Kawm paub txog kev hloov tshiab ntawm UL 1449 Surge Protective Devices (SPDs) tus qauv, ntxiv cov kev cai xeem rau cov khoom nyob rau hauv qhov chaw ntub dej, feem ntau yog siv qhov ntsuas kub thiab av noo. Kawm seb tus tiv thaiv surge yog dab tsi, thiab qhov chaw ntub dej yog dab tsi.
Surge protectors (Surge Protective Devices, SPDs) yeej ib txwm suav hais tias yog kev tiv thaiv tseem ceeb tshaj plaws rau cov khoom siv hluav taws xob. Lawv tuaj yeem tiv thaiv cov khoom siv hluav taws xob thiab hluav taws xob hloov pauv, kom cov khoom tiv thaiv yuav tsis raug puas tsuaj los ntawm kev poob siab tam sim ntawd. Lub surge protector tuaj yeem ua tiav cov cuab yeej tsim los ntawm nws tus kheej, lossis nws tuaj yeem tsim los ua ib qho kev tivthaiv thiab nruab rau hauv cov khoom siv hluav taws xob ntawm lub zog hluav taws xob.
Raws li tau hais los saum no, surge protectors yog siv ntau txoj hauv kev, tab sis lawv ib txwm tseem ceeb heev thaum nws los txog rau kev nyab xeeb. Tus qauv UL 1449 yog tus qauv tsim nyog uas niaj hnub no cov kws kho mob paub txog thaum thov kev lag luam.
Nrog rau cov khoom siv hluav taws xob ntau ntxiv thiab nws daim ntawv thov hauv kev lag luam ntau thiab ntau dua, xws li LED txoj kev teeb, railways, 5G, photovoltaics thiab automotive electronics, kev siv thiab kev loj hlob ntawm surge protectors tau nce sai, thiab cov qauv kev lag luam yog qhov tseem ceeb. kom nrawm nrog lub sijhawm thiab hloov kho tshiab.
Txhais ntawm Humid Ib puag ncig
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:
Qhov chaw tiv thaiv los ntawm huab cua thiab tsis raug saturation nrog dej los yog lwm yam kua, tab sis nyob rau hauv nruab nrab ntawm noo noo.
Tshwj xeeb, cov tsev pheeb suab, qhib porches, thiab hauv qab daus lossis cov tsev khaws khoom tub yees, thiab lwm yam, yog qhov chaw uas "yuav tsum tau muaj dej noo txaus" hauv txoj cai.
Thaum lub surge protector (xws li varistor) yog ntsia rau hauv ib qho khoom kawg, nws yog feem ntau vim hais tias cov khoom kawg yog ntsia los yog siv nyob rau hauv ib puag ncig uas muaj varied humidity, thiab nws yuav tsum tau txiav txim siab hais tias nyob rau hauv xws li ib tug ntub ib puag ncig, surge. tiv thaiv seb nws puas tuaj yeem ua tau raws li cov qauv kev nyab xeeb hauv ib puag ncig.
Cov khoom lag luam kev ntsuas kev ntsuas yuav tsum muaj nyob rau hauv qhov chaw ntub dej
Ntau tus qauv qhia tau hais tias cov khoom yuav tsum dhau los ntawm kev ntsuam xyuas kev ntseeg tau los xyuas qhov kev ua tau zoo thaum lub sij hawm lub neej ntawm cov khoom, xws li kub thiab av noo, thermal shock, vibration thiab poob cov khoom. Rau cov kev ntsuam xyuas uas muaj simulated humid ib puag ncig, qhov ntsuas kub thiab av noo tas li yuav raug siv los ua qhov kev ntsuam xyuas tseem ceeb, tshwj xeeb tshaj yog 85 ° C kub / 85% av noo (feem ntau hu ua "ob chav 85 xeem") thiab 40 ° C kub / 93% Humidity Kev sib xyaw ua ke ntawm no ob txheej parameter.
Qhov ntsuas kub thiab av noo tas li yog lub hom phiaj txhawm rau txhawm rau lub neej ntawm cov khoom los ntawm kev sim. Nws tuaj yeem txheeb xyuas qhov muaj peev xwm tiv thaiv kev laus ntawm cov khoom, suav nrog kev txiav txim siab seb cov khoom puas muaj cov yam ntxwv ntawm lub neej ntev thiab kev poob qis hauv ib puag ncig tshwj xeeb.
Peb tau ua ib daim ntawv ntsuam xyuas ntawm kev lag luam, thiab cov txiaj ntsig tau pom tias muaj coob tus ntawm cov khoom lag luam davhlau ya nyob twg tau ua cov kev ntsuas kub thiab av noo ntawm cov khoom tiv thaiv surge thiab cov khoom siv sab hauv, tab sis UL 1449 tus qauv nyob rau lub sijhawm ntawd tsis muaj qhov ntsuas kub thiab av noo. Yog li ntawd, cov chaw tsim khoom yuav tsum ua cov kev ntsuam xyuas ntxiv ntawm nws tus kheej tom qab tau txais daim ntawv pov thawj UL 1449; thiab yog tias yuav tsum muaj daim ntawv pov thawj thib peb, qhov ua tau ntawm cov txheej txheem kev ua haujlwm tau hais los saum no yuav raug txo. Ntxiv mus, thaum cov khoom siv davhlau ya nyob twg siv rau UL daim ntawv pov thawj, nws tseem yuav ntsib qhov xwm txheej uas daim ntawv pov thawj ntawm cov khoom siv sab hauv lub siab-rhiab heev tsis suav nrog hauv qhov chaw ntub dej ntawm daim ntawv thov, thiab yuav tsum muaj kev ntsuam xyuas ntxiv.
Peb nkag siab txog cov kev xav tau ntawm cov neeg siv khoom thiab tau txiav txim siab los pab cov neeg siv khoom daws cov teeb meem kev mob tshwm sim hauv kev ua haujlwm tiag tiag. UL tau tshaj tawm 1449 tus qauv hloov tshiab txoj kev npaj.
Cov kev cai xeem sib raug tau ntxiv rau tus qauv
Tus qauv UL 1449 tsis ntev los no tau ntxiv cov kev ntsuas rau cov khoom hauv qhov chaw ntub dej. Cov neeg tsim khoom tuaj yeem xaiv ntxiv qhov kev xeem tshiab no rau hauv cov ntaub ntawv xeem thaum thov rau UL ntawv pov thawj.
Raws li tau hais los saum no, daim ntawv thov ib puag ncig ntub dej feem ntau siv qhov ntsuas kub thiab av noo tas li. Cov hauv qab no qhia txog cov txheej txheem xeem los txheeb xyuas qhov tsim nyog ntawm Varistor (MOV) / Gas Discharge Tube (GDT) rau cov ntawv thov ib puag ncig ntub dej:
Cov qauv kuaj thawj zaug yuav raug kuaj xyuas kev laus nyob rau hauv qhov kub thiab txias siab rau 1000 xuab moos, thiab tom qab ntawd qhov hluav taws xob varistor ntawm lub varistor lossis qhov tawg ntawm cov roj tso tawm lub raj yuav muab piv kom paub meej tias qhov kev tiv thaiv kev tiv thaiv puas tuaj yeem ua tau. nyob rau lub sijhawm ntev Nyob rau hauv qhov chaw ntub dej, nws tseem tuav nws qhov kev tiv thaiv thawj zaug.
Post lub sij hawm: May-09-2023