Video: Puas yog arc flash daim ntawv yuav tsum tau ntawm kev txiav?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
2. yog txiav tawm zoo li yuav xav tau kev kuaj xyuas, kho, kev pabcuam, lossis kev saib xyuas thaum muaj zog? Yog tias koj teb YES rau ob nqe lus nug, koj xav tau ib qho arc flash ceeb toom daim ntawv lo . CEEB TOOM: Yog lawm, cov lus nug yuav luag zoo ib yam hauv ob qho tib si, NEC thiab NFPA.
Thiab cov lus nug yog, puas yuav tsum tau arc flash labels?
Arc flash labeling yog lub luag haujlwm ntawm tus tswv haujlwm, tsis yog cov chaw tsim khoom lossis tus neeg tsim khoom ntawm cov khoom siv. Labeling yog xav tau rau txhua yam khoom siv hluav taws xob uas yuav xav tau kev kuaj xyuas, kho, kev pabcuam lossis kev saib xyuas thaum muaj zog, tsim kom muaj peev xwm ua tau arc flash xwm txheej tshwm sim.
Ib yam li ntawd, cov khoom siv twg xav tau arc flash ntawv? Ntawm no yog ib tug hint… tsis yog txhua yam hluav taws xob khoom siv yuav tsum tau ib arc flash daim ntawv lo.
Cov khoom uas yuav tsum muaj cov ntawv ceeb toom arc flash:
- Switchboards / Panelboards / Distribution boards.
- Industrial Control Vaj Huam Sib Luag.
- Cov Circuit Court Breakers.
- Motor Control Centers.
- Disconnects/Safety Switches (fused)
- Inverters.
- UPS.
- CT Cans.
Ib yam li ntawd, puas arc flash labels tas sijhawm?
Arc flash ceeb toom cov ntawv tas sij hawm tom qab 5 xyoos. Ua ntej daim ntawv lo hloov ib arc txhaum xam yuav tsum tau ua kom paub tseeb tias cov ntaub ntawv ntawm lub daim ntawv lo tseem muaj tseeb. Cov tshuab hluav taws xob ib kab kab kos yuav tsum tau hloov kho thaum muaj kev hloov pauv.
Cov ntaub ntawv dab tsi yog muab rau ntawm arc flash label?
Yam tsawg kawg, cov no daim ntawv lo yuav tsum muaj lub nominal system voltage, lub arc flash ciam teb, thiab tsawg kawg yog ib qho ntawm cov hauv qab no: qhov muaj xwm txheej muaj zog thiab qhov sib txuas ua haujlwm nyob deb lossis qhov arc flash PPE qeb pom nyob rau hauv PPE pawg lus, yam tsawg kawg nkaus arc qhov ntsuas ntawm cov khaub ncaws, lossis qhov chaw tshwj xeeb
Pom zoo:
Puas yog nws muaj tseeb tias nyob rau hauv kev thauj mus los ntawm kev txav ntawm cov khoom hla ib daim nyias nyias yuav tsum muaj zog?
Hauv kev thauj mus los passive, kev txav ntawm cov khoom hla ib daim nyias nyias yuav tsum muaj zog. _ Muaj tseeb_ 5. Endocytosis yog ib txoj kev uas ib lub cell membrane nyob ib puag ncig thiab siv cov khoom los ntawm ib puag ncig. Ib daim nyias nyias uas tso cai rau qee cov ntaub ntawv dhau los qhia txog kev xaiv permeability
Yuav ua li cas yog daim ntawv cog lus sib txawv ntawm daim ntawv cog lus ionic?
Qhov sib txawv ntawm cov ionic thiab covalent daim ntawv cog lus yog tias covalent daim ntawv cog lus yog tsim thaum ob lub atoms sib koom electrons. Ionic bonds yog lub zog uas tuav ua ke electrostatic zog ntawm kev nyiam ntawm cov ions oppositely them. Ionic bonds muaj qhov sib txawv electronegativity ntau dua lossis sib npaug li 2
Dab tsi yog qhov kev txiav txim ntawm cov ntawv sau hauv daim ntawv APA?
Kev txiav txim ntawm nplooj ntawv sau: Cov nplooj ntawv ntawm cov ntawv sau yuav tsum tau npaj: nplooj ntawv npe, paub daws teeb meem, ntawv nyeem, cov lus siv, cov lus, cov duab, cov ntawv txuas ntxiv. Thaum koj ua tiav kev tshuaj xyuas cov ntaub ntawv no, sim koj qhov kev paub ntawm no! Thaum koj ua tiav nrog kev tshuaj xyuas kev paub, nyem 'Tom ntej' nyob rau sab saum toj ntawm hauv qab ntawm nplooj ntawv txuas ntxiv mus
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Dab tsi yuav tsum muaj arc flash label?
Arc Flash Label Requirements. Arc flash hazard labels yuav tsum muab tso rau ntawm ib qho khoom siv hluav taws xob uas cov neeg ua haujlwm yuav tsum tau ua haujlwm thaum cov cuab yeej tseem muaj zog. Qhov no feem ntau suav nrog cov khoom siv xws li panelboards, switchboards, thiab meter socket enclosures