Dab tsi yog qhov ntsuas tseem ceeb ntawm kev fuse?
(1) Rated voltage
Cov hluav taws xob uas fuse tuaj yeem tiv taus thaum ua haujlwm ntev thiab tom qab nws tawg nws feem ntau sib npaug los yog ntau dua qhov ntsuas hluav taws xob ntawm cov khoom siv hluav taws xob.
(2) Rated tam sim no
Qhov tam sim no uas lub fuse tuaj yeem hla mus ntev ntev yog nyob ntawm cov kev tso cai kub nce ntxiv ntawm txhua ntu ntawm lub fuse ntev.
(3) Qhov kawg rhuav tau
Lub fuse tuaj yeem tso siab tau rau hluav taws xob ntau luv luv tam sim no nyob rau hauv kev ua txhaum. Nws yog ib qho ntawm cov tseem ceeb qhia kev ntawm fuse.
(4) Pre-arc tam sim no-sijhawm ua cim.
(5) i2t tus yam ntxwv
Thaum lub rhuav tshem tam sim no loj heev, nws yog qhov txaus los ntawm qhov kev ua haujlwm ntawm lub fuse nrog lub cim ua ntej tam sim no-lub sijhawm, vim hais tias lub sijhawm no lub sijhawm arcing tsis tuaj yeem tsis quav ntsej nyob rau lub sijhawm fusing tag nrho. Thiab vim tias qhov tam sim no tau tawg nyob rau hauv 20ms lossis txawm tsawg dua nyob rau lub sijhawm no, yog tias nws raug sawv cev los ntawm cov txiaj ntsig zoo ntawm sine yoj, nws tsis tsim nyog los txheeb xyuas nws cov nyhuv thermal. Yog li ntawd, qhov tsis tseem ceeb (∫t0
idt) los sawv cev rau cov nyhuv thermal, uas yog tus cwj pwm i2t. Feem ntau, kev tiv thaiv kev ua haujlwm ntawm lub fuse yog tus yam ntxwv i2t thaum lub sijhawm fusing tsawg dua 0.1s; thaum lub sijhawm fusing ntau dua 0.1s, nws yog tus cwj pwm ua ntej-arc siv tam sim no-sijhawm ua cim.
(6) Txuas kev tshaj rau overvoltage
Thaum lub fuse tawg Circuit Court vim qhov tsis muaj qhov sib txuas ntawm txoj kab, qhov kev coj tus kheej uas muaj peev xwm dhau qhov ntsuas hluav taws xob ntawm kab ntau zaus, uas yuav cuam tshuam rau cov txheej txheem arc extinguishing, kuj yuav ua kev puas tsuaj rau rwb thaiv tsev ntawm cov kab thiab cov khoom siv hluav taws xob. Rau lub fuse nrog tam sim no limiting muaj nuj nqi, lub overvoltage yog siab heev, uas yuav tsum tau them nyiaj tshwj xeeb rau.