How much do you know about polymer insulators?

The polymer insulator is a kind of insulator that does not use porcelain as the insulating medium at all. For users, the main advantages of this type of suspension and horizontal rod insulators are high mechanical strength, light weight, and excellent performance in high-contaminated areas and under large mechanical shock stress. It plays an important role in the construction of ultra-high voltage lines. However, seldom people know much about polymer insulators. In order to assist you have a better understanding of polymer insulators, I’d like to expand on polymer insulators in detail.

Here is the list of the article:

• What are the characteristics of polymer insulators?

• What is the composition structure of polymer insulators?

• How to classify polymer insulators?

What are the characteristics of polymer insulators?

(1) Good mechanical properties. The mechanical strength per unit weight of polymer insulators exceeds 10 times that of porcelain insulators.

(2) Good electrical performance. The dielectric constant of the polymer insulator is 4.5, the electrolyte breakdown strength is 18 kV/mm, and the pollution and arc resistance of the polymer insulator is also very good.

(3) Light weight. Ordinary porcelain insulators are about 55 kilograms per meter in length, while polymer rod insulators are only 5.4 kilograms per meter in length, which is only one-tenth of that of porcelain insulators.

(4) Small interference to the radio. Polymer rod insulators have few metal parts and have little effect on radio interference.

(5) Convenient pouring. Polymer insulators can be cast into shapes that are not easy for porcelain insulators.

(6) Simplify the tower structure. Due to the high mechanical strength and light weight of polymer insulators, some UHV line poles and towers do not need cross arms, but the suspension cable structure is formed by polymer rod insulators.

What is the composition structure of polymer insulators?

The polymer insulator is mainly composed of three parts: a rod core, an umbrella skirt and an end metal connector.

The rod core is used to bear mechanical load, the umbrella skirt determines the electrical performance of the polymer insulator, and the metal connector transmits the mechanical load. The materials used to make polymeric insulator umbrella skirts are usually alicyclic hydrocarbon epoxy resin, silicone rubber, ethylene propylene rubber, and tetrafluoroethylene rubber.

How to classify polymer insulators?

According to different uses, polymer insulators can be divided into line insulators used in power transmission lines, substation insulators used in substations, electrical insulators used as insulation components of electrical equipment, and wire insulators used to transmit electrical energy from generators to step-up transformers, electrical insulators in contact with the power grid in railway operation, and insulators in contact with the grid in urban traffic.

With the development of science and technology, we have developed polymer insulators with better performance and wider application range. Polymer insulators are playing an increasingly important role in the construction of power grids. If you want to purchase polymer insulators, welcome to our company to buy, we will provide you with high-quality products and satisfactory services.