• 電力電纜
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    電力電纜截面選擇導線的3個新方式

    來源:昆明泰昆電纜制造有限公司 發布時間:2019-03-02 返回

      電力電纜截面選擇導線的3個新方式:

    1、按允許載流量選擇導線截面

    電線電纜中通電流時,由于導體電阻的存在,電流使導體產生熱效應,使導體溫度升高,同時向導體周圍介質散發熱量.導線或電纜的絕緣介質,所允許承受的最高溫度td,必須大于載流量導體表面的最高溫度tm,及td > tm,才能使絕緣介質不燃燒,這就需要選擇較為合適的導線截面。


      2、按允許電壓損失選擇導線截面

      在電力系統中,各種用電設備隨工作狀態的變化而改變用電量的多少,如機械加工、電弧爐、升降機、刨床等。因此造成了實際電壓和用電設備的額定電壓存在一定的差值,而各種用電設備所允許的電壓差是有一定范圍的。

    電力電纜

      3、按機械強度選擇導線和電纜的截面

      配電導線和電纜在正常運行時,由于受其自身重量以及外部風、雨、雪、冰燈外部作用力的影響,在安裝過程中也要受到拉伸力的作用,為保證在安裝運行時不因導線折斷,而中斷正常供電和發生其他事故,有關部門規定了在各種不同的敷設條件下,電線電纜按機械強度的最小截面,以此來選擇導線和電纜的截面。


      以上就是昆明泰昆電纜公司小編給大家介紹的電力電纜截面選擇導線的3個新方式,電纜的截面選擇在遵循上述原則的基礎上,還必須滿足熱穩定性校驗。希望能幫助到您,歡迎您的來電咨詢!

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