Glavna sirovina kabela je vodič, a cijena bakra i aluminija je vrlo različita. Stoga je cijena bakrenih kabela s istim poprečnim-presjekom nekoliko puta veća od cijene aluminijskih kabela.
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.
Nestabilnost kabelskog spoja s aluminijskom jezgrom prouzročit će oksidacijsku reakciju sa zrakom, što će rezultirati povećanjem otpora kabelskog vodiča, što će uzrokovati zagrijavanje vodiča i prouzročiti nesreću, dok je spoj kabela s bakrenom jezgrom stabilniji i neće uzrokovati nesreću zbog oksidacije. Stabilnost je mnogo veća nego kod kabela s aluminijskom jezgrom. I temperatura grijanja je niska. Pod istom strujom, vrijednost grijanja kabela s bakrenom jezgrom s istim poprečnim presjekom mnogo je manja od one kabela s aluminijskom jezgrom, što rad čini sigurnijim.
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.
Iz gornje situacije, kabel s bakrenom jezgrom ima prednosti niske otpornosti, dobre duktilnosti, dobre elastičnosti, dobre otpornosti na oksidaciju i velikog kapaciteta nosivosti struje, te ima izvanredne prednosti u napajanju kabela. Naravno, aluminijski kabeli imaju i svoje prednosti. Cijena je relativno jeftina i lakša. S ekonomskog stajališta, ako se radi o privremenoj liniji, mogu se koristiti aluminijski kabeli.
