Kawm txog qhov hloov tshiab ntawm UL 1449 Surge Protective Devices (SPDs) tus qauv, ntxiv cov kev cai xeem rau cov khoom hauv cov chaw noo noo, feem ntau yog siv cov kev ntsuas kub thiab av noo tas li. Kawm seb tus tiv thaiv hluav taws xob yog dab tsi, thiab qhov chaw ntub dej yog dab tsi.
Cov khoom tiv thaiv hluav taws xob (Surge Protective Devices, SPDs) yeej ib txwm raug suav hais tias yog kev tiv thaiv tseem ceeb tshaj plaws rau cov khoom siv hluav taws xob. Lawv tuaj yeem tiv thaiv lub zog sib sau ua ke thiab kev hloov pauv ntawm lub zog, yog li cov khoom siv tiv thaiv yuav tsis raug puas tsuaj los ntawm kev poob siab tam sim ntawd. Lub cuab yeej tiv thaiv hluav taws xob tuaj yeem yog ib lub cuab yeej ua tiav uas tsim los ntawm nws tus kheej, lossis nws tuaj yeem tsim los ua ib feem thiab ntsia rau hauv cov khoom siv hluav taws xob ntawm lub zog hluav taws xob.
Raws li tau hais los saum toj no, cov khoom tiv thaiv hluav taws xob tau siv ntau txoj hauv kev sib txawv, tab sis lawv yeej ib txwm tseem ceeb heev thaum nws los txog rau kev ua haujlwm kev nyab xeeb. Tus qauv UL 1449 yog qhov yuav tsum tau ua uas cov kws kho mob niaj hnub no paub txog thaum thov kev nkag mus rau hauv kev lag luam.
Nrog rau qhov nyuaj ntawm cov khoom siv hluav taws xob thiab nws daim ntawv thov hauv ntau thiab ntau qhov kev lag luam, xws li LED txoj kev teeb, kev tsheb ciav hlau, 5G, photovoltaics thiab cov khoom siv hluav taws xob hauv tsheb, kev siv thiab kev txhim kho ntawm cov neeg tiv thaiv kev co tau nce sai, thiab cov qauv kev lag luam kuj tseem yuav tsum tau ua raws li lub sijhawm thiab hloov kho tshiab.
Kev Txhais ntawm Ib puag ncig noo noo
Txawm hais tias nws yog NFPA 70 ntawm National Fire Protection Association (NFPA) lossis National Electrical Code® (NEC), "qhov chaw ntub dej" tau txhais meej meej raws li hauv qab no:
Cov chaw uas muaj kev tiv thaiv los ntawm huab cua thiab tsis raug dej los yog lwm yam kua dej ntub tab sis raug rau cov dej noo nruab nrab.
Tshwj xeeb, cov tsev pheeb suab, cov qhov rooj qhib, thiab cov qab nthab lossis cov tsev rau khoom txias, thiab lwm yam, yog cov chaw uas "raug rau qhov dej noo nruab nrab" hauv cov cai.
Thaum tus tiv thaiv kev co (xws li varistor) raug ntsia rau hauv cov khoom kawg, nws feem ntau yog vim tias cov khoom kawg tau teeb tsa lossis siv rau hauv ib puag ncig nrog cov av noo sib txawv, thiab nws yuav tsum tau xav txog tias nyob rau hauv ib puag ncig noo noo, tus tiv thaiv kev co Seb nws puas tuaj yeem ua tau raws li cov qauv kev nyab xeeb hauv ib puag ncig dav dav.
Cov Kev Cai Ntsuas Kev Ua Haujlwm ntawm Khoom Siv hauv Qhov Chaw Uas Muaj Av noo
Ntau tus qauv qhia meej tias cov khoom yuav tsum dhau ntau qhov kev ntsuam xyuas kev ntseeg siab kom paub tseeb tias qhov ua tau zoo thaum lub sijhawm ua haujlwm ntawm cov khoom, xws li qhov kub thiab txias siab, qhov kub thiab txias poob siab, kev co thiab kev poob qis. Rau kev ntsuam xyuas uas muaj cov chaw noo noo, kev ntsuam xyuas qhov kub thiab txias tas li yuav raug siv ua qhov kev ntsuam xyuas tseem ceeb, tshwj xeeb tshaj yog qhov kub thiab txias 85 ° C / 85% noo noo (feem ntau hu ua "ob chav 85 xeem") thiab qhov kub thiab txias 40 ° C / 93% noo noo Kev sib xyaw ua ke ntawm ob pawg ntawm cov kev ntsuas no.
Qhov kev sim kub thiab av noo tas li yog xav kom ua kom cov khoom siv tau ntev dua los ntawm kev sim. Nws tuaj yeem soj ntsuam qhov muaj peev xwm tiv thaiv kev laus ntawm cov khoom, suav nrog kev xav txog seb cov khoom puas muaj lub neej ntev thiab poob qis hauv ib puag ncig tshwj xeeb.
Peb tau ua ib daim ntawv nug txog kev lag luam, thiab cov txiaj ntsig qhia tau tias muaj ntau tus neeg tsim khoom lag luam hauv davhlau ya nyob twg tab tom ua qhov yuav tsum tau ua kom ntsuas qhov kub thiab txias ntawm cov khoom tiv thaiv hluav taws xob thiab cov khoom siv sab hauv, tab sis tus qauv UL 1449 thaum lub sijhawm ntawd tsis muaj qhov sib xws Yog li ntawd, tus neeg tsim khoom yuav tsum ua qhov kev ntsuam xyuas ntxiv los ntawm nws tus kheej tom qab tau txais daim ntawv pov thawj UL 1449; thiab yog tias xav tau daim ntawv qhia txog daim ntawv pov thawj sab nraud, qhov ua tau ntawm cov txheej txheem ua haujlwm tau hais los saum toj no yuav raug txo qis. Ntxiv mus, thaum cov khoom lag luam davhlau ya nyob twg thov rau daim ntawv pov thawj UL, nws tseem yuav ntsib qhov xwm txheej uas daim ntawv qhia txog daim ntawv pov thawj ntawm cov khoom siv sab hauv uas muaj kev ntxhov siab tsis suav nrog hauv kev sim daim ntawv thov ib puag ncig ntub, thiab xav tau kev ntsuam xyuas ntxiv.
Peb nkag siab txog cov kev xav tau ntawm cov neeg siv khoom thiab peb txiav txim siab los pab cov neeg siv khoom daws cov teeb meem uas ntsib hauv kev ua haujlwm tiag tiag. UL tau tshaj tawm txoj kev npaj hloov kho tus qauv 1449.
Cov kev cai xeem sib xws ntxiv rau tus qauv
Tus qauv UL 1449 nyuam qhuav ntxiv cov kev cai kuaj rau cov khoom nyob rau hauv cov chaw ntub dej. Cov chaw tsim khoom tuaj yeem xaiv ntxiv qhov kev xeem tshiab no rau hauv rooj plaub kuaj thaum thov daim ntawv pov thawj UL.
Raws li tau hais los saum toj no, kev sim siv rau ib puag ncig ntub feem ntau siv qhov kev sim kub thiab av noo tas li. Cov hauv qab no piav qhia txog cov txheej txheem sim kom paub tseeb tias Varistor (MOV) / Gas Discharge Tube (GDT) siv tau rau kev siv rau ib puag ncig ntub:
Cov qauv kuaj yuav raug kuaj xyuas kev laus ua ntej hauv qab qhov kub thiab txias thiab av noo rau 1000 teev, thiab tom qab ntawd lub zog varistor ntawm varistor lossis lub zog tawg ntawm lub raj xa roj yuav raug piv rau kom paub meej tias cov khoom tiv thaiv kev co tuaj yeem kav ntev hauv qhov chaw noo noo, nws tseem khaws nws cov kev ua tau zoo tiv thaiv qub.
Lub sijhawm tshaj tawm: Tsib Hlis-09-2023