Bahan baku utama kabel adalah konduktor, dan harga tembaga dan aluminium sangat berbeda. Oleh karena itu, harga kabel tembaga dengan penampang-yang sama beberapa kali lebih tinggi daripada harga kabel aluminium.
The difference in electrical conductivity, the resistance of the aluminum core cable is about 1.68 times higher than that of the copper core cable, while the resistivity of the copper core cable is relatively low. The conductivity of copper core cables is generally higher than that of aluminum core cables.
Compared with aluminum cables, copper cables have better ductility, and metals have good ductility, such as gold, platinum, copper, silver, tungsten, and aluminum. percent , the elongation rate of copper for electrical use is above 30 percent .
Due to the difference in characteristics of copper and aluminum, copper cables have good fatigue resistance, are not easily broken by repeated bending by hand, and have good fatigue strength, while aluminum is easily broken. In terms of elasticity index, copper is about 1.71.8 times higher than aluminum. The elasticity of the copper core cable is much higher than that of the aluminum core cable. It is not easy to break after repeated bending, and has better flexibility. The core cable has high mechanical strength, can withstand greater external force damage, and provides greater convenience in the construction process.
Ketidakstabilan sambungan kabel inti aluminium akan menyebabkan reaksi oksidasi dengan udara, yang mengakibatkan peningkatan resistansi penghantar kabel, menyebabkan penghantar menjadi panas dan menyebabkan kecelakaan, sedangkan sambungan kabel inti tembaga lebih stabil dan tidak akan menyebabkan kecelakaan karena oksidasi. Stabilitasnya jauh lebih tinggi daripada kabel inti aluminium. Dan suhu pemanasan rendah. Di bawah arus yang sama, nilai panas kabel inti tembaga dengan penampang yang sama jauh lebih kecil daripada kabel inti aluminium, membuat operasi lebih aman.
If a copper cable is used, the same current flows through the same section due to the lower resistivity of the copper core cable. The voltage drop of copper core cable is small. In the same power transmission distance, the copper core cable can ensure higher voltage quality; under the condition of allowable voltage drop, the copper core cable can transmit power to a longer distance, that is, the power supply coverage area is large, which is conducive to the planning of the network and reduces the Set number of power supply points. The resistance of aluminum core cable is higher, and its performance is much lower than that of copper core cable.
Dari situasi di atas, kabel inti tembaga memiliki keunggulan resistivitas rendah, keuletan yang baik, elastisitas yang baik, ketahanan oksidasi yang baik, dan daya dukung arus yang besar, dan memiliki keunggulan luar biasa dalam catu daya kabel. Tentu saja kabel aluminium juga memiliki keunggulan tersendiri. Harganya relatif lebih murah dan lebih ringan. Dari sudut pandang ekonomi, jika itu adalah saluran sementara, kabel aluminium dapat digunakan.
