages and towns, and can play an important role in overhead transmission lines. Composite post insulators can effectively use narrow corridors for open-voltage power transmission, are suitable for urban network technical transformation, can reduce the height of poles and towers, and can save a lot of manpower, material and financial resources. Composite post insulators play two basic roles in overhead transmission lines, namely supporting wires and preventing current from returning to the ground. These two functions must be ensured. Composite post insulators should not be caused by changes in the environment and electrical load conditions. Otherwise, the composite post insulator will not have a significant effect and will damage the use and operating life of the entire line.

Insulators should have sufficient insulation strength and mechanical strength. They should not only withstand the effects of working voltage and overvoltage during operation, but also have sufficient resistance to the erosion of chemical impurities, and can adapt to changes in temperature and the influence of the surrounding environment. Composite pin insulators have high bending resistance, impact resistance, shock resistance and superior explosion-proof performance. Besides, composite pin insulators have reliable internal insulation and light weight, making them an ideal replacement product for traditional toughened glass insulators.

In the past, the main options for support insulators at air-insulated HVAC substations were either solid core porcelain or composite insulators up to 245 kV. In addition, RTV coatings have at times been applied to solid core porcelain post insulators to improve their pollution performance.

Test stations have been acknowledged as an important tool for evaluating insulator performance under different service environments. Typically, these stations are sited in areas having severe pollution problems and therefore allow accelerated accumulation of contamination.

Drop-out fuse is the most commonly used short-circuit protection switch for branch lines and distribution transformers of 10kV distribution lines. It has the characteristics of the economy, convenient operation, and strong adaptability to the outdoor environment. Drop-out fuse is widely used in 10kV distribution lines and distribution. The primary side of the transformer is used for protection and equipment switching and switching operations. Next, I will introduce to you the working principle, function, and use environment of the drop-out fuse. Here are some answers.