Bare aluminium conductors are electrical conductors made from pure aluminium. They are used in various electrical applications, including overhead power transmission and distribution lines.
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It is understood that the progress will be fully updated by the 20th. The forbidden left sign on the new "on-the-job" guide was replaced by the LED electronic display for the first time, making it the biggest change in this guide. During the time when the left side is prohibited, the guiding sign of the innermost lane is a straight arrow, and when the time for releasing the left is released, the straight line flag will automatically “change face†to the left turn arrow, and the prompt text will also be displayed, such as “23 points to lift the ban. Left". The old version of the forbidden left sign is indicated by the time of the left arrow and the left hand. In addition to the guide "upgrade", the guiding signs have also changed. At the intersection of Zhengyi Road, the updated road sign is brighter than the original and the area is larger. The Municipal Traffic Management Bureau Order Office told the reporter that the new sign area is 3 × 5 meters, which is indeed larger than the original one, and the reflective paint on the logo surface has adopted diamond-grade luminescent materials for the first time, and the recognition at night is clearer. At the same time as the logo is updated, the hanging arm of the hanging sign is also 2 meters longer than the original, making it easier for the driver to see the sign. 
Bare aluminium conductors have several advantages over other types of conductors. Firstly, aluminium is lighter than copper, which makes it easier to handle and install. This is particularly important for overhead power lines, where the weight of the conductor can have a significant impact on the cost and feasibility of the project.
Secondly, aluminium has a higher conductivity-to-weight ratio than copper. This means that for a given weight, aluminium conductors can carry more current than copper conductors. This makes them more efficient in terms of power transmission.
However, bare aluminium conductors also have some disadvantages. One major drawback is their lower mechanical strength compared to copper conductors. This makes them more susceptible to sagging and stretching under the weight of their own span, especially in hot weather conditions. To address this issue, aluminium conductors are often reinforced with steel strands to improve their mechanical strength.
Another disadvantage is that aluminium has a higher resistance than copper, which can result in higher power losses and voltage drops. To mitigate this, aluminium conductors are typically designed with larger cross-sectional areas compared to copper conductors to compensate for the higher resistance.
Overall, bare aluminium conductors are widely used in electrical power transmission and distribution systems due to their cost-effectiveness, lightweight, and high conductivity-to-weight ratio. However, careful design and installation considerations are necessary to ensure their mechanical strength and minimize power losses.
Topic: Application Recently, Beijing Chang'an Street refers to road signs and guides to be updated one after another. The new “on-the-job†guideline forbidden left sign was replaced by LED electronic display for the first time. In the future, the public can see an intelligent and clearer marking system on Chang'an Street.