Porcelain Insulator for Distribution Transformer/Ceramic Insulator/Post Composite Insulator

The group is deeply involved in the 69kV Composite Deadend Insulators, HDPE Insulators, insulator line post industry chain, continuously developing and upgrading its brand. Adopting group operation and management, it has formed three core businesses: international trade, deep processing of agricultural products, and modern supply chain services. Communication is the premise and foundation for the enterprise to reach a unified will and unity, and it is an effective way to resolve conflicts and differences. We offer a wide range of payment options to make transactions seamless. We believe that science and technology can enrich and strengthen a country, while humanities can build and revitalize a country. Our company adheres to the enterprise spirit of unity, integrity, truth-seeking and innovation, through the development process of seeking survival with quality, creating development with science and technology, building integrity with service and seeking benefits from management.

Improvements in electrode shape

The average breakdown field strength of uniform electric field and slightly inhomogeneous electric field gap is much higher than that of extremely inhomogeneous electric field gap. Generally speaking, the more uniform the electric field distribution, the higher the average breakdown field strength. Therefore, the electrode shape can be improved and the electrode curvature radius can be increased to improve the electric field distribution and increase the breakdown voltage of the gap. At the same time, the electrode surface should try to avoid burrs, edges, etc. to eliminate the phenomenon of local enhancement of the electric field. If an extremely non-uniform electric field is unavoidable, a symmetrical electric field (rod-rod type) should be used whenever possible.

Even if the electric field is extremely uneven, in many cases, in order to avoid strong corona discharge under the operating voltage, the electrode curvature radius must be increased.

Figure 2-25 shows some methods of changing the shape of the electrode to adjust the electric field. These methods can be summarized as follows: 

(1) Increase the radius of curvature of the electrode: For example, add a spherical shield to the end of the transformer bushing (see Figure 2-25(a)), use expanded diameter wires (the cross-section is the same, the radius is increased, see figure 2-25(b)), etc., use the method of increasing the electrode curvature radius to reduce the surface field strength.

(2) Improve the electrode edge: The electrode edge should be made into an arc, or try to make it as close as possible to an equipotential surface (see Figure 2-25(c)) to eliminate the edge effect.

(3) Make the electrode have the best shape; such as adding a metal flat ball to the high-voltage lead through the wall, and the edge of the wall hole is made into a rotating body similar to a vertical chain line (see Figure 2-25(d)), so as to improve its electric field distribution.

Adjusting the electric field and reducing the local excessively high field strength are effective measures to improve the electric strength not only for the gas gap but also for other insulation structures. For different insulation structures, in addition to improving the electrode shape, other methods of adjusting the electric field can also be used.

solid insulating covering

In a slightly uneven electric field, covering the surface of the high-field-strength electrode with a solid paper insulating layer can also increase the gap breakdown voltage, and the covering layer has a significant effect on increasing the air gap breakdown voltage, but covering the counter electrode with an insulating layer , to improve the air gap breakdown voltage research needs to be further in-depth.

Insulator designed mainly for flexural loads (bending) but also tension and compression, thus having combined loading capability. Normally utilized as a single unit can also be a double insulator assembly. Composite materials are most suitable for the application on compact lines and retrofitting due to their flexibility, overloads absorption capacity and reduced weight. We have thousands of pieces line post from 33kV to 362kV worked on lines all over the world, and there is no single accidents happens. 

We have our own silicone rubber workshop and lab. Each batch of rubber shall be tested and we have our own formula which makes our insulator tracking and earsion performance stable and good. Below is the key parameter of our rubber. 

Our company with strong strength, reasonable price, good service and a number of enterprises to establish a long-term partnership. With high quality products and perfect after-sales service, we have won the consistent reputation of customers all over the country. We sincerely welcome customers from home and abroad to visit, investigate and discuss business cooperation.

Our company has a quality assurance system have been established for Porcelain Insulator for Distribution Transformer/Ceramic Insulator/Post Composite Insulator. We keep the path of green development and promote the company's product transformation and upgrading. It is important to always consider what role we can play in the customer's business, and apply the concept of 'thinking from the customer's point of view' to commodity development, service provision and business activities, rather than simply starting from selling products and services.

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