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銅包鋁電線和純銅電線的區別

信息來源www.rodapunk.com | 發布時間2021年10月14日

銅包鋁電線和純銅電線的區別

  1、機械性能

  純銅導體強度、伸長率比銅包鋁導體大,也就是說純銅在機械性能方面比銅包鋁好。銅包鋁導體比純銅輕很多,因此銅包鋁的電纜在整體重量上比純銅導體電纜要輕,這樣會給電纜的運輸和電纜的架設施工帶來方便。另外銅包鋁比純銅軟一點,用銅包鋁導體生產的電纜在柔軟性方面比純銅的電纜好一點。

  2、電氣性能

  因為鋁的導電性比銅差,使得銅包鋁導體的直流電阻比純銅導體大。當頻率超過5MHz時,此時的交流電阻衰減在這兩種不同的導體下沒有明顯的區別。在5MHz情況下,電流在近表面的約0.025毫米厚度中流動,而銅包鋁導體的銅層厚度比此厚度多約一倍。

  3、經濟性

  銅包鋁導體的價格要比相同重量的純銅導體貴一些。但是同樣重量的銅包鋁要比純銅導體長度長很多,而電纜是按長度計算的。相同重量,銅包鋁線是銅線長度的2.5倍,價格是每噸多幾百元。綜合下來,銅包鋁就很有優勢。

  4、易維護性

  使用銅包鋁能減少網絡故障,避免網絡人員在維護時“冬子剪芯,夏子剪皮”(鋁帶縱包或鋁管產品)。

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