INTSHAYELELO YEFUSE YE-VOLTAGE EZIPHEZULU

Iifusi ze-voltage ephezulungokubanzi zisetyenziswa kwiigridi zamandla ezinomthamo omncinci ezinevolthi engaphantsi kwe-35kV. Xa kwenzeka i-overload okanye i-short circuit kwinkqubo, ukunyibilika kuyavuthuzwa ngenxa yokushisa kakhulu, ngaloo ndlela kunqunyulwa umgca kwaye kukhuselwe igridi yamandla kunye nezixhobo zombane. Umgaqo wayo wokusebenza uyafana noweefusi zevolthi esezantsi. Iifusi ziyafana.
Iifusi ze-high-voltage zahlulwe zibe ziintlobo ezimbini: ukukhawulelwa kombane kunye nokuphuma. Intsingiselo yokukhawulelwa kombane kukukhawulelwa kombane we-short-circuit ukuze ufikelele kwixabiso eliphezulu, ngaloo ndlela uphula umgca ngexabiso elithile ngaphambi kwexabiso eliphezulu lombane we-short-circuit, kunye nokunciphisa umonakalo wombane we-short-circuit kumgca nakwizixhobo zombane.

1. Intshayelelo ye-drop fuse
I-insulation pillar idlala indima yokufakela, ukuqinisa kunye nokukhusela, kwaye izinto zenziwe nge-ceramic. I-melting tube idlala indima yokukhusela kunye nokucima i-arc. Umaleko wangaphandle wenziwe ngetyhubhu yephepha le-phenolic okanye ityhubhu yelaphu leglasi ye-epoxy, kwaye umaleko wangaphakathi wenziwe ngezinto ezivelisa igesi ezifana netyhubhu yephepha lesinyithi okanye ityhubhu yephepha le-shellac. Zombini iziphelo zetyhubhu yokunyibilika ziindawo eziphezulu nezisezantsi. I-melt idlula kwityhubhu yokunyibilika, elinye icala liqiniswe kwikhonkco elisezantsi, elinye icala liqiniswe kwiplate yoxinzelelo enokujikeleza i-axis, kwaye iplate yoxinzelelo icinezelwe kwiphepha lesinyithi lentwasahlobo ukwenza ikhonkco eliphezulu. Ityhubhu yokudibanisa iqiniswe phakathi kwenkxaso yesinyithi kunye ne-duckbill. Xa uyifaka, yenza ityhubhu ye-fuse kunye nomgca othe nkqo ube yi-engile ye-30°. Emva kokuba i-melt idityanisiwe, iplate yoxinzelelo ijikeleza ngokwewotshi ijikeleze i-shaft phantsi kwesenzo sentwasahlobo, ikhonkco eliphezulu liphuma kulwimi lwesiciko se-duckbill, kwaye ityhubhu ye-fuse ijikeleza ngokuchasene newotshi ijikeleze i-shaft 3 ngomxhuzulane wayo, ixhonywe phezulu kwinkxaso, kwaye kuthiwa iyawa. Emva kokuba ukunyibilika kuqhunyisiwe kwaye kuveliswe i-arc,
Ubushushu be-arc benza ukuba izinto ezikudonga olungaphakathi lwetyhubhu yokunyibilika zivelise igesi, uxinzelelo olukwityhubhu luyaphakama, igesi ikhutshwa ngaphandle ngesantya esiphezulu, kwaye i-arc ivuthelwa ngobude, kwaye i-arc iyacinywa xa umsinga unqumla i-zero.
Emva kokuba ityhubhu yefuse iwele, susa ityhubhu yefuse nge-insulating hook rod uze uyitshintshe nge-melt entsha. Emva kokuba impazamo isusiwe, tyhala ityhubhu yefuse uye kwindawo yokuvala.
I-fuse ilula ngesakhiwo kwaye ayibizi kakhulu. Ingxaki kukuba umsinga oqhekekayo umncinci, kwaye xa inyibilikisiwe, ilangabi kunye nentsalela yesinyithi ziyatshizwa ukusuka kwityhubhu ye-fuse ukuya kumacala omabini.

2. Intshayelelo yeifusi ethintela umbane
Ucingo lobhedu olufakwe isilivere lusetyenziswa njengefusi kwaye luboshwe ngaxeshanye kwisiseko seseramikhi ukwenza yonke into enyibilikayo. Ifusi ixutywe ngeebhola zetin, ezisebenzisa isiphumo se-metallurgical, esinokuphucula ingxaki yokuba ubushushu boqhagamshelwano bunyuka kakhulu xa umsinga wokugqithisa uphantsi, kwaye itin. Ibhola ayinampembelelo ingako ekuphulweni kwesekethe emfutshane, kuba ixesha lesekethe emfutshane lifutshane kakhulu. Ifusi yenziwe ngezinto zeseramikhi kwaye izaliswe yisanti yequartz njengesizalisi. Zombini iziphelo zetyhubhu yefusi ziintloko zobhedu njengezihlanganisi.
Xa ukunyibilika kuphantsi kwesenzo se-fault current, kuqala kuyahlangana, kwaye i-small gap iyaqhekeka ukuze kuveliswe i-arc, kwaye emva koko i-gap iyandiswa kancinci kancinci kwaye inkqubo yokuqhekeka iyenzeka, de i-recovery voltage ingasabangela ukuba i-gap iqhekeke kwaye umgca unqunyulwe. Ngenxa yesiphumo esinamandla sokuhlukana kwesanti ye-quartz, i-short-circuit current iyanqunyulwa okanye inqunyulwe ngaphambi kokuba ifikelele kwixabiso eliphezulu, ngoko ke ibizwa ngokuba yi-current-limiting fuse.
Xaifusi yokunciphisa yangokuinqumla umgca, i-arc icinyiwe kwityhubhu yefuse evaliweyo, kwaye isetyenziswa kakhulu kwizixhobo zokusasaza umbane zangaphakathi. Ngenxa yesiphumo sokunciphisa samanje, iimfuno zozinzo olunamandla nolushushu lwezixhobo zombane kwisekethe ziyancitshiswa.