How to check the performance of cable accessories
The connection methods of cable accessories are divided intoterminal connection; andcenter connection;. The terminal connection is divided into indoor terminals and outdoor terminals. Generally, outdoor terminals refer to outdoor cable joints, and indoor terminals refer to indoor connection cables and electrical equipment. connector. The center connection is divided into two types: straight-through and insulated.
Cable accessories provide an important guarantee for the seamless and safe connection of the middle and terminal of various cables in the cable line. Therefore, the safe and stable protection of power transmission is an important basis for the quality of cable accessories.
The basic requirements of cold-shrinkable cable accessories: effective control of the electric field strength at the fracture of the insulation shield, reliable sealing to the external environment and complete insulation protection, satisfactory mechanical strength, and excellent conductor connection.
How to measure the function of a good cable accessory?
There are several elements to measure the function of cable accessories, the most important is to measure whether a cable accessory can achieve a long-term stable operating life in terms ofelectrical function; andphysical function;, as well as some common cable accessories after a long period of operation. The key elements of the cable accessories have an important impact on the function of the cable accessories.
Electrical function.
The performance of partial discharge resistance, the role of electrical stress control measures, the structure of the shielding layer of the cable center head, and the weathering function of the cable terminal. The role of electric stress control measures for cable accessories can be measured by whether they can effectively reduce the electric field strength of the internal and external surfaces, whether they can contribute to the advancement of other electrical functions, and whether they can be demonstrated through long-term operating moments
Physical function aspects.
The waterproof sealing function, the mechanical maintenance function of the center head and the reliability of the grounding connection, heat-shrinkable cable accessories operation clarification and installation process.
A good quality cable accessory should have the following characteristics:
1. It has certain mechanical strength, vibration resistance and corrosion resistance.
2. After long-term operation, the contact resistance is not greater than 1.2 times the resistance of the same length of the cable core body.
3. The wire core is well connected, the connection resistance is small and stable, and it can experience the impact of fault current.
4. The manufacturer's quality assurance system: When the prefabricated cable accessories leave the factory, the manufacturer provides rubber prefabricated parts, prefabricated stress cones, porcelain sleeves, shells, impregnants and other components, which are assembled into integral terminals or components during on-site installation. Therefore, the manufacturing quality and installation process of each component are directly related to the final quality of the product.
Suzhou Jiuwei Electric Made Co., Ltd. is located in Fenhu National High-tech Zone, Suzhou City, Jiangsu Province. Since its establishment in 2010, it has been based on lean and innovation, focusing on the in-depth exploration of the core technology of the industry, with the latest scientific research technology, manufacturing rich Effective products to face existing and potential markets. The company's products include: power equipment, cable accessories, insulation products, power fittings and other more than ten kinds of products.
Jiuwei cable accessories control the quality from the source, and strictly select the raw materials of the products. The company has advanced production equipment and a professional technical team. The company has passed the ISO9001-2015 quality system certification, and has obtained more than 30 patent certificates. The whole series of products have won the national The certificate of conformity issued by the authoritative testing agency, and won the honorary title of national high-tech enterprise, each batch of products meets the technical standards, and can provide you with CE and SGS certification reports, and the products are underwritten by PICC.
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