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大量供應(yīng)光伏板黃綠BVR2.5接地線

家用電器設(shè)備由于絕緣性能不好或使用環(huán)境潮濕，會(huì)導(dǎo)致其外殼帶有一定靜電，嚴(yán)重時(shí)會(huì)發(fā)生觸電事故。為了避免出現(xiàn)的事故可在電器的金屬外殼上面連接一根電線，將電線的另一端接入大地，一旦電器發(fā)生漏電時(shí)接地線會(huì)把靜電帶入到大地釋放掉。另外對(duì)于電器維修人員在使用電烙鐵焊接電路時(shí)，有時(shí)會(huì)因?yàn)殡娎予F帶電而擊穿損壞電器中的集成電路，這一點(diǎn)比較重要。使用電腦的朋友有時(shí)也會(huì)忽略主機(jī)殼接地，其實(shí)給電腦主機(jī)殼接根地線，在一定程度上可以防止死機(jī)現(xiàn)象的出現(xiàn)。在電力系統(tǒng)中接地線：是為了在已停電的設(shè)備和線路上意外地出現(xiàn)電壓時(shí)保證工作人員的重要工具。按部頒規(guī)定，接地線必須是以上裸銅軟線制成電器中，接地線就是接在電氣設(shè)備外殼等部位及時(shí)的將因各種原因產(chǎn)生的不安全的電荷或者漏電電流導(dǎo)出的線路。
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掛接地線前必須先驗(yàn)電，未驗(yàn)電掛接地線是基層中較普遍的習(xí)慣性違章行為，在懸掛時(shí)接地線道體不能和身體接觸。
使用攜帶型短路接地線前，應(yīng)先驗(yàn)電確認(rèn)已停電，在設(shè)備上確認(rèn)無電壓后進(jìn)行。先將接地線夾連接在接地網(wǎng)或扁鐵件上，然后用接地操作棒分別將導(dǎo)線端線類擰緊在設(shè)備導(dǎo)線上。拆除短路接地線時(shí)，順序正好與上述相反。

土壤電阻率是單位長(zhǎng)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(dǎo)電離子的濃度、土壤含水量和土質(zhì)顆粒的大小，

現(xiàn)今，隨著光伏發(fā)電技術(shù)的日趨成熟和大量已建成光伏電站的運(yùn)營(yíng)，系統(tǒng)安全性已經(jīng)成為了保障日常生產(chǎn)的重要因素。以往許多人們對(duì)于“小容量”光伏電站的接地、防雷問題并不重視，但隨著太陽能電池板功率和電站系統(tǒng)容量的增大，近年來由于接地不良造成的人身觸電傷亡事件已為數(shù)不少。本文將列舉在建設(shè)過程中可能會(huì)遇到的接地施工問題并淺析接地技術(shù)。 
r several months again the Court was a hot-bed of intrigue, in which Norfolk, Sus, and the Conservative party, aided by Guzman, and cautiously supported by Cecil and Bacon, were pitted against Leicester and the French ambassador. From day to day the fickle Queen changed. First Sus was to be hurried off at once, then he was to go after Shrovetide; then when he had prepared for his journey Elizabeth told him he would not lee so quickly as he thought. With Leicester, too, she was equally changeable, one day turning her back upon him, and the next begging the Spanish ambassador to be friendly with him. On one occasion in February, 1567, when the Council had progressed very far in the settlement of Sus’s instructions, Leicester’s Purita

現(xiàn)場(chǎng)工作不得少掛接地線或者擅自變更掛接地線地點(diǎn)。

懸掛點(diǎn)如有接地點(diǎn)，應(yīng)用接地線夾或?qū)Ｓ勉~棒作接地連接;如無固定接地點(diǎn)可利用;則可用臨時(shí)接地點(diǎn)，接地極埋入地下深度應(yīng)不小于0.6m。
高壓短路接地線對(duì)地電阻要求決定了接地線的品質(zhì)，一般按照電力行業(yè)DL-T879-2004技術(shù)規(guī)定要求每個(gè)截面積的接地線對(duì)地電阻不的大于下列數(shù)值：接線鼻之間測(cè)量直流電阻，對(duì)于16mm2 ，25mm2，35mm2，50mm2，70mm2，95mm2，120mm2的各種截面，平均每米的電阻值應(yīng)分別小于1.24mΩ， 0.79mΩ，0.56mΩ，0.40mΩ，0.28mΩ，0.21mΩ，0.16mΩ[1] 。

通過在青海等地進(jìn)行光伏電站EPC總承包和調(diào)研工作，發(fā)現(xiàn)在建設(shè)過程中接地系統(tǒng)常見的施工問題如下： （1）接地引下線和避雷帶焊接長(zhǎng)度不夠（圓鋼不應(yīng)小于六倍直徑，扁鋼不小于兩倍寬度）；焊接不合格，焊接處有焊瘤、氣孔和夾渣；未敲除焊渣。 （2）接地引下線、避雷帶變形，脫離支架。 （3）用結(jié)構(gòu)金屬材料代替避雷針及接地引下線，鍍鋅焊接后未刷防腐漆。 （4）接地體引下線未做防腐處理。 （5）接地線穿墻時(shí)未加設(shè)保護(hù)套管。 （6）屋內(nèi)電氣設(shè)備外殼未與接地系統(tǒng)連接。 （7）電氣設(shè)備接地線未與地網(wǎng)連接。 （8）接地體、地網(wǎng)安裝敷設(shè)過淺（不應(yīng)小于0.8米；若有凍土層，則應(yīng)敷設(shè)在凍土層以下）。 
ubject. “I saw she was pleased, as she no dou thought that if the Archduke heard any of the idle tales they tell about her (and they tell many) he might take advantage of them to the detriment of her honour if the match were broken off, although, from this point of view, I was not sorry, as the fear may not be without advantage to us.” But to the Queen he expressed himself shocked that she should think of such a thing as he had done previously when Lady Sidney had hinted at a similar dou. For the next two months an elaborate attempt was made to keep up the appearance of cordiality towards the Archduke’s match, and the Spanish party was still further beguiled by the sudden tendency of the Queen to ile on Catholici. Candles and crucifixes were placed on the altar in the Chapel Royal, and the Queen entertained the Bishop 
使用接地短路接地通知：(1)完成測(cè)試類型后一般短路接地被短路應(yīng)該廢棄處理。(2)攜帶型短路接地應(yīng)該選擇能夠承受最大的吊電氣短路電壓、額定短路電壓值不得小于最大故障電壓的電，當(dāng)沒有刪除暫停處重合，也應(yīng)該考慮二次短路電壓在短路電壓沖擊的影響短路接地額定短路電壓值。
防雷接地 :光伏電站由于占地面積相對(duì)較大，周圍地勢(shì)多相對(duì)平緩且廠區(qū)內(nèi)無高大建筑，其防雷措施主要為： （1）加設(shè)避雷針以防止直擊雷并滿足保護(hù)半徑，高度多在20-35米。但為了保證光伏電池組件的運(yùn)行安全和效率，應(yīng)避免對(duì)組件造成遮擋陰影。 （2）光伏組件支架可靠接地。 （3）匯流箱進(jìn)出端口處加設(shè)避雷器。