What are the advantages of aluminum alloy cables? How to check for faults?

1. Electrical conductivity: The electrical conductivity of the aluminum alloy cable is 61.5% of the common reference material copper IACS, and the current carrying capacity is 79% of that of copper, which is better than the pure aluminum standard.

2. Tensile strength and elongation. Compared with pure aluminum conductors, aluminum alloy conductors have been added with special components and adopted special processing techniques, and their tensile strength and elongation have been greatly increased to 30%, making them safer and more reliable to use.

3. Creep resistance: The alloy material and annealing process of the aluminum alloy cable reduce the "creep" tendency of the conductor under heat and pressure. Compared to pure aluminum, creep resistance can be improved by 300%, avoiding relaxation problems caused by cold flow or creep.

4. Flexibility. Due to the good bending properties of aluminum alloy, its unique alloy formula and processing technology greatly improve the flexibility. The flexibility of aluminum alloy is 30% higher than that of copper, and the elasticity is 40% lower than that of copper. The bending radius of copper cables is generally 10 to 20 times the outer diameter, while the bending radius of aluminum cables is only 7 times the outer diameter, making it easier to connect terminals.

5. Strong self-weight bearing capacity, aluminum alloy cable improves the tensile strength of pure aluminum, aluminum cable can support 4000 meters of self-weight, copper cable can only support 2750 meters. This advantage is particularly prominent in large-span buildings such as stadiums and wiring.

6. Anti-corrosion performance, the inherent anti-corrosion performance of aluminum comes from the thin and firm oxide layer formed when the aluminum surface is in contact with air, which is particularly resistant to various forms of corrosion.

8. Compaction characteristics: Considering the volume conductivity alone, aluminum alloy is inferior to copper. However, the conductors we developed not only improved the material properties, but also made great breakthroughs in the process.

How to check the failure of aluminum alloy cable?

1. Use the aluminum alloy cable fault distance meter to measure the distance. In fact, it is necessary to judge whether the fault of the aluminum wire is high resistance, low resistance or grounding. Depending on the situation, different test methods are used. In the case of a ground fault, the distance is measured directly using the low voltage pulse method of the cable fault distance meter. If the fault is high resistance, use the high voltage pulse discharge method to measure the distance. High-voltage pulse discharge ranging requires a lot of auxiliary equipment, such as high-voltage pulse capacitors, discharge balls, current limiting resistors, inductor coils, signal samplers, etc. It is cumbersome and unsafe to operate. There is a certain risk, the analysis of the sampling waveform is troublesome, and the knowledge of the tester is high.

2. Find the path. Find the path, add a signal to the aluminum wire (path signal generator), and receive the signal with the receiver. Using the signal on the path, determine the aluminum alloy cable path. But the path has a range of around 1-2 meters and is not particularly accurate.

3. According to ranging positioning, this is the sound produced by the ignition discharge. When the earphone of the aluminum wire fault tester hears a loud noise, it will also find the location of the fault point. But because you're listening, you need to spend a lot of time discovering the effects of ambient noise, sometimes at night; when it comes to cross-linked cables, it takes more time, because cross-linked aluminum cables are usually internally discharged and the sound is very loud Low, barely audible.

4. Measure. Therefore, most aluminum alloy cable failures can be solved this way.