CHIYAMBI CHA FYUSI YA VETERI YAMBIRI

Ma fuse amphamvu kwambiriKawirikawiri amagwiritsidwa ntchito m'ma gridi amagetsi ang'onoang'ono okhala ndi voteji yochepera 35kV. Pakachitika overload kapena short circuit mu dongosolo, kusungunuka kumaphulika chifukwa cha kutentha kwambiri, motero kumadula chingwe ndikuteteza gridi yamagetsi ndi zida zamagetsi. Mfundo yake yogwirira ntchito ndi yofanana ndi ya ma fuse amagetsi otsika. Ma fuse ndi omwewo.
Ma fuse amagetsi amphamvu amagawidwa m'mitundu iwiri: kuchepetsa mphamvu yamagetsi ndi kutsika kwa magetsi. Tanthauzo la kuchepetsa mphamvu yamagetsi ndikuchepetsa mphamvu yamagetsi yafupipafupi kuti ifike pamtengo wapamwamba kwambiri, motero kuswa mzere pamtengo winawake usanafike mtengo wapamwamba wa mphamvu yafupipafupi, ndikuchepetsa kuwonongeka kwa mphamvu yamagetsi yafupipafupi pa chingwe ndi zida zamagetsi.

1. Chiyambi cha fuse yoponya
Chipilala chotetezera kutentha chimagwira ntchito yokhazikitsa, kukhazikika ndi kutchinjiriza, ndipo zinthuzo ndi zadothi. Chubu chosungunula chimagwira ntchito yoteteza kutentha ndi kuzimitsa arc. Chigawo chakunja chimapangidwa ndi chubu cha pepala la phenolic kapena chubu cha nsalu yagalasi ya epoxy, ndipo gawo lamkati limapangidwa ndi zinthu zopangira mpweya monga chubu cha pepala lachitsulo kapena chubu cha pepala la shellac. Malekezero onse awiri a chubu chosungunula ndi olumikizana apamwamba ndi otsika. Kusungunuka kumadutsa mu chubu chosungunula, mbali imodzi imakhazikika pa cholumikizira chapansi, mbali inayo imamangiriridwa pa mbale yokakamiza yomwe imatha kuzungulira mozungulira mzere, ndipo mbale yokakamiza imakanikizidwa pa pepala lachitsulo la kasupe kuti ipange cholumikizira chapamwamba. Chubu chosakanikirana chimakhazikika pakati pa chothandizira chachitsulo ndi duckbill. Mukayika, pangani chubu cha fuse ndi mzere woyima kukhala ngodya ya 30°. Pambuyo poti kusungunuka kwaphatikizidwa, mbale yokakamiza imazungulira mozungulira shaft pansi pa ntchito ya kasupe, cholumikizira chapamwamba chimatuluka pa lilime la chivundikiro cha duckbill, ndipo chubu cha fuse chimazungulira mozungulira shaft 3 ndi mphamvu yake yokoka, chimapachikidwa mozondoka pa chothandizira, ndipo chimanenedwa kuti chikugwa. Pambuyo poti kusungunuka kwaphulika ndipo arc yapangidwa,
Kutentha kwa arc kumapangitsa kuti zinthu zomwe zili pakhoma lamkati la chubu chosungunula zipange mpweya, kupanikizika mu chubucho kumakwera, mpweya umatulutsidwa kunja mwachangu kwambiri, ndipo arc imawombedwa mozungulira, ndipo arc imazimitsidwa pamene mphamvu yamagetsi imadutsa zero.
Pambuyo poti chubu cha fuse chagwa, chotsani chubu cha fuse ndi ndodo yotetezera kutentha ndikuyikanso chosungunuka chatsopano. Pambuyo poti vuto lachotsedwa, kankhira chubu cha fuse pamalo otseka.
Fuse ndi yosavuta kupanga komanso yotsika mtengo. Vuto lake ndilakuti mphamvu yosweka imakhala yochepa, ndipo ikasungunuka, lawi ndi zotsalira zachitsulo zimapopedwa kuchokera ku chubu cha fuse mpaka kumapeto onse awiri.

2. Chiyambi chafuse yoletsa mphamvu yamagetsi
Waya wamkuwa wopangidwa ndi siliva umagwiritsidwa ntchito ngati fuse ndipo umapindika pamodzi pa ceramic core kuti upange kusungunuka konse. Fuse imagulitsidwa ndi mipira ya tin, yomwe imagwiritsa ntchito mphamvu ya metallurgical, yomwe ingathandize kuthetsa vuto lakuti kutentha kwa contact kumakwera kwambiri pamene overload current ili yochepa, ndipo tin Mpirawo sukhudza kwambiri kuswa short circuit, chifukwa nthawi ya short circuit ndi yochepa kwambiri. Fuse imapangidwa ndi zinthu za ceramic ndipo imadzazidwa ndi mchenga wa quartz ngati filler. Malekezero onse awiri a fuse chubu ndi zipewa zamkuwa ngati contacts.
Pamene kusungunuka kuli pansi pa mphamvu ya fault current, choyamba kumalumikizana, ndipo gap yaying'ono imasweka kuti ipange arc, kenako gap imakulitsidwa pang'onopang'ono ndipo njira yosweka imachitika, mpaka mphamvu yobwezeretsa magetsi isakupangitsenso kuti gap isweke ndipo mzerewo umadulidwa. Chifukwa cha mphamvu yamphamvu ya dissociation ya mchenga wa quartz, short-circuit current imadulidwa kapena kuchepetsedwa isanafike pamtengo wapamwamba, kotero imatchedwa current-limiting fuse.
Pamenefuse yoletsa mphamvu yamagetsiAkadula chingwecho, arc imazimitsidwa mu chubu chotsekedwa cha fuse, ndipo imagwiritsidwa ntchito kwambiri muzipangizo zogawa mphamvu zamkati. Chifukwa cha mphamvu yochepetsera mphamvu yamagetsi, zofunikira pa kukhazikika kwa mphamvu ndi kutentha kwa zida zamagetsi mu dera zimachepa.