項目名稱：防雷裝置檢測
       項目地點：蔡家污水處理項目廠區
       項目內容：
       由于(yu)高(gao)(gao)(gao)壓雷(lei)(lei)電(dian)(dian)(dian)(dian)(dian)脈(mo)沖是雷(lei)(lei)害(hai)中(zhong)(zhong)年損(sun)害(hai)設(she)備(bei)多(duo)的(de)(de)，所以(yi)對高(gao)(gao)(gao)壓雷(lei)(lei)電(dian)(dian)(dian)(dian)(dian)引(yin)(yin)人的(de)(de)設(she)備(bei)必須予以(yi)足夠重視，在工程上往(wang)往(wang)要(yao)根據設(she)備(bei)的(de)(de)重要(yao)性和(he)其對高(gao)(gao)(gao)電(dian)(dian)(dian)(dian)(dian)壓的(de)(de)耐(nai)受(shou)能(neng)(neng)力采(cai)(cai)用(yong)一(yi)(yi)級(ji)(ji)或(huo)多(duo)級(ji)(ji)設(she)防(fang)。其中(zhong)(zhong)一(yi)(yi)級(ji)(ji)設(she)防(fang)，往(wang)往(wang)是把高(gao)(gao)(gao)電(dian)(dian)(dian)(dian)(dian)壓雷(lei)(lei)電(dian)(dian)(dian)(dian)(dian)脈(mo)沖的(de)(de)幅值(zhi)降低，如(ru)果電(dian)(dian)(dian)(dian)(dian)源輸(shu)入是明線輸(shu)入，應把入室前(qian)三根電(dian)(dian)(dian)(dian)(dian)桿的(de)(de)線碼(ma)鐵腳用(yong)金屬(shu)線引(yin)(yin)下接(jie)(jie)(jie)地，以(yi)便降低閃擊電(dian)(dian)(dian)(dian)(dian)壓。并(bing)且進(jin)房屋前(qian)后(hou)一(yi)(yi)根電(dian)(dian)(dian)(dian)(dian)桿的(de)(de)零線(或(huo)接(jie)(jie)(jie)地系統的(de)(de)地線)重復接(jie)(jie)(jie)地，接(jie)(jie)(jie)地電(dian)(dian)(dian)(dian)(dian)限不應大于(yu)10歐姆(mu)(見圖1)。并(bing)在相線與(yu)地之間留(liu)有2 mm的(de)(de)空氣(qi)間隙，把從(cong)相線引(yin)(yin)來(lai)(lai)的(de)(de)過電(dian)(dian)(dian)(dian)(dian)壓降下來(lai)(lai)，可能(neng)(neng)的(de)(de)悄況下，進(jin)戶(hu)線應盡量采(cai)(cai)用(yong)有金屬(shu)屏蔽層的(de)(de)電(dian)(dian)(dian)(dian)(dian)纜直接(jie)(jie)(jie)埋(mai)地或(huo)穿金屬(shu)管進(jin)線。
       在雷(lei)電(dian)高發區，房(fang)尾(wei)前為開闊地(di)，或房(fang)子內有精(jing)密電(dian)子設備(bei)和電(dian)子計算機的(de)(de)情況更應該是(shi)這樣.并且(qie)埋地(di)的(de)(de)電(dian)纜其絕對長(chang)度(du)不應小于15m。并要(yao)(yao)求從架(jia)空線轉電(dian)纜的(de)(de)進(jin)線端(duan)(duan)，和電(dian)纜入屋(wu)的(de)(de)輸(shu)出端(duan)(duan)，都接(jie)避雷(lei)器。避雷(lei)器的(de)(de)接(jie)地(di)端(duan)(duan)、電(dian)纜的(de)(de)金屬(shu)屏(ping)蔽層(ceng)、鋼(gang)管都必須接(jie)到防(fang)雷(lei)電(dian)感應的(de)(de)接(jie)地(di)裝置上。按供電(dian)部門要(yao)(yao)求.供電(dian)零(ling)線進(jin)人鋼(gang)筋(jin)水(shui)泥大樓后(hou)，仍必須與從大樓、梁、柱內引出的(de)(de)一(yi)條主鋼(gang)筋(jin)作電(dian)氣連接(jie)，無鋼(gang)筋(jin)連接(jie)的(de)(de)建(jian)筑物應做接(jie)地(di)極，把零(ling)線重(zhong)復接(jie)地(di)。

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