Il-materja prima ewlenija tal-kejbil hija l-konduttur, u l-prezz tar-ram u l-aluminju huwa differenti ħafna. Għalhekk, il-prezz tal-kejbils tar-ram bl-istess cross-sezzjoni huwa bosta drabi ogħla minn dak tal-kejbils tal-aluminju.
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.
L-instabilità tal-ġonta tal-kejbil tal-qalba tal-aluminju se tikkawża reazzjoni ta 'ossidazzjoni mal-arja, li tirriżulta f'żieda fir-reżistenza tal-konduttur tal-kejbil, li tikkawża li l-konduttur jisħon u jikkawża inċident, filwaqt li l-ġonta tal-kejbil tal-qalba tar-ram hija aktar stabbli u mhux se jikkawża inċident minħabba ossidazzjoni. L-istabbiltà hija ħafna ogħla minn dik tal-kejbils tal-qalba tal-aluminju. U t-temperatura tat-tisħin hija baxxa. Taħt l-istess kurrent, il-valur tat-tisħin tal-kejbil tal-qalba tar-ram bl-istess sezzjoni huwa ħafna iżgħar minn dak tal-kejbil tal-qalba tal-aluminju, u jagħmel l-operazzjoni aktar sigura.
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 transmission distance, the copper core cable can ensure higher voltage quality; under the condition of the allowable voltage drop, the copper core cable can transmit energy 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.
Mis-sitwazzjoni ta 'hawn fuq, il-kejbil tal-qalba tar-ram għandu l-vantaġġi ta' reżistenza baxxa, duttilità tajba, elastiċità tajba, reżistenza tajba għall-ossiġnu, u kapaċità kbira ta 'ġarr tal-kurrent. Għandu vantaġġi pendenti fil-provvista tal-enerġija tal-kejbil. Naturalment, il-kejbils tal-aluminju għandhom ukoll il-vantaġġi tagħhom stess. Il-prezz huwa relattivament irħis u eħfef. Mil-lat ekonomiku, jekk tkun linja temporanja, jistgħu jintużaw kejbils tal-aluminju.
