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YJV2*70平方高壓電纜電力電纜出廠價

6kV~35kV 中低壓銅芯及鋁芯交聯(lián)聚乙烯絕緣電力電纜（YJV電纜，YJV22電纜，YJLV電纜，YJLV22電纜）XLPE Insulated Power Cable

A類系統(tǒng)──該類系統(tǒng)任何一相導(dǎo)體與地和接地導(dǎo)體接觸時，能在1min內(nèi)與系統(tǒng)分離
B類系統(tǒng)──該類系統(tǒng)僅包括單相接地故障短時運行的條件，接地故障時間應(yīng)不超過1h, 但在任何情況下，Z長不超過8h每年接地故障總持續(xù)時間不超過125h；
C類系統(tǒng)──不屬于A類、B類的系統(tǒng)。
System category A──This category comprises those systems in which any phase conductor that comes in contact with earth or an earth conductor. is disconnected from the system within 1 min.
System category B ──This category comprises those system which,under faultconditions,are operated,are operated for ashorttimewith one phase earthed.This period should not exceed 1 h..Fora longer period, not exceeding 8h on any occasion, can be tolerated.The total duration of earth faults in any year should not exceed 125h.
System categeory C──This category comprises all systems which do not fall into A and B
電纜的型號Type of cable

型號 Type	名稱 Designation	適用范圍 Application
YJV	銅芯交聯(lián)聚乙烯絕緣氯乙烯護(hù)套電力電纜 Copper conductor,XLPE insulated and PVC sheathed power cable	室內(nèi)、隧道及電纜溝等場所，不能承受機械外力。單芯電纜不允許敷設(shè)在磁性管道中。 For laying indoors 、 intunnel or cable trench,unable to bear external mechan-icalforces.Single-core cable in magnetic duct is not permissible
YJLY	鋁芯交聯(lián)聚乙烯絕緣乙烯護(hù)套電力電纜 Aluminium conductor, XLPE insulated and PVC sheathed power cable
YJY	銅芯交聯(lián)聚乙烯絕緣氯乙烯護(hù)套電力電纜 Copper conductor ,XLPE insulated and PEsheathed power cable
YJLY	鋁芯交聯(lián)聚乙烯絕緣氯乙烯護(hù)套電力電纜 Alumimium conductor ,XLPE

導(dǎo)體的概念：即是能夠讓電流順利通過的金屬載體材料。導(dǎo)體必須有良好的導(dǎo)電性能、物理機械性能、工藝性能和防腐性能。就導(dǎo)電性能來說，金屬依次為銀、銅、金、鋁、鎳、鋼、合金。但是由于金屬銀的價格昂貴，所以我們在電纜當(dāng)中多采用銅絲，一般在20℃銅的電阻率為 0.0175 Ω · mm2/m。我們?yōu)榱吮ＷC導(dǎo)體能夠充分的滿足電纜應(yīng)有的性能，在電纜導(dǎo)體中我們多選擇無氧銅。氧的含量不大于0.03％，雜質(zhì)總含量不大于0.05％，銅的純度大于99.95％的銅就叫無氧銅。無氧銅無氫脆現(xiàn)象，導(dǎo)電率高，加工性能、焊接性能、耐蝕性能和低溫性能都非常的良好

YJV2*70平方高壓電纜電力電纜出廠價