Izici zama-fuse

Izici eziyinhloko zefusi

1) Ngemva kokuba iphutha seliqhumile, i-fuse kumele ishintshwe.

2) Umsebenzi wokuvikela uwodwa, unesici esisodwa kuphela sesikhathi esiphambeneyo, esisetshenziselwa ukuvikela ukugcwala ngokweqile, i-short circuit kanye ne-ground fault.

3) Uma kwenzeka i-fuse yesigaba esisodwa, injini yesigaba sesithathu izobangela imiphumela emibi yokusebenza kwesigaba sesibili. Vele, i-fuse enesignali ye-alamu ingasetshenziswa ukuvala leso simo, futhi i-fuse yesigaba esisodwa inganqamula isigaba sesithathu.

4) Isilawuli kude asikwazi ukubonwa, futhi sidinga ukuhlanganiswa neswishi yommese kagesi kanye neswishi.

Izici ze-Fuse

Isenzo sefusi sibonakala ngokuncibilika kokuncibilika. Ifusi inesici esisobala kakhulu, okungukuthi, isici se-ampere-second. Ngokuncibilika, izici zayo zamanje zokusebenza kanye nesikhathi sokusebenza ziyizimpawu ze-ampere-second zefusi, ezibizwa nangokuthi izici zokulibaziseka kwesikhathi eziphambene, okungukuthi: lapho umsinga wokulayisha ngokweqile umncane, isikhathi sokuhlanganisa side; lapho umsinga wokulayisha ngokweqile umningi, isikhathi sokuhlanganisa sifushane.

Ukuze siqonde izici ze-ampere-second, singabona emthethweni kaJoule ukuthi kusekethe yochungechunge, inani le-R le-fuse alishintshile ngokuyisisekelo, futhi inani lama-calorific lilingana nesikwele somsinga u-I, futhi lilingana nesikhathi sokushisa u-T, okungukuthi: lapho umsinga umkhulu, isikhathi esidingekayo ukuze ukuncibilika kuqhume sifushane. Uma umsinga uncane, isikhathi esidingekayo ukuze ukuncibilika kuqhume sifushane, futhi noma izinga lokuqongelela ukushisa lingaphansi kwesilinganiso sokusabalala kokushisa, izinga lokushisa le-fuse ngeke likhuphukele endaweni yokuncibilika, futhi i-fuse ngeke iqhume ngisho. Ngakho-ke, ngaphakathi kobubanzi obuthile bomsinga wokulayisha ngokweqile, lapho umsinga ubuyela esimweni esijwayelekile, i-fuse ngeke iqhume futhi ingaqhubeka nokusetshenziswa.

Ngakho-ke, ukuncibilika ngakunye kunomsinga wokuncibilika omncane. Ngokuhambisana namazinga okushisa ahlukene, umsinga wokuncibilika omncane nawo uhlukile. Nakuba umsinga uthintwa yindawo yangaphandle, ungashaywa indiva ezisetshenziswayo. Ngokuvamile, isilinganiso somsinga wokuncibilika omncane wokuncibilika komsinga olinganiselwe nomsinga olinganiselwe wokuncibilika ngumsinga wokuncibilika omncane. Umsinga wokuncibilika komsinga osetshenziswa kakhulu mkhulu kuno-1.25, okusho ukuthi, ukuncibilika komsinga olinganiselwe ongu-10 amps ngeke kuhlangane uma umsinga ungaphansi kuka-12.5 amps. .

Kungabonakala kulokhu ukuthi ukusebenza kokuvikela i-fuse nge-short-circuit kuhle kakhulu, futhi ukusebenza kokuvikela i-overload kuyinto evamile. Uma kudingeka ngempela ukuyisebenzisa ekuvikeleni i-overload, kuyadingeka ukufanisa ngokucophelela i-line overload current ne-rated current ye-fuse. Isibonelo: i-8-amp melt isetshenziswa kwi-10-amp circuit yokuvikela i-short-circuit kanye nokuvikela i-overload, kodwa izici zokuvikela i-overload ngalesi sikhathi azilungile.