Welcome to the ZMS CABLE information blog, here is the cable industry knowledge sharing and technology popularization of the professional world. In this section, we focus on cable technology, product applications, and industry knowledge, carefully crafting a series of easy-to-understand and practical content, to provide readers with authoritative technical support and comprehensive industry interpretation.
Removing metal stains prior to cable connection is an important prerequisite for ensuring cable lug quality.
A shielded cable is a transmission line that uses a metal mesh braid to encase the signal line. The braiding layer is usually red copper or tinned copper. The wire and cable industry is the second-largest industry in China, after the automobile industry. The product variety satisfaction rate and domestic market share are over 90%. In the world, China’s total wire and cable output value has surpassed that of the United States, becoming the world’s largest wire and cable producer. Along with the rapid development of China’s wire and cable industry, the number of new enterprises has been rising, and the overall technical level of the industry has been significantly improved.
Environmentally friendly cables are those that do not produce toxic and harmful substances before, during, and after use. For example, it does not contain heavy metals such as lead, cadmium, hexavalent chromium, and mercury, and does not contain brominated flame retardants. The environmental performance test by SGS recognized testing agency, in line with the EU environmental protection directive and higher than its index requirements. No harmful halogen gas, no corrosive gas, less fever when burning, no soil pollution of wire and cable.
Cross-linked polyethylene(XLPE) insulated power cables are a common category of cables used in civil engineering, including normal, flame retardant, fire-resistant, and halogen-free low smoke flame retardant. Cross-linked polyethylene insulated power cables are resistant to environmental stress. It also has the characteristics of high mechanical strength, chemical resistance, excellent electrical performance, simple structure, lightweight, and easy to use.
Fuses can be divided into high-voltage fuses and low-voltage fuses according to the voltage used. According to the protection object can be divided into fuses for protecting transformers and general electrical equipment, fuses for protecting voltage transformers, fuses for protecting power capacitors, fuses for protecting semiconductor components, fuses for protecting electric motors, and fuses for protecting household appliances, etc. The structure can be divided into open type, semi-enclosed type, tube type, and spray type fuse.
The flame-retardant nature of the cable in the case of multiple dense configurations should be by the “burning test method for bundled wires and cables”. As well as the cable configuration, the need to prevent catastrophic accidents and economic and reasonable principles, to meet the requirements of the appropriate category.
Among the electrical insulators used in overhead lines, porcelain insulators still occupy 1/3 share. It often appears in the operation of the defective fault including zero value, broken string, rust, etc. Once the above problems occur will seriously affect the line safety, today to talk about the causes of the above problems and countermeasures.
First, explain the significance of fiber optic communication: fiber optic communication is one of the most meaningful inventions since World War II, without fiber-optic communication, there would not be today’s communication network.
The composition of PVC cable material is: PVC as the base resin, add stabilizer, lubricant, inorganic filler, etc., after mixing and kneading extrusion and preparation of the particles. PVC cable material is still one of the most used cable materials.
When using PVC cable material, porosity, surface roughness, and brittleness may occur. We discuss in detail the causes of these phenomena:
Optical fiber is a light transmission tool that uses the principle of total reflection of light in fibers made of glass or plastic to reach. Compared with copper cables, optical fibers are very fragile and easily damaged, especially during the construction of optical fibers. Today, this article will talk about the seven problems that must be paid attention to during the construction of optical fiber cables.