延時保險絲，它的(de)(de)(de)(de)(de)(de)延(yan)時(shi)(shi)特(te)性表現(xian)在電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)出現(xian)非故障(zhang)脈(mo)沖(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)時(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)持完(wan)好而(er)能(neng)對長(chang)時(shi)(shi)間(jian)(jian)的(de)(de)(de)(de)(de)(de)提(ti)供(gong)過(guo)(guo)(guo)(guo)(guo)載保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)護和(he)過(guo)(guo)(guo)(guo)(guo)流(liu)(liu)(liu)(liu)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)護。有些(xie)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)在開關瞬(shun)間(jian)(jian)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)大(da)于幾倍正常工作電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，盡管這種(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)峰(feng)值(zhi)很(hen)高，但(dan)是(shi)它出現(xian)的(de)(de)(de)(de)(de)(de)時(shi)(shi)間(jian)(jian)很(hen)短(duan)，我們稱它為脈(mo)沖(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)也有稱它為沖(chong)(chong)擊電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)或(huo)(huo)叫它為浪(lang)涌電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)。普(pu)通(tong)的(de)(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)是(shi)承受不(bu)(bu)了這種(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)(de)(de)(de)，這樣(yang)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中若(ruo)(ruo)使用(yong)的(de)(de)(de)(de)(de)(de)是(shi)普(pu)通(tong)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)恐怕就無法正常開機了，若(ruo)(ruo)使用(yong)更大(da)規格的(de)(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)，那么當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)過(guo)(guo)(guo)(guo)(guo)載時(shi)(shi)又得(de)不(bu)(bu)到保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)護。延(yan)時(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)的(de)(de)(de)(de)(de)(de)熔體經(jing)特(te)殊加工而(er)成，它具有吸(xi)(xi)收(shou)能(neng)量(liang)的(de)(de)(de)(de)(de)(de)作用(yong)，調(diao)整能(neng)量(liang)吸(xi)(xi)收(shou)量(liang)就能(neng)使它即可以(yi)抗住沖(chong)(chong)擊電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)又能(neng)對過(guo)(guo)(guo)(guo)(guo)載提(ti)供(gong)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)護，當(dang)同樣(yang)過(guo)(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)負載條件下，延(yan)時(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)的(de)(de)(de)(de)(de)(de)動(dong)作速(su)度(du)(du)要(yao)比快熔斷保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)來得(de)慢(man)一(yi)些(xie)，但(dan)這并(bing)不(bu)(bu)是(shi)延(yan)時(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)的(de)(de)(de)(de)(de)(de)反(fan)(fan)應(ying)速(su)度(du)(du)慢(man)，而(er)是(shi)延(yan)時(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)熔斷需要(yao)的(de)(de)(de)(de)(de)(de)能(neng)量(liang)更大(da)，也可以(yi)說它不(bu)(bu)光是(shi)具有對過(guo)(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)(de)(de)(de)反(fan)(fan)應(ying)，還具有對過(guo)(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)類別(bie)或(huo)(huo)能(neng)量(liang)大(da)小的(de)(de)(de)(de)(de)(de)判(pan)別(bie)能(neng)力。一(yi)般來說過(guo)(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)可分為兩大(da)類：浪(lang)涌和(he)故障(zhang)。浪(lang)涌過(guo)(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)大(da)都是(shi)由于電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)開關時(shi)(shi)的(de)(de)(de)(de)(de)(de)充放電(dian)(dian)(dian)(dian)(dian)(dian)或(huo)(huo)周圍電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)(de)(de)影響所(suo)引起的(de)(de)(de)(de)(de)(de)，脈(mo)沖(chong)(chong)峰(feng)值(zhi)大(da)而(er)持續時(shi)(shi)間(jian)(jian)短(duan)，所(suo)釋(shi)放的(de)(de)(de)(de)(de)(de)能(neng)量(liang)往(wang)(wang)往(wang)(wang)不(bu)(bu)大(da)，延(yan)時(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)可以(yi)承受這樣(yang)的(de)(de)(de)(de)(de)(de)過(guo)(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)沖(chong)(chong)擊而(er)不(bu)(bu)導致熔斷動(dong)作；而(er)故障(zhang)過(guo)(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)則是(shi)持續性的(de)(de)(de)(de)(de)(de)，即使峰(feng)值(zhi)不(bu)(bu)一(yi)定很(hen)高其能(neng)量(liang)也要(yao)大(da)大(da)超過(guo)(guo)(guo)(guo)(guo)浪(lang)涌過(guo)(guo)(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，延(yan)時(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)照例(li)是(shi)會迅速(su)反(fan)(fan)應(ying)而(er)熔斷動(dong)作的(de)(de)(de)(de)(de)(de)，所(suo)以(yi)從這個(ge)角度(du)(du)來看，延(yan)時(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)絲(si)(si)(si)(si)的(de)(de)(de)(de)(de)(de)動(dong)作速(su)度(du)(du)略慢(man)不(bu)(bu)僅不(bu)(bu)影響它的(de)(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)護功(gong)能(neng)，反(fan)(fan)而(er)增(zeng)強了延(yan)時(shi)(shi)的(de)(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)護功(gong)能(neng)，避免了誤(wu)動(dong)作的(de)(de)(de)(de)(de)(de)機會，可以(yi)在更廣泛的(de)(de)(de)(de)(de)(de)場合應(ying)用(yong)，對多種(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)起到保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)護作用(yong)。
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