太陽能光伏BVR4接地線使用要求
工作接地方式主要有以下三種類型:(1)中性點非直接接地方式(I-T)。用電設備中性點不接入大地,(2)單個保護接地方式(T-T)。電源變壓器的中性點直接接地,用電設備外殼可導電部分直接接入大地(3)中性點直接接地方式(T-N)。在這種方式中,電力系統(tǒng)變壓器中性點直接接地,用電設備外殼可導電部分通過接地引下線和接地系統(tǒng)作良好的金屬性連接,。
接地線、短路接地線使用說明以及維護一、接地,接地短路包括: 由短路接地絕緣操作桿、線夾、短路線、接地端子、結夾、接地夾等?!《?、接地短路接地部分功能:(1)線夾、接地夾采用優(yōu)質鋁合金壓鑄、高強度。(2)操作桿與進口環(huán)氧樹脂精制成彩色管,絕緣性能好,強度高,重量輕,顏色明亮,光滑的外觀。分類的短路接地包括: (1)分相接地,結合型線?!?2)使用不同的電壓,單節(jié)式、多型操作?!?3)一個變電站、線路短路接地。
攜帶型短路接地線應妥善保管。每次使用前,均應仔細檢查其是否完好,軟銅線無祼露,螺母不松脫,否則不得使用。
新工作人員必須經(jīng)過對接地線使用的培訓、學習,考核合格后,方能單獨從事接地線操作或使用工作。
根據(jù)中性線與保護線是否合并的情況,TN系統(tǒng)又分為TN-C、TN-S及TN-C-S系統(tǒng)。 TN-C系統(tǒng):保護線與中性線合并為PEN線。 TN-S系統(tǒng):保護線與中性線分開。 TN-C-S系統(tǒng):在靠近電源側一段的保護線和中性線合并為PEN線,從某點以后分為保護線和中性線。
光伏接地線廠家:接地線的注意事項1、工作之前必須檢查接地線。軟銅線是否斷頭,螺絲連接處有無松動,線鉤的彈力是否正常,不符合要求應及時調換或修好后再使用。2、掛接地線前必須先驗電,未驗電掛接地線是基層中較普遍的習慣性違章行為,在懸掛時接地線道體不能和身體接觸。3、在工作地點兩段兩端懸掛接地線,以免用戶倒送電、感應電的可能,深受其害的例子不少。4、在打接地樁時,要撥能借地體能快速疏通事故大電流,保證接地質量。5、要愛護接地線。接地線在使用過程中不得扭花,不用時應將軟銅線盤好,接地線在拆除后,不得從空中丟下或隨地亂摔,要用繩索傳遞,注意接地線的清潔工作。6、新工作人員必須經(jīng)過對接地線使用的培訓、學習,考核合格后,方能單獨從事接地線操作或使用工作。7、按不同電壓等級選用對應規(guī)格的接地線。8、嚴禁使用其它金屬線代替接地線。9、現(xiàn)場工作不得少掛接地線或者擅自變更掛接地線地點。10、接地線具有雙面性,它具有安全的作用,使用不當也會產(chǎn)生破壞效應,所以工作完畢要及時拆除接地線。帶接地線合開關會損壞電氣設備和破壞電網(wǎng)的穩(wěn)定,會導致嚴重的惡性電氣事故。
f Bedford, who from all accounts seems to he been a misshapen monstrosity with an enormous head, said something offensive about Pickering at a banquet, and a challenge from the irate knight was the immediate result; Dudley, of all men, being the bearer thereof, always at this time ready to wound the extreme Protestant party, to which Bedford belonged. But Pickering was as distasteful to Catholics as to Protestants. On one occasion he was about to enter the private chapel inside the Queen’s apartments at Whitehall, when he was met at the door by the Earl of Arundel, who told him he ought to know that that was no place for him, but was reserved for the lords of the Council. Pickering answered that he knew that very well, and he also knew that Arundel was an impudent kne. The Earl was no hero, and Pickering went swaggering about the Court for days bling the story. With such a swashbuckler38 as this for a rival, it is not surprising that the handsome and youthful Dudley rapidly passed him in the race for his
接地線的接地方式的基本組成接地方式的組成部分可分為電氣設備和配電系統(tǒng)兩部分。
嚴禁使用其它金屬線代替接地線。
防雷接地 :光伏電站由于占地面積相對較大,周圍地勢多相對平緩且廠區(qū)內無高大建筑,其防雷措施主要為: (1)加設避雷針以防止直擊雷并滿足保護半徑,高度多在20-35米。但為了保證光伏電池組件的運行安全和效率,應避免對組件造成遮擋陰影。 (2)光伏組件支架可靠接地。 (3)匯流箱進出端口處加設避雷器。
土壤電阻率是單位長度土壤電阻的平均值,單位是歐姆?米。土壤電阻率的大小主要取決于土壤中導電離子的濃度、土壤含水量和土質顆粒的大小,
January, 1584, Catharine sought her son at Chateau-Thierry, and at last persuaded him to a reconciliation with his brother, and took him to Paris with her. There, with tears and repentance on both sides, the brothers embraced each other, and the King promised his help towards another expedition to Flanders. Alen?on returned to Chateau-Thierry to make his preparations, and there fell grely ill. Guise, the Spaniards, and the Archbishop of Glasgow in Paris, were busy at the time planning the invasion of England and the liberation of Mary Stuart; and Catharine, in April, hastened to Alen?on with a new project—that he should share in the plot and marry his sister-in-law, the Scottish Queen. But his health was broken. For the next two months he
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根據(jù)要求方便掛短路接地選擇型的夾具。選擇接地桿操作應該工作在和諧與懸點系統(tǒng),額定電壓,懸掛應保證員工當短路接地,接地和電氣設備必要的安全距離。在前面的架接地工作結束后的員工應保持接地導體保持安全距離。使用類型與短路接地、經(jīng)驗確認已經(jīng)停電、設備再沒有電壓。接地夾連接到互聯(lián)網(wǎng)第一,然后操作桿分別線端端子夾。接地短路接地維護:類型與短路接地應在空氣流通、干燥的環(huán)境中特殊的沉積位置,應仔細檢查每次使用之前。發(fā)現(xiàn)夾子開裂、松散連接、護套損壞、銅線裸露應禁止使用