Basic Structure Ntawm High Voltage Fuse
May 18, 2022
Lub fuse feem ntau yog tsim los ntawm cov hlau fused (tseem hu ua yaj), ib feem tam sim no (sib cuag) uas txhawb cov yaj, thiab lub plhaub. Qee lub fuses kuj tau nruab nrog tshwj xeeb arc extinguishing tshuaj, xws li roj-tsim fiber ntau raj, quartz xuab zeb, thiab lwm yam, uas yog siv los tua cov arc tsim thaum lub fuse yog tshuab.
Lub yaj yog qhov tseem ceeb ntawm lub fuse. Cov khoom siv yaj yuav tsum muaj qhov qis melting, zoo hluav taws xob conductivity, tsis yooj yim rau oxidize thiab yooj yim rau txheej txheem. Cov khoom siv hlau xws li txhuas, txhuas-tin alloy, zinc, tooj liab, thiab nyiaj feem ntau yog siv.
Cov ntsiab lus melting ntawm cov hlau lead, txhuas-tin alloy thiab zinc yog qhov tsawg, 320 degree c, 200 degree c thiab 420 degree c feem, tab sis cov hluav taws xob conductivity tsis zoo, yog li qhov cross-section ntawm fuse qhov chaw ua los ntawm cov ntaub ntawv no yog loj heev, thiab cov hlau vapor generated thaum lub fuse tawg ntau dhau tsis zoo rau arc extinguishing. Yog li ntawd, nws tsuas yog siv rau hauv cov khoom siv hluav taws xob tsawg tsawg ntawm 500v thiab qis dua.
Tooj thiab nyiaj muaj hluav taws xob zoo, tab sis lawv cov ntsiab lus melting yog 1080 degree thiab 960 degree, feem. Cov "metallurgical effect" yuav siv tau los txo qhov melting point, uas yog, solder pob ntawm txhuas los yog tin ntawm refractory fusion qhov chaw. Thaum qhov kub thiab txias Thaum lub melting point ntawm txhuas los yog tin mus txog, cov refractory hlau thiab molten lead los yog tin tsim ib tug alloy nrog siab tsis kam thiab tsawg melting point. Yog li ntawd, qhov fused yog thawj zaug fused ntawm lub pob me, thiab tom qab ntawd lub arc melts tag nrho cov fused qhov chaw.
