Lub fuse puas yog lub cuab yeej tseem ceeb lossis theem nrab?
Lub fuse yog qhov kev tiv thaiv tam sim no, tsis hais txog txoj kev tiv thaiv kev tiv thaiv lossis kev tiv thaiv Circuit Court lwm qhov, nws yog leej twg?
Cov lus teb yog: lub fuse tuaj yeem siv rau hauv qhov hluav taws xob thawj lossis theem nrab Circuit Court. Nws yog nyob ntawm txoj kab uas yuav tsum tau ua thiab qauv ua qauv txwv ntawm lub fuse. Ua ntej tshaj, cia' s xam ua dab tsi hu ua lub voj? Dab tsi yog qhov hluav taws xob theem nrab? Lub hauv paus hu ua thawj lub voj hais txog lub voj uas siv los hloov lub zog hluav taws xob hauv Circuit Court. Lub hauv paus hluav taws xob yog tus cwj pwm los ntawm cov hluav taws xob loj tam sim no, nce qhov kub thiab siab, thiab lub siab luv luv ntawm Circuit Court; qhov hluav taws xob theem nrab yog siv hauv Circuit Court rau kev tswj, cov teeb liab ua kom pom tseeb, kev hloov kho parameter thiab kev tiv thaiv parameter chaw. Qhov hluav taws xob txuas nruab nrab yog cim los ntawm tsawg tam sim no, qhov kub tsis nce, thiab feem ntau tsis muaj overload. Hauv lub teb chaws tus qauv, thawj lub voj voos yog txhais tau tias yog kev sib tw hluav taws xob tseem ceeb, thiab Circuit Court sib txuas lus tau txhais tau tias yog ntu kev pabcuam txuas.
Cia' s coj los saib rau lub teb chaws tus qauv GB14048.1" Khoom Siv Hluav Taws Xob Hloov qis thiab tswj cov khoom siv ntu 1: Cov Kev Siv Dav"
Peb tau pom tias txawm tias nws yog qhov tseem ceeb Circuit Court (thawj Circuit Court) lossis ntu txuas (Circuit Court), cov khoom siv hloov tau muaj teeb meem nrog qhov kub thiab kub. Los ntawm lub ntsiab cai ntawm kev pom, lub fuse siv cov cua sov tsim tom qab tam sim no ntws los ntawm cov fuse conductive los ua lub fuse, thiab tom qab ntawd txiav tawm cov channel uas tam sim no ntws hauv Circuit Court. Yog li ntawd, lub fuse, zoo li kev tiv thaiv Circuit Court, muaj kev ua haujlwm ntawm kev txiav tawm ntawm kev tiv thaiv overcurrent Circuit Court. Nws tuaj yeem pom tau hais tias tsis muaj teeb meem cov thawj Circuit Court lossis theem nrab Circuit Court, lawv txhua tus xav tau kab kev tiv thaiv, yog li cov dav hluav taws xob siv tau rau ob qho kev sib txuas ua ke thiab kev sib txuas ua ke. Txawm li cas los xij, lub fuse siv nyob rau hauv thawj Circuit Court thiab lub fuse siv nyob rau hauv theem nrab Circuit Court muaj qhov sib txawv me ntsis qauv. Saib daim duab qhia lub npe. Txij li tam sim no ntawm theem nrab Circuit Court feem ntau tsis tshaj 5A, sab hauv ntawm lub Circuit Court txuas hluav taws xob tsuas yog fuse yooj yim. Thaum lub tshuab hluav taws xob, nws yuav tsis tsim cov arc loj heev. Cia' s saib ib qho piv txwv: xav tias qhov sib xyaw ntawm cov fuse yog tsim los ntawm cov hlau txhuas nrog txoj kab uas hla D=2 hli thiab ntev L=50 hli. Nws paub tias lub siab yaj ntawm cov hlau lead no yog 327 degrees, qhov ntsuas kub tsis haum ntawm qhov tsis kam ntawm xoom qib, qhov thev tsis kam, thiab cov hluav taws xob kub ua kom tsis haum coefficient ntawm cov hlau txhuas no. Cia' s nrhiav kom paub: Dab tsi yog qhov siab tshaj plaws tam sim no tau tso cai los ntawm cov hlau lead no ntev ntev thaum chav sov yog 20 degrees?
Txij li thaum lub sijhawm-tam sim no tus yam ntxwv nkhaus monotonously poob raws li qhov tam sim no nce ntxiv, peb hu qhov no tus yam ntxwv ua ntu zus rov ua ke. Txij li thaum lub sijhawm fuse ntawm lub fuse fuse tau hloov ntau heev, yuav ua li cas fuse lossis fuse sab hauv fuse siv nyob rau hauv thawj qhov hluav taws xob tswj lub sijhawm fuse? Qhov tshwm sim nthuav yuav tshwm sim ntawm no, hu ua cov khoom siv hauv xim hlau. Peb paub tias piv nrog cov tooj liab ntshiab, lub ntsiab lus tawg ntawm tooj liab-tin alloy, uas yog, tooj dag, yog tus nqi tsawg, txog 800 ° C. Cov ntsiab lus tin yog li 25%. Koj paub, lub ntsiab lus yaj ntawm ntshiab tooj liab yog 1083 ° C, uas nws txawv heev hauv kev sib piv. Qhov no qhia peb qhov tseeb: thawj cov ntawv pov thawj muaj qhov qis qis dua li cov hlau ntshiab, uas yog cov nyhuv ua xim hlau.
Thaum cov nplooj ntawv tooj liab ua kom sov vim yog qhov ntws tawm ntawm tam sim no, cov hlaws dai ua ntej kom yaj, thiab tom qab ntawd nws tsim cov ntawv hlau sib xyaw nrog tooj liab, thiab cov ntsiab lus yaj yog txo qis heev, txog 400 degrees. Txoj kev no, los ntawm kev tswj lub ntim ntawm lub pob zeb hlaws, qhov kub thiab txias ntawm cov ntawv tooj liab fusing tuaj yeem tswj tau, yog li paub qhov tseeb ntawm kev tswj fuse tam sim no ntawm fuse. Thaum cov yaj yaj tag, cov xuab zeb zoo tuaj yeem tiv thaiv tsis tau lub lev. Qhov no yog txoj cai ua haujlwm ntawm thawj Circuit Court fuse yaj.
Thaum cov nplooj ntawv tooj liab ua kom sov vim yog qhov ntws tawm ntawm tam sim no, cov hlaws dai ua ntej kom yaj, thiab tom qab ntawd nws tsim cov ntawv hlau sib xyaw nrog tooj liab, thiab cov ntsiab lus yaj yog txo qis heev, txog 400 degrees. Txoj kev no, los ntawm kev tswj lub ntim ntawm lub pob zeb hlaws, qhov kub thiab txias ntawm cov ntawv tooj liab fusing tuaj yeem tswj tau, yog li paub qhov tseeb ntawm kev tswj fuse tam sim no ntawm fuse. Thaum cov yaj yaj tag, cov xuab zeb zoo tuaj yeem tiv thaiv tsis tau lub lev. Qhov no yog txoj cai ua haujlwm ntawm thawj Circuit Court fuse yaj.