Overhead power lines mainly refer to overhead electrical wires, erected on the ground, and are transmission lines that use insulators to fix transmission wires on poles standing upright on the ground to transmit electrical energy. What type of wire is used for overhead? The wires used in low-voltage overhead lines are divided into bare wires and insulated wires. According to the structure … Read more
1.What are the types of cable? The wire products used to transmit electric (magnetic) energy, information and realize the conversion of electromagnetic energy are collectively referred to as wires and cables. According to different purposes, wires and cables can be divided into five categories: (1). Bare conductors: products with only conductors without insulation, such as … Read more
In the China wire and cable products, there is no very small structure with a concentric cable. Some developed countries abroad are committed to research in this area and put it into practice. In the British Standard, BS4553-92 copper core PE insulated cable for power supply, the same core layer can be used as The … Read more
With the acceptance of prefabricated branch cables by the majority of users, a variety of prefabricated branch cables have entered the market under the situation of rapid increase in usage. This situation has brought a certain degree of selection to building electrical designers. difficult. The choice of stranded type, also called twisted type, branch cable … Read more
The advent of power cables has greatly improved the safety of power generation, transmission, transformation, supply, distribution, and use of electricity. Single-core power cables appeared first. As there are more and more occasions for three-phase four-wire power supply, three-phase five-wire power supply and multi-loop power supply in actual use, the requirements for occupied space and … Read more
The broken core fault point has the following methods to detect: 1.1. Induction method It can be used with induction pen and digital multimeter; suitable for cables without metal armor and steel tape shielding; attention should be paid to prevent electric shock, the test place and the terminal connection when the equipment is rewinded. specific … Read more
In 1988, a transoceanic submarine optical cable (TAT-8) system was installed between the United States, Britain and France, with a total length of 6,700 kilometers.This optical cable contains 3 pairs of optical fibers, each pair has a transmission rate of 280Mb/s, and the relay station distance is 67 kilometers. This is the first communication submarine … Read more
According to incomplete statistics, there have been more than 100 major accidents caused by cable fires spreading across the country in the past ten years, and more than 320,000 meters of cables have been burned. The restoration and reconstruction work is expensive and time-consuming, and the loss of power supply alone amounts to more than … Read more
Many users and installations are faced with the problem of cheap and efficient data transmission between buildings in the park environment. The choice of routing, transmission distance and application environment will all affect the choice of cable medium. Incorrect or inappropriate choice will result in a shortened period of wiring investment, and reinstallation will also … Read more
In recent years, silane cross-linked polyethylene cable material (hereinafter referred to as XLPE) has become the leading material for low-voltage cross-linked (xlpe) insulated cable insulation because of its simple manufacturing equipment, mature technology, convenient operation, and low overall cost. At present, the commonly used XLPE is the two-step XLPE. When the cable factory produces the … Read more