ACSR cable FAQ analysis

With the development of the cable manufacturing process, ACSR cable technology continues to mature. ACSR cable's high strength, and good electrical conductivity, are widely used in China at this stage, and it has been generally well received by the industry. ACSR cable often occurs in the course of surface oil, scratches or scratches, loose and black and so, now conducting an analysis, we will further explore how to control the quality of ACSR cable.

ACSR FAQ

1. Wire surface oil

In everyday use ACSR conductors often encounter the phenomenon of surfaces covered with oil, giving users a lot of trouble, and affecting the results. The main reason is oil and grease low-temperature wire surface, plus the larger of its own viscosity, non-volatile at room temperature, so they remain in the surface of the wire; and, at the wire surface oil removal before construction work in place also It led to the grease residue. In addition to these two relatively large impacts outside the rub line at the exit of blankets in the finished mold is too dirty, twisted twister preparation process residues and other oil itself is a major cause of this phenomenon. 

Therefore, in the production process ACSR oil on the surface should be controlled, to grease removal when brushed clean, and regulate the temperature of the lubricating oil, so that it can promptly be volatilized in the production process; at the same time, it also to ensure the finished product wipe clean lines at the die exit blankets, to ensure the production of strands twisted body clean and free of dirt, to further reduce the occurrence of surface oil ACSR cable.

2. Wire surface scratches or scratch

One of the major ACSR cable corona phenomena in the course of the wire surface is scratching, while corona is one of the biggest causes of power loss, so effective control wire surface scratches can reduce energy wear and tear.

Wire surface scratches caused many, including aluminum rod drawing, die damp cause deformation of the process of drawing lubricant can not fully enter the work area, resulting in the work area of the aluminum scrap resulting stranded wire surface scratches. Another more important reason is drawing oil quality standards. 

From the lubrication area into the working area of the drawing oil due to a prolonged high-temperature state, if it fails to reach the standards, too much water, will seriously affect the lubricating effect, leading to wire breakage surface scratches, and other phenomena in the drawing process. Therefore, in order to further enhance the wire quality and reduce lead surface scratches, further saving energy, we should strictly control the production process wire, surface scratches appear fundamentally eliminated. 

Pole should first be placed in a dry place, in order to effectively solve the drawing die hole workspace aluminum scrap retention problem; ensure a smooth entry into the work area of the lubricating oil to ensure that the wire roundness and smooth. At the same time, drawing oil should be strictly controlled by quality standards in order to ensure the smooth progress of the wire drawing work to improve the production quality of the wire.

An important reason for the wire surface scratch if subjected to sharp metal objects in the drawing process, will lead to its non-round, not smooth, which is the main cause of the low quality of the wire in addition to the outer surface scratches causing corona phenomenon One. Wire scratch the surface effect is more severe than scratches, therefore, in the production process required by ground maintenance, ground maintenance strictly controls the production equipment performance, and constantly improves the production process, in order to control the underlying wire to ensure quality purposes.

3. Loose wires

Loose lead wire is a relatively common quality accident, in our daily work we often referred to it as "lantern flower." Lantern flower generation in addition to reason and put the line equipment and technology, the most important is due to the loss of the twisted wire. This phenomenon can result in serious or even scrapping the whole wire, causing serious damage. Therefore, in our daily work, we should try to avoid lantern flower production.

Avoiding lantern flowers usually produces not only work experience but also needs good equipment as a supplement. In the production process, the wire tension should be controlled suitably, not too small should not be too large. When dying, should be a strictly controlled pore size, under normal circumstances it should be smaller than the outer diameter of the small strands 0.3-0.5mm. 

Die too large or too small will seriously affect the quality of the wire, resulting in the emergence of flower lanterns. In the stranding process, should be reasonable control of the number of stops, parking at uneven speed will result in different wire stranding pitches, and then the wires lose. Rationalizing back-twist means to eliminate the internal stress generated in the wire processing, strict quality control of the steel core is the main method to prevent loose wires, so to give them enough attention. In daily production and life, we should many, many angles of scientific and rational control wire loose phenomenon, in order to ensure proper use of wire.

4. Blackening

In hot, humid environments, ACSR cables often appear blackened phenomenon, which is mainly due to the chemical elements constituting the ACSR - Aluminum surface in the external environment being easily oxidized to produce the dense oxide, the physical properties of these aluminum compounds are black. Thus, we see the black wire surface is largely caused by the oxidation of aluminum, here we come to a detailed analysis of the chemical shall predisposing factor.

Atmospheric Environment. The air is rich in oxygen, and a small amount of sulfur. Aluminum is a very active metal, pure aluminum is exposed to air for too long and will surface oxidation, we usually call it "passive film", to some extent, the internal aluminum passivation film It played a protective role in preventing further corrosion and oxidation of aluminum. Due to China's industrial development, air pollution is more serious, the industrial exhaust gas has serious corrosive sulfides, nitrides, carbides, etc. more and more severe corrosive gas activity coupled with aluminum elements, they it led to the wire surface of the aluminum composition of a chemical reaction, thus causing the wire surface black.