熔斷器
熔斷(duan)器(qi)，俗稱“保(bao)險絲”，在(zai)規定(ding)(ding)的電(dian)(dian)(dian)(dian)壓條件(jian)(jian)下（電(dian)(dian)(dian)(dian)壓、時間(jian)常數(shu)或功率(lv)因(yin)素），線路電(dian)(dian)(dian)(dian)流(liu)(liu)通(tong)過熔體(ti)，利用(yong)電(dian)(dian)(dian)(dian)流(liu)(liu)熱效應，當熱量累積到一定(ding)(ding)程度(du)時，熔體(ti)的特殊部位（狹(xia)徑）在(zai)規定(ding)(ding)的時間(jian)里熔化、斷(duan)開并熄滅(mie)電(dian)(dian)(dian)(dian)弧(hu)，從而安(an)全分斷(duan)故障電(dian)(dian)(dian)(dian)流(liu)(liu)的被動保(bao)護器(qi)件(jian)(jian)。熔斷(duan)器(qi)廣泛應用(yong)于高、低壓配(pei)電(dian)(dian)(dian)(dian)系統(tong)和控制系統(tong)以及用(yong)電(dian)(dian)(dian)(dian)設備中，作為短(duan)路和過電(dian)(dian)(dian)(dian)流(liu)(liu)的保(bao)護器(qi)，是應用(yong)最普遍也最重(zhong)要的保(bao)護器(qi)件(jian)(jian)之一，主要應用(yong)于電(dian)(dian)(dian)(dian)力、交(jiao)通(tong)、通(tong)信、電(dian)(dian)(dian)(dian)子(zi)等領域。
