制造(zao)電(dian)(dian)器時，要到達(da)電(dian)(dian)器的(de)金屬(shu)外殼，必須(xu)在(zai)電(dian)(dian)器的(de)所有使用過程中不帶電(dian)(dian)，即使生(sheng)產成本很高，也很難做到。為防止電(dian)(dian)氣金屬(shu)外殼帶電(dian)(dian)傷人，在(zai)技能上可選(xuan)擇以下(xia)方法：

??維護(hu)接(jie)(jie)(jie)(jie)地(di)或零維護(hu)接(jie)(jie)(jie)(jie)地(di)??電(dian)(dian)(dian)器(qi)(qi)(qi)的(de)維護(hu)接(jie)(jie)(jie)(jie)地(di)是將在缺條件下可能帶電(dian)(dian)(dian)的(de)金屬外(wai)(wai)殼(ke)與(yu)(yu)接(jie)(jie)(jie)(jie)地(di)體牢固連(lian)接(jie)(jie)(jie)(jie)（接(jie)(jie)(jie)(jie)地(di)體設(she)備可參考相關書(shu)籍）。電(dian)(dian)(dian)氣設(she)備保(bao)(bao)養接(jie)(jie)(jie)(jie)地(di)后，即(ji)使外(wai)(wai)殼(ke)因絕緣不良而充電(dian)(dian)(dian)，使用電(dian)(dian)(dian)器(qi)(qi)(qi)的(de)人(ren)(ren)(ren)(ren)員(yuan)接(jie)(jie)(jie)(jie)觸外(wai)(wai)殼(ke)時，與(yu)(yu)接(jie)(jie)(jie)(jie)地(di)電(dian)(dian)(dian)阻(zu)(zu)并聯(lian)，人(ren)(ren)(ren)(ren)體電(dian)(dian)(dian)阻(zu)(zu)遠大于接(jie)(jie)(jie)(jie)地(di)電(dian)(dian)(dian)阻(zu)(zu)，因此流過(guo)人(ren)(ren)(ren)(ren)體的(de)電(dian)(dian)(dian)流很(hen)小，保(bao)(bao)證了人(ren)(ren)(ren)(ren)體的(de)安全(quan)。如果電(dian)(dian)(dian)器(qi)(qi)(qi)的(de)絕緣在選擇(ze)維護(hu)接(jie)(jie)(jie)(jie)地(di)后被擊穿，此時短路電(dian)(dian)(dian)流很(hen)大，微(wei)電(dian)(dian)(dian)機殼(ke)價格，只(zhi)需(xu)合理選擇(ze)安全(quan)設(she)備，短路電(dian)(dian)(dian)流就會使安全(quan)設(she)備移動，堵塞電(dian)(dian)(dian)器(qi)(qi)(qi)的(de)電(dian)(dian)(dian)源。確保(bao)(bao)使用電(dian)(dian)(dian)器(qi)(qi)(qi)人(ren)(ren)(ren)(ren)員(yuan)的(de)安全(quan)。

試驗燈(deng)(deng)差異法。??將電(dian)器的金屬(shu)(shu)外殼與通常的白(bai)熾(chi)燈(deng)(deng)泡一極連接(jie)，微電(dian)機殼尺(chi)寸(cun)，燈(deng)(deng)泡的另一極與地球或(huo)電(dian)源(yuan)的零線連接(jie)：如果(guo)燈(deng)(deng)泡不(bu)亮，通常屬(shu)(shu)于正常電(dian)源(yuan)；如果(guo)燈(deng)(deng)泡與220V通信(xin)電(dian)源(yuan)的亮度相同，則電(dian)器內部絕緣(yuan)突(tu)破；如果(guo)燈(deng)(deng)泡比連接(jie)到220V通信(xin)電(dian)源(yuan)時(shi)更(geng)暗(an)，則電(dian)器絕緣(yuan)不(bu)良。后兩(liang)種帶電(dian)屬(shu)(shu)于電(dian)器的異常帶電(dian)。

萬用表(biao)差異(yi)法:用萬用表(biao)電(dian)(dian)(dian)阻檔(dang)(R×10K檔(dang))測量電(dian)(dian)(dian)氣外殼(ke)與電(dian)(dian)(dian)源引線之間的電(dian)(dian)(dian)阻:如(ru)果(guo)電(dian)(dian)(dian)阻值為零，微電(dian)(dian)(dian)機(ji)機(ji)殼(ke)廠，電(dian)(dian)(dian)氣內部絕緣已被擊穿；如(ru)果(guo)電(dian)(dian)(dian)阻值小于(yu)2MΩ，電(dian)(dian)(dian)氣內部絕緣泄漏(lou)，電(dian)(dian)(dian)阻值越小，泄漏(lou)越嚴重；如(ru)果(guo)電(dian)(dian)(dian)阻值大或大于(yu)2M，則電(dian)(dian)(dian)器正常充電(dian)(dian)(dian)。

兆歐表差異法：用500V兆歐表測量帶電部件對外殼的絕緣電阻。如果電阻為零，則表明泄漏是由電氣內部絕緣擊穿引起的；如果電阻大于2M，金山微電機機殼，則表明外殼帶電是由感應電壓引起的。如果電阻小于2MΩ，但不為零，則表明帶電是由電氣內部絕緣泄漏引起的。

玻璃纖維

??這種材料有優缺點。玻璃(li)(li)纖(xian)維(wei)不受銹蝕(shi)或腐(fu)蝕(shi)性元素(su)的(de)(de)氧化(hua)，并(bing)具(ju)有很高(gao)的(de)(de)耐(nai)化(hua)學(xue)性。但是，玻璃(li)(li)纖(xian)維(wei)外殼非常堅硬，對工具(ju)具(ju)有磨蝕(shi)性，因此很難成型(xing)和后期(qi)修改(gai)。玻璃(li)(li)纖(xian)維(wei)還會在陽(yang)光(guang)下迅速降解，并(bing)長時間暴露于熱環境中(zhong)，因此玻璃(li)(li)纖(xian)維(wei)的(de)(de)應用非常特殊。

選擇材料

??如(ru)果說外殼材(cai)料中(zhong)重要的因素是環(huan)境，那么(me)第(di)二(er)個重要的因素就是來源——特別是在(zai)整個面板(ban)時，而不僅僅是購買(mai)零件。的控制面板(ban)制造商將熟悉這三種(zhong)材(cai)料，并了解每種(zhong)材(cai)料的理想應用(yong)。

??如果您需要訂購電器外殼，請提供您的要求和聯系方式，然后我們將在一天內與您聯系。我們保證您的所有信息都不會泄露給任何人。到的任何問題。