電(dian)子汽(qi)車衡(heng)(heng)系(xi)統防雷(lei)是從(cong)系(xi)統的(de)(de)觀點出(chu)發(fa)，本著(zhu)“綜合(he)防護(hu)(hu)、系(xi)統防護(hu)(hu)、逐級(ji)限壓”的(de)(de)全(quan)面(mian)防護(hu)(hu)理念，依據現代(dai)防雷(lei)技(ji)術設計(ji)規范(fan)，結合(he)電(dian)子汽(qi)車衡(heng)(heng)系(xi)統的(de)(de)結構特點，從(cong)傳(chuan)感器(qi)、秤體到(dao)稱重儀表統一進行(xing)防雷(lei)設計(ji)，從(cong)而做到(dao)：方案優(you)化、技(ji)術合(he)理、經濟有(you)效、安全(quan)可(ke)靠，把雷(lei)電(dian)災(zai)害降低到(dao)最(zui)低的(de)(de)水平。在雷(lei)雨(yu)天不用(yong)切(qie)斷電(dian)源，照常(chang)使用(yong)電(dian)子汽(qi)車衡(heng)(heng)，使得企業稱重計(ji)量不受雷(lei)擊的(de)(de)影響，該設計(ji)具體包(bao)括以下三個部分。

　　(1) 對傳感器、二次儀表等電子汽車衡整體的(de)各個部(bu)分，做(zuo)特殊(shu)的(de)等電位(wei)防雷保護。

　　等電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)保(bao)護(hu)(hu)是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子汽車衡(heng)(heng)(heng)系統(tong)(tong)(tong)雷電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)(hu)系統(tong)(tong)(tong)的(de)(de)(de)(de)(de)核心和(he)(he)根本。雷擊(ji)時(shi)，在強大的(de)(de)(de)(de)(de)雷電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流泄入大地的(de)(de)(de)(de)(de)瞬間，由于接地線存在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻和(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)感，因此(ci)整體(ti)衡(heng)(heng)(heng)器(qi)系統(tong)(tong)(tong) 對地可產生幾萬甚(shen)至(zhi)幾十萬伏的(de)(de)(de)(de)(de)高(gao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)，此(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子汽車衡(heng)(heng)(heng)的(de)(de)(de)(de)(de)各(ge)個(ge)部分(fen)甚(shen)至(zhi)整體(ti)系統(tong)(tong)(tong)都是(shi)毀滅性的(de)(de)(de)(de)(de)打擊(ji)。本系統(tong)(tong)(tong)對整體(ti)衡(heng)(heng)(heng)器(qi)系統(tong)(tong)(tong)的(de)(de)(de)(de)(de)各(ge)部位(wei)(wei)(傳感器(qi)、儀表和(he)(he)計算機)的(de)(de)(de)(de)(de)各(ge)種接口均做相應的(de)(de)(de)(de)(de)等電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)保(bao)護(hu)(hu)，使整體(ti)衡(heng)(heng)(heng)器(qi)系統(tong)(tong)(tong)的(de)(de)(de)(de)(de)基(ji)礎電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)隨地線電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)的(de)(de)(de)(de)(de)變化(hua)而變化(hua)，實質上(shang)也(ye)就是(shi)水漲船高(gao)之意，這就避免(mian)了雷擊(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流產生的(de)(de)(de)(de)(de)高(gao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子汽車衡(heng)(heng)(heng)造成(cheng)的(de)(de)(de)(de)(de)破壞(huai)。

　　(2) 切斷傳感器彈(dan)性(xing)體與秤(cheng)臺的電氣通道，另(ling)外提供電流的泄(xie)放通道。

　　只(zhi)做等電(dian)(dian)(dian)位保(bao)護(hu)還(huan)不夠(gou)，還(huan)必須切斷傳(chuan)感(gan)器(qi)與秤(cheng)臺的(de)(de)(de)電(dian)(dian)(dian)氣(qi)連接。雷(lei)(lei)擊電(dian)(dian)(dian)流(liu)(liu)可以看做超高頻且(qie)能(neng)量巨大的(de)(de)(de)電(dian)(dian)(dian)流(liu)(liu)，與直流(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)有(you)著本質的(de)(de)(de)區(qu)別，決不能(neng)以直流(liu)(liu)電(dian)(dian)(dian)阻來(lai)計算雷(lei)(lei)擊時(shi)通(tong)過傳(chuan)感(gan)器(qi)彈(dan)性(xing)體(ti)的(de)(de)(de)電(dian)(dian)(dian)流(liu)(liu)。實驗測試表明：雖(sui)然(ran)在傳(chuan)感(gan)器(qi)的(de)(de)(de)兩端加裝多條短路(lu)分流(liu)(liu)帶，但仍不能(neng)有(you)效地(di)保(bao)護(hu)傳(chuan)感(gan)器(qi)。本方案(an)采用(yong)特(te)殊裝置，徹(che)底(di)切斷傳(chuan)感(gan)器(qi)的(de)(de)(de)電(dian)(dian)(dian)流(liu)(liu)通(tong)路(lu)，徹(che)底(di)阻斷雷(lei)(lei)擊電(dian)(dian)(dian)流(liu)(liu)通(tong)過傳(chuan)感(gan)器(qi)彈(dan)性(xing)體(ti)，從(cong)而避免了雷(lei)(lei)擊電(dian)(dian)(dian)流(liu)(liu)產生的(de)(de)(de)電(dian)(dian)(dian)磁場(chang)對傳(chuan)感(gan)器(qi)的(de)(de)(de)破(po)壞(huai)，同(tong)時(shi)保(bao)證(zheng)雷(lei)(lei)擊電(dian)(dian)(dian)流(liu)(liu)通(tong)暢(chang)地(di)泄入大地(di)。

　　(3) 供電系(xi)統(tong)做(zuo)多級(ji)防雷(lei)保護。

　　以(yi)上兩(liang)條措施可以(yi)對(dui)整體衡器系(xi)統具有(you)一定的(de)(de)(de)保護(hu)(hu)功能(neng)(neng)(neng)(neng)，但對(dui)來自電(dian)(dian)(dian)(dian)源的(de)(de)(de)雷擊(ji)浪(lang)涌(yong)則無能(neng)(neng)(neng)(neng)為力。而(er)架空供電(dian)(dian)(dian)(dian)的(de)(de)(de)電(dian)(dian)(dian)(dian)源線極易受(shou)到雷電(dian)(dian)(dian)(dian)襲擊(ji)而(er)產生浪(lang)涌(yong)，通(tong)過電(dian)(dian)(dian)(dian)源，造(zao)成衡器系(xi)統損壞，因此(ci)，電(dian)(dian)(dian)(dian)源系(xi)統更應該加強(qiang)防(fang)護(hu)(hu)。對(dui)此(ci)，本方案(an)采用(yong)多級(ji)防(fang)護(hu)(hu)電(dian)(dian)(dian)(dian)路，只(zhi)有(you)這樣，才能(neng)(neng)(neng)(neng)把較大的(de)(de)(de)各種(zhong)浪(lang)涌(yong)過電(dian)(dian)(dian)(dian)壓削減到電(dian)(dian)(dian)(dian)器設(she)備能(neng)(neng)(neng)(neng)夠承受(shou)的(de)(de)(de)水平(ping)，才能(neng)(neng)(neng)(neng)給設(she)備提供安全有(you)效的(de)(de)(de)保護(hu)(hu)。