Jiujiang: yvfr cable 3x25+1x16 came to the factory for inspection
the company produces 35kV and below power cables, control cables, computer cables, silicone rubber cables, high-temperature cables in the field of new energy vehicles and passenger cars, flame-retardant cables, fire-resistant cables, overhead insulated wires, communication cables, marine cables, cables for nuclear power stations, and cloth wires, and features the production of all kinds of automotive cables, cables for new energy vehicles, rail transit cables Halogen free, low smoke, flame retardant and environment-friendly cables, spring-shaped automotive cables, etc
Jiujiang: yvfr cable 3x25+1x16 came to the factory for inspection. Pull the core wire according to the stripping direction to see if the core wire and insulating layer are bonded with process materials; Good cable has large adhesion force, 5 Longitudinal tensile test: take a meter of cable, peel off the core wire, insulation layer, shielding layer and outer sleeve in layers, and leave 10 cm long each. The method is: hold the adjacent two layers of the cable with two hands respectively and pull it in the opposite direction; Generally, good cables cannot be pulled by force, and poor cables can be easily pulled out without great effort - elevator cables are very important, and many so-called "elevator special cables" have this problem. Lower ambient temperature: constant laying -40 ℃, non constant laying -15 ℃, cable shall be allowed * small bending radius: metal tape wrapped shielding or steel wire, steel tape armored cable shall not be less than 12 times the outer diameter of the cable, and non armored flexible cable or braided shielding cable shall not be less than 6 times the outer diameter of the cable. K-type B-type low-density polyethylene with antioxidant function is selected as the insulation of cable ground wire core. Polyethylene has high insulation resistance. When calculating the relative cost of copper and aluminum conductors, we need to consider factors such as price, proportion and conductivity, so as to get the true answer whether using aluminum conductors saves costs. Copper is more troublesome than the process between them, and this is the process of users, who have to pay a certain amount of money to open and eliminate aluminum weight. The specific gravity of copper is * * * 3, and the specific gravity of aluminum is 2.7g/cm3, that is, when the conductor specifications are the same, the weight of copper conductor is 3 times that of aluminum conductor 3 times. However, the conductivity of aluminum is only 61% of that of copper, that is, under the same transmission current, the cross section of aluminum conductor is 61% larger than that of copper conductor. Therefore, in terms of conductor weight, to make the two conductors have the same current carrying capacity, the weight of copper conductor is about twice that of aluminum conductor. In addition, the price ratio of copper to aluminum is about 3.5, so the cost of equivalent copper conductor is 7 times that of aluminum conductor. Of course, the simple cost comparison mentioned above cannot explain all the problems. Because cable products are limited by standard conductor specifications. It is impossible to buy aluminum core cables with conductivity exactly equal to that of copper core cables
Jiujiang: yvfr cable 3x25+1x16 will lose its cost advantage when it comes to the factory for inspection. Now, the cost of most copper core low-voltage cables and many medium voltage cable conductors has exceeded 50%, so compared with copper core power cables, the cost saving advantage of aluminum core power cables is quite obvious. High voltage cable is a kind of power cable, which refers to the power cable used for transmission 1, i.e. crack transformation and crack growth between 0kv-35kv (1kv=1000v), and is mostly used in the trunk road of power transmission. The main types of high-voltage cables are YJV cable, VV cable, yjlv cable and VLV cable. The full name of YJV cable is XLPE insulated PVC sheathed power cable (the full name of copper core VV cable is PVC insulated PVC sheathed power cable (the full name of copper core yjlv cable is XLPE insulated PVC sheathed aluminum core power cable. The full name of VLV cable is PVC insulated PVC sheathed aluminum core power cable. Due to the excellent conductivity of copper conductor, more and more projects use copper core power cable as the main road of power supply system.
Jiujiang: yvfr cable 3x25+1x16 comes to the factory for inspection, which is an important guarantee and means to ensure product quality and improve enterprise economic benefits. Wire Cable manufacturing involves a wide range of processes, from smelting and pressure processing of non-ferrous metals to chemical technologies such as plastics, rubber and paint; Textile technology such as wrapping and weaving of fiber materials, wrapping of metal materials, longitudinal wrapping of metal strips, metal forming and processing technology of welding, etc. All kinds of materials used in the manufacture of wires and cables are not only of many types, varieties and specifications, but also in large quantities. Therefore, the consumption, standby consumption, batch cycle and batch of various materials must be verified. At the same time, the decomposition, recycling, reuse and waste disposal of waste products, as an important part of management, do a good job in material quota management and pay attention to saving. In the production of wires and cables, from the import and export and storage of raw materials and various auxiliary materials, the circulation of semi-finished products in various processes to the storage and delivery of products, the material flow is large, so it must be reasonably arranged and dynamically managed. Wire and cable manufacturing uses special production equipment with the process characteristics of the industry