隨著市場對光伏電站的持續需求以及相關配套產品技術的優化和提升，直流光伏電纜和認證也更新了好幾款版本，我們針對于常見的兩種型號的光伏電纜容易弄錯的電壓問題做個有憑有據的講解，可以讓項目方的設計、施工、采購等部門對選品有個直觀的認識，同時也能增強電纜銷售人員對電纜知識的掌握，給用戶推薦到需要的那款。

一、直流光伏電纜型號之PV1-F

（圖一，較早萊茵TUV認(ren)證版本(ben)）

       根(gen)據證書圖片內(nei)(nei)容顯示，直流光伏(fu)電(dian)(dian)(dian)(dian)(dian)(dian)纜DC：1.8KV，括號里備(bei)注(zhu)翻譯過來的(de)(de)意思可以(yi)理(li)解為空載電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)zui大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)是(shi)1800V，并非是(shi)實際(ji)工(gong)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)（額定電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)），接入(ru)負(fu)載后電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)有(you)電(dian)(dian)(dian)(dian)(dian)(dian)流輸出至負(fu)載，電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)內(nei)(nei)阻上有(you)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)損耗，電(dian)(dian)(dian)(dian)(dian)(dian)纜輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)會(hui)降低。那(nei)么(me)會(hui)有(you)人問這(zhe)個適合多(duo)大(da)(da)的(de)(de)直流電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)線纜，按照(zhao)GB12528.1統(tong)一計算，即同一根(gen)電(dian)(dian)(dian)(dian)(dian)(dian)纜，直流的(de)(de)額定電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)是(shi)交流電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)(de)1.5倍，根(gen)據AC工(gong)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)/zui大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)：0.6/1KV可以(yi)推導出直流電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)DC：0.9/1.5KV

（圖二，現階段萊茵TUV版本）

       根據證書圖片內容顯示，直流光伏電纜DC：1.0KV，無括號備注，通常意義來說這是指直流額定電壓為1000V，也是工作電壓的意思。

二、直流光伏電纜型號之H1Z2Z2-K

（圖三，現階段南德TUV版本）

       根據(ju)證書圖片顯示，直流光(guang)伏電(dian)(dian)纜電(dian)(dian)壓DC：1500V，括號里(li)備注翻譯(yi)過(guo)來的意思可以理解為回路電(dian)(dian)壓為1500V（負載時的電(dian)(dian)壓）。

如果用戶說需要提(ti)供(gong)一款(kuan)1500V的光伏電纜(lan)，保險起見建議(yi)提(ti)供(gong)H1Z2Z2-K這款(kuan)。