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天聯(lián)牌光伏板黃綠BVR2.5接地線
雙色接地線 黃綠接地線就是直接連接地球的線,也可以稱為安全回路線,危險(xiǎn)時(shí)它就把高壓直接轉(zhuǎn)嫁給地球,算是一根生命線。
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(wèn)題并不重視,但隨著太陽(yáng)能電池板功率和電站系統(tǒng)容量的增大,近年來(lái)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(guò)程中可能會(huì)遇到的接地施工問(wèn)題并淺析接地技術(shù)。
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。
攜帶型短路接地線檢驗(yàn)周期為每五年一次,檢驗(yàn)項(xiàng)目同出廠檢驗(yàn)。經(jīng)試驗(yàn)合格的攜帶型短路接地線在經(jīng)受短路后,應(yīng)根據(jù)經(jīng)受短路電流大小和外觀檢驗(yàn)判斷,一般應(yīng)予報(bào)廢。
黃綠接地線簡(jiǎn)介:電器中,黃綠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。(1)高壓接地線作用: 高壓接地線是用于線路和變電施工,為防止臨近帶電體產(chǎn)生靜電感應(yīng)觸電或誤合閘時(shí)保證安全之用。(2)高壓接地線結(jié)構(gòu): 攜帶型高壓接地線由絕緣操作桿、導(dǎo)線夾、短路線、接地線、接地端子、匯流夾、接地夾。(3)高壓接地線制作工藝:制作工藝優(yōu)良-- 導(dǎo)線夾、接地夾是采用優(yōu)質(zhì)鋁合金壓鑄成形;操作棒采用環(huán)氧樹脂彩色管,絕緣性能好,強(qiáng)度高、重量輕、色彩鮮明、外表光滑;接地軟銅線采用多股優(yōu)質(zhì)軟銅線絞合而成,并外覆柔軟、耐高溫的透明絕緣護(hù)層,可以防止使用中對(duì)接地銅線的磨損,銅線達(dá)到疲勞度測(cè)試需求,確保作業(yè)人員在操作中的安全。(4)接地線規(guī)格:按部頒規(guī)定,接地線必須是 25mm 2 以上裸銅軟線制成。
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] 。
ir support of it than they were; and both the Queen and Sus were for ever trying to get at Philip’s real desires in the matter. With the papers now before us, we see that if the Emperor was to be induced to give way on the question of religion, and England was to remain Protestant, the marriage would injure rather than benefit Philip’s plans; whilst a thoroughly Catholic match, by which Elizabeth would he submitted to the Pope, would he cut the ground112 from under her feet and made her the humble servant of Spain. This she knew better than any one, and however much
按不同電壓等級(jí)選用對(duì)應(yīng)規(guī)格的接地線。
嚴(yán)禁不用線夾而用纏繞的方法進(jìn)行接地短路。
通過(guò)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(guò)程中接地系統(tǒng)常見的施工問(wèn)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(guò)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)。
公司配備了高壓局放檢測(cè)裝備,拉力試驗(yàn)機(jī),低溫彎曲試驗(yàn)機(jī),燃燒試驗(yàn)儀,絕緣電阻測(cè)試儀,電子分析天平,故障定位儀等全套檢測(cè)設(shè)備,對(duì)出廠產(chǎn)品嚴(yán)格測(cè)試,我公司生產(chǎn)的光伏接地線,產(chǎn)品型號(hào)齊全,質(zhì)量保證!采用BVR黃綠雙色線制作,發(fā)貨快 價(jià)格優(yōu),本廠接地線全部為國(guó)標(biāo)線,默認(rèn)孔徑5MM,可定制任意孔徑和長(zhǎng)度,請(qǐng)用戶放心訂購(gòu).我廠自己生產(chǎn)的BVR黃綠雙色線,全部按GB生產(chǎn)。
that at one juncture he had sed her life, and it is highly probable that the Princess was released from the Tower in May, 1554 on the recommendation of Renard, made in the name of the coming bridegroom of the Queen. De Noailles writes that she was to go to Richmond from the Tower, and was there to receive two gentlemen from the Emperor who were to sound her as to a marriage with Emmanuel of Soy. If she refused the match she was to be taken to Woodstock under guard, again a prisoner. De Noailles knew that the best way of preventing such a match was to arouse the Queen’s18 suspicion that Elizabeth was plotting with the French. So with devilish ingenuity he sent a man with a present of apples to the Princess to meet her on her arrival at Richmond
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(yīng)該工作在和諧與懸點(diǎn)系統(tǒng),額定電壓,懸掛應(yīng)保證員工當(dāng)短路接地,接地和電氣設(shè)備必要的安全距離。在前面的架接地工作結(jié)束后的員工應(yīng)保持接地導(dǎo)體保持安全距離。使用類型與短路接地、經(jīng)驗(yàn)確認(rèn)已經(jīng)停電、設(shè)備再?zèng)]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(hù):類型與短路接地應(yīng)在空氣流通、干燥的環(huán)境中特殊的沉積位置,應(yīng)仔細(xì)檢查每次使用之前。發(fā)現(xiàn)夾子開裂、松散連接、護(hù)套損壞、銅線裸露應(yīng)禁止使用
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