Wuhan telephone cable steel wire armored communication cable 80 * 2 * 0.8

Description :

　　The electrical technical indicators of communication cables are numerous and high. General metal cables have requirements such as wire resistance, insulation resistance, working capacitance, insulation strength, and capacitance imbalance. For long-distance and coaxial cables, in addition to the above requirements, there are also requirements for end impedance, impedance non-uniformity, attenuation constant, crosstalk, etc.

　　Characteristics of using mining cables:

　　1. The rated voltage U0/U of the power frequency is 380/660V, 660/1140V, 1.9/3.3kv, 3.6/6kv, 6/10KV, 8.7/10KV, 300/500V;

　　2. The high allowable working temperature for cable conductors is 65 ℃ and 90 ℃;

　　3. The cable allows a low working environment temperature of -35 ℃;

　　4. Cable bending radius: not greater than 6 times the outer diameter of the cable.

　　Mining cable control core:

　　1. Increase the flexibility of coal mining machine cables used in coal mines;

　　2. Increase the relative slippage of the control wire core;

　　3. Increase the strength of cable conductors for coal mining machines used in coal mines;

　　4. Changing the conductor from the original bundle twisting structure to regular twisting can increase its bending performance, and then weaving steel wires outside the conductor to increase its strength;

　　5. The control wire core can be woven with a mixture of tinned copper wire and steel wire, which is also a good method.

　　Selection of Mining Cables:

　　In the mine power supply system, high-voltage power supply lines generally use armored cables, which have a much lower failure rate compared to low-voltage power supply. The power supply in mining areas is a weak link in the power supply system, and the working environment is poor. Therefore, how to choose the type and cross-section of cables is related to the safety of power supply operation. The following introduces the selection of cables and the method of selecting cable cross-sections.

　　Development status of mining cables:

　　1. In recent years, there has been a lack of emphasis on adjusting the product structure in the wire and cable industry due to low-level repetitive construction. The contradictions in product structure are still prominent, and high-level products cannot meet the needs. For example, in terms of categories, China's bare wire production accounts for nearly 1/5, while developed countries only account for 1/10. In bare power lines, overhead lines and ordinary steel cored aluminum stranded wires account for the vast majority;

　　2. There are over 700 loss making enterprises in the industry with low economic benefits, accounting for more than a quarter of the total losses. The industry's sales revenue profit and tax rate was 11.7% in 1991 and decreased to 5% in 1995. Due to the continuous decline in profitability, an increase in loss making enterprises, and a general shortage of funds within the industry, the average asset liability ratio is as high as 70%;

　　3. The scale growth is too rapid, and the overall capacity of the wire and cable industry is more than twice the demand. The predicted demand for various product categories in 2000 is less than the production capacity.

　　Tianjin Cable Factory Branch, with a pragmatic work style and an ideal belief in innovative development, has stood firm in the tide of the business world, growing from scratch, from small to large, step by step, and thriving in the baptism and tempering of the market wind and rain.

AfterSalesService :

• Mining communication line