在zai轎jiao車che保bao險xian絲si座zuo的de運yun用yong辦ban理li過guo程cheng中zhong，轎jiao車che保bao險xian絲si座zuo的de保bao險xian絲si在zai必bi定ding程cheng度du上shang能neng夠gou進jin步bu承cheng受shou能neng力li因yin為wei其qi電dian源yuan或huo外wai部bu的de攪jiao擾rao電dian流liu發fa生sheng動dong搖yao而er方fang案an的de過guo載zai。當dang轎jiao車che保bao險xian絲si座zuo中zhong的de電dian路lu設she計ji出chu現xian一yi個ge較jiao大da過guo載zai電dian流liu時shi
，轎jiao車che保bao險xian絲si座zuo的de保bao險xian絲si應ying在zai固gu定ding時shi間jian內nei攔lan截jie過guo載zai電dian流liu。轎jiao車che保bao險xian絲si座zuo能neng夠gou在zai必bi定ding程cheng度du上shang需xu要yao保bao持chi控kong製zhi電dian路lu中zhong其qi他ta電dian子zi設she備bei元yuan件jian的de安an全quan性xing。當dang電路結構發生各種短路並顯現大電流時，保險絲能夠有用安全地切斷電路，從而到達防止因過電流而損壞電路。  

轎車保險絲架中的熔斷器能夠在等於或小於其額定電壓的電壓下運用，但通常不能用於電路電壓大於熔斷器額定電壓的電路。  

保bao險xian絲si座zuo，即ji轎jiao車che熱re平ping衡heng

，將jiang測ce量liang溫wen度du和he橫heng跨kua整zheng個ge保bao險xian絲si上shang的de電dian壓ya降jiang穩wen定ding電dian壓ya，將jiang具ju有you電dian路lu在zai必bi定ding程cheng度du上shang有you一yi些xie影ying響xiang。因yin此ci，美mei規gui不bu需xu要yao清qing晰xi的de電dian壓ya降jiang的de規gui則ze。保bao險xian絲si座zuo車che過guo電dian流liu主zhu要yao是shi指zhi當dang時shi當dang在zai電dian路lu中zhong流liu動dong的de電dian流liu比bi正zheng常chang運yun行xing高gao。假jia如ru過guo電dian流liu不bu能neng被bei阻zu止zhi，電dian路lu中zhong的de其qi它ta電dian子zi元yuan件jian可ke能neng被bei損sun壞huai。  

一般保險絲座由三個重要部分組成：  

yishironghuabufen
，tashirongduanqidezhongxin，zairongduanshijuyoudusaidianliudezuoyong。xiangtongleixinghexiangtongbiaozhunrongduanqiderongtiyingyoujuyouxiangtongjixuchicundexiangtongcailiaozhicheng，qidianzuzhijinkenengxiao，qieyizhi，zhongyaodeshijuyouxiangtongderongduanqitexing。  

二er
，通tong常chang存cun在zai兩liang個ge電dian極ji元yuan件jian，它ta們men連lian接jie在zai熔rong體ti和he電dian路lu之zhi間jian的de重zhong要yao組zu件jian。他ta們men有you必bi要yao有you傑jie出chu的de導dao電dian性xing
，並bing且qie不bu應ying該gai發fa生sheng觸chu摸mo設she備bei阻zu力li顯xian著zhu性xing。  

三
、是(shi)支(zhi)撐(cheng)一(yi)個(ge)部(bu)分(fen)。熔(rong)融(rong)物(wu)通(tong)常(chang)是(shi)細(xi)而(er)軟(ruan)的(de)。支(zhi)撐(cheng)的(de)作(zuo)用(yong)是(shi)固(gu)定(ding)熔(rong)體(ti)並(bing)使(shi)三(san)個(ge)組(zu)成(cheng)部(bu)分(fen)進(jin)行(xing)剛(gang)性(xing)。便(bian)於(yu)辦(ban)理(li)設(she)備(bei)和(he)運(yun)用(yong)。它(ta)有(you)必(bi)要(yao)開(kai)展(zhan)具(ju)有(you)一(yi)種(zhong)傑(jie)出(chu)的(de)機(ji)械(xie)設(she)計(ji)強(qiang)度(du)、絕緣性、耐熱性和阻燃性，在運用這個過程中我們不應導致開裂
、變形、焚燒和短路。  

用(yong)於(yu)電(dian)力(li)電(dian)路(lu)和(he)大(da)功(gong)率(lv)設(she)備(bei)的(de)熔(rong)斷(duan)器(qi)不(bu)隻(zhi)有(you)三(san)部(bu)分(fen)常(chang)見(jian)的(de)熔(rong)斷(duan)器(qi)，並(bing)且(qie)還(hai)有(you)滅(mie)弧(hu)設(she)備(bei)，因(yin)為(wei)這(zhe)種(zhong)熔(rong)斷(duan)器(qi)所(suo)維(wei)護(hu)的(de)電(dian)路(lu)不(bu)隻(zhi)有(you)較(jiao)大(da)的(de)電(dian)流(liu)，並(bing)且(qie)在(zai)熔(rong)體(ti)熔(rong)化(hua)時(shi)兩(liang)端(duan)都(dou)有(you)較(jiao)高(gao)的(de)電(dian)壓(ya)，往(wang)往(wang)表(biao)明(ming)熔(rong)體(ti)現(xian)已(yi)熔(rong)化(hua)(熔化)naizhizhengfa，dandianliumeiyoubeidusai。yuanyinshidangrongduanqirongduanshi
，zaidianyahedianliudezuoyongxia

，rongduanqidelianggedianjizhijianfashengdianhu。zhezhongmiehushebeiyoubiyaojuyoujiaoqiangdejueyuanxinghejiechudedaorexing，bingdaifudian。shiyingshashichangyongdemiehucailiao。