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在介紹光(guang)伏(fu)電纜(lan)之前，我們先來看看什(shen)么是光(guang)伏(fu)系統（PV system）。

太(tai)(tai)陽(yang)能(neng)電(dian)(dian)(dian)(dian)纜，也稱為光(guang)(guang)(guang)(guang)伏電(dian)(dian)(dian)(dian)纜或光(guang)(guang)(guang)(guang)伏線(xian)(xian)，是(shi) 用(yong)于互連(lian) 光(guang)(guang)(guang)(guang)伏系統的太(tai)(tai)陽(yang)能(neng)電(dian)(dian)(dian)(dian)池板的單(dan)芯線(xian)(xian)。光(guang)(guang)(guang)(guang)伏系統或太(tai)(tai)陽(yang)能(neng)電(dian)(dian)(dian)(dian)池板捕獲陽(yang)光(guang)(guang)(guang)(guang)，以便通過(guo)能(neng)量轉換過(guo)程發電(dian)(dian)(dian)(dian)。電(dian)(dian)(dian)(dian)力在面(mian)板上產生，需要(yao)布線(xian)(xian)將電(dian)(dian)(dian)(dian)能(neng)傳送回(hui)收集點或設(she)備。太(tai)(tai)陽(yang)能(neng)線(xian)(xian)是(shi)為光(guang)(guang)(guang)(guang)伏應用(yong)創建的一種特定(ding)類型的電(dian)(dian)(dian)(dian)線(xian)(xian)。

光(guang)伏(fu)線(xian)(xian)最初設計為(wei)(wei)單導體，其結構類似于(yu) UF 型(xing)（地下饋(kui)線(xian)(xian)）或(huo) USE-2 型(xing)（額定用(yong)(yong)于(yu) 90°C 潮濕(shi)應(ying)用(yong)(yong)的地下服(fu)務入口(kou)線(xian)(xian)）。然而，由于(yu)一(yi)些太陽能(neng)應(ying)用(yong)(yong)規模龐大，它們產生(sheng)的電量被認為(wei)(wei)是公用(yong)(yong)事業(ye)規模。如此大的功率(lv)需要一(yi)根大導體，通(tong)常稱為(wei)(wei)集電極電纜，通(tong)過增加現(xian)在 UL 主題 4703 修(xiu)訂版下的 UL 列名光(guang)伏(fu)線(xian)(xian)的尺寸來(lai)解決這個問題。

UL 主題 4703 中允許(xu)的(de)(de)(de)新電(dian)壓額定值現在可(ke)以適(shi)應大于 1,000 伏的(de)(de)(de)電(dian)壓。通過將(jiang)直流發電(dian)板串聯在一起，可(ke)以將(jiang)整個陣列中的(de)(de)(de)電(dian)壓提(ti)高到相當高的(de)(de)(de)水平，這是較高電(dian)壓的(de)(de)(de)原(yuan)因。