在zai汽qi車che保bao險xian絲si座zuo的de運yun用yong管guan理li過guo程cheng中zhong，汽qi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波bo動dong而er計ji劃hua的de過guo載zai。當dang汽qi車che保bao險xian絲si座zuo中zhong的de電dian路lu設she計ji呈cheng現xian一yi個ge較jiao大da過guo載zai電dian流liu時shi
，汽qi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阻zu攔lan過guo載zai電dian流liu。汽qi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堵截電路，然後達到避免因過電流而損壞電路。  

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

baoxiansizuo，jiqicherepingheng，jiangzhangliangwenduhehengkuazhenggebaoxiansishangdedianyajiangwendingdianya，jiangjuyoudianluzaibidingchengdushangyouyixieyingxiang。yiner，meiguibuxuyaoqingxidedianyajiangdeguize。baoxiansizuocheguodianliuzhuyaoshizhidangqiandangzaidianluzhonghuodongdedianliubizhengchangyunxinggao。ruguoguodianliubunengbeizunao，dianluzhongdeqitadianziyuanjiankenengbeisunhuai。  

一般保險絲座由三個重要部分組成：  

yishironghuabufen

，tashirongduanqidezhongxin
，zairongduanshijuyoudusaidianliudexiaoguo。xiangtongleixinghexiangtongbiaozhunrongduanqiderongtiyingyoujuyouxiangtongjihechicundexiangtongziliaozhicheng，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效xiao果guo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管guan理li設she備bei和he使shi用yong。它ta有you必bi要yao發fa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，在運用這個過程中咱們不應導致開裂、變形
、燃燒和短路。  

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頭tou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已yi經jing熔rong化hua(熔化)甚shen至zhi蒸zheng發fa，但dan電dian流liu沒mei有you被bei堵du塞sai。原yuan因yin是shi當dang熔rong斷duan器qi熔rong斷duan時shi，在zai電dian壓ya和he電dian流liu的de效xiao果guo下xia
，熔rong斷duan器qi的de兩liang個ge電dian極ji之zhi間jian發fa生sheng電dian弧hu。這zhe種zhong滅mie弧hu設she備bei有you必bi要yao具ju有you較jiao強qiang的de絕jue緣yuan性xing和he傑jie出chu的de導dao熱re性xing

，並bing帶dai負fu電dian。石shi英ying砂sha是shi常chang用yong的de滅mie弧hu資zi料liao。