是絕緣材料不同.
VV是聚氯乙烯絕緣聚氯乙烯護(hù)套
YJV是交聯(lián)聚氯乙烯絕緣聚氯乙烯護(hù)套
正是因?yàn)椴牧喜煌?
所以VV與YJV電纜允許長(zhǎng)期工作最高溫度不同,
VV:電纜導(dǎo)體的允許長(zhǎng)期工作最高溫度為70℃
YJV:電纜導(dǎo)體允許長(zhǎng)期最高工作溫度為90℃.
所以兩種電纜載流量不同,YJV大一些,
但YJV電纜價(jià)格上要比VV貴.
YJV
Y----聚乙烯 J-----交聯(lián) V----聚氯乙烯護(hù)套 0.6/1kV交聯(lián)聚乙烯絕緣電力電纜 XLPE Insulated Power Cable 產(chǎn)品標(biāo)準(zhǔn) standard 本產(chǎn)品按GB12706《額定電壓35KV銅芯、鋁芯塑料絕緣電力電纜》標(biāo)準(zhǔn)生產(chǎn),同時(shí)還可根據(jù)用戶需要按國(guó)際電工委員會(huì)推薦標(biāo)準(zhǔn)IEC、英國(guó)標(biāo)準(zhǔn)、德國(guó)標(biāo)準(zhǔn)及美國(guó)標(biāo)準(zhǔn)生產(chǎn).The product is manufactured according to the standard of GB12706、IEC.BS,DIN and ICEA upon request.適用范圍 Applications 本產(chǎn)品適用于工頻額定電壓64/1KV及以下配電網(wǎng)或工業(yè)裝置中固定敷設(shè)之用.The product is suitable for use in power distribution lines or fixed installations with rated power- frequency voltage up to and including 0.6/1Kv.使用特性 Operating characteridtles ·工頻額定UO/U為0.6/1KV.Rated power –frequency voltage UO/U為0.6/1KV.電纜導(dǎo)體允許長(zhǎng)期最高工作溫度為90℃.Max.permissible continuous operating temperature of conductor:90℃.短路時(shí)（最長(zhǎng)持續(xù)時(shí)間不超過5s）電纜導(dǎo)體的最高溫度不超過250℃.Max.short –circuit temperature of conductor shall not exceed 250℃(5s maximum duration ).電纜敷設(shè)時(shí)環(huán)境溫度應(yīng)不低于0℃.The ambient temperature under installation should not below 0℃.電纜彎曲半徑：不小于電纜外徑的15倍.The bending radius should not less than 15 times of cable diameter
VV
工頻額定電壓Uo/U為0.6/1KV.Rated power-frequency voltage Uo/U:0.6/1KV.電纜導(dǎo)體的允許長(zhǎng)期工作最高溫度為70℃ Max.permissible continuous operating temperature of conductor:70℃ 短路時(shí)（最長(zhǎng)持續(xù)時(shí)間不超過5s）電纜導(dǎo)體的允許最高溫度：導(dǎo)體截面 ≤ 300mm2 – 160℃； 導(dǎo)體截面 300 – 140＞℃； Max.short-circuit temperature of the conductor shall not excssd:(5smaximum duration).Cross-section of conducter ≤ 300mm2 – 160℃； Cross-section of conducter ＞ 300mm2 – 140℃,電纜敷設(shè)時(shí)環(huán)境溫度應(yīng)不低于0℃.The ambient temperature under installation should should not below0℃ 電纜彎曲半徑不小于電纜外徑10倍.The bending radius of a cable should not be less than 10 times of the cable diameter.電纜的型號(hào) Type of cable