US Voltage: Cov qauv, Variations & Insights

Cov lus teb ib txwm yog qhov yooj yim: feem ntau cov khw muag khoom niaj hnub hauv Tebchaws Meskas muab120 volts AC ntawm 60 hertz, hos ntau lub tsev kuj muaj2 40vmuaj rau cov khoom siv loj. Cov lus teb tag nrho yog tias US voltage yog nominal, txhais tau hais tias qhov ntsuas qhov ntsuas hluav taws xob tiag tiag tuaj yeem sib txawv hauv qhov kev lees paub nyob ntawm qhov kev pabcuam, thauj khoom, xaim, thiab kev siv hluav taws xob.

Phau ntawv qhia no piav qhia txog tus qauv voltage US cov neeg siv feem ntau ntsib, vim li cas qhov kev hloov pauv tshwm sim, thiab seb yuav kuaj xyuas dab tsi ua ntej txuas cov khoom siv, chargers, cov cuab yeej, lossis cov khoom siv txawv teb chaws.

Tus qauv voltage hauv Teb Chaws Asmeskas yog dab tsi?

Tus qauv voltage hauv Teb Chaws Asmeskas yog feem ntau piav raws li120 V, 60 Hzrau cov khoom siv hauv tsev zoo tib yam, nrog120/240 V faib{2}}theem kev pabcuammuab ntau qhov chaw nyob. Lub Tsev Haujlwm Saib Xyuas Lub Zog piav qhia txog hluav taws xob hauv Asmeskas li 110-120 V ntawm 60 Hz rau kev siv ib txwm, thaum DOE's Alternative Fuels Data Center sau tseg tias cov neeg siv khoom siv 120/240 V thiab cov neeg siv khoom lag luam lossis kev lag luam feem ntau siv 208/120 V lossis 480/277 V kev pabcuam.

Qhov no yog vim li cas koj thiaj tuaj yeem pom ntau tus lej siv hauv kev sib tham txhua hnub: 110 V, 115 V, 117 V, 120 V, 220 V, 230 V, thiab 240 V. Hauv cov ntsiab lus niaj hnub no feem ntau,120 V thiab 240 V yog cov nqi nominal. Cov ntawv qub qub thiab cov lus hais tsis sib xws feem ntau cuam tshuam txog keeb kwm lossis cov khoom siv -nameplate language es tsis yog lwm qhov hluav taws xob.

Rau cov tsev ib txwm muaj, qhov sib cais- theem kev npaj muab ob "kub" conductors thiab nruab nrab. Ib lub thawv ntim khoom siv tsis tu ncua siv ib qho kub thiab nruab nrab rau txog 120 V. Ib qho loj dua, xws li lub tshuab ziab khaub ncaws, ntau yam, lub tshuab cua txias hauv nruab nrab, lossis Theem 2 EV charging Circuit Court, yuav siv tau ob qho tib si kub conductors txog 240 V.

Nominal voltage tsis yog tus lej tas

Lub ntsiab lus tseem ceeb hauv kev nkag siab txog qhov hluav taws xob hauv Teb Chaws Asmeskas hluav taws xob yog tias "120 volts" tsis txhais tau tias txhua qhov hluav taws xob ntsuas raws nraim 120. Cov khoom siv hluav taws xob tswj qhov hluav taws xob nyob rau hauv kev lees paub kev ua haujlwm vim tias cov khoom hloov pauv txhua hnub, tus neeg xyuas pib ntev tsim qhov hluav taws xob poob, thiab cov khoom siv faib khoom hloov kho kom cov kev pabcuam siv tau.

ANSI C84.1 yog qhov tseem ceeb hauv Teb Chaws Asmeskas siv rau qhov kev ntsuas nominal voltage thiab kev ua haujlwm siab rau 60 Hz hluav taws xob hluav taws xob siab tshaj 100 volts.

NEMA cov ntsiab lus tseem ceeb rau ANSI C84.1-2020 hais tias tus qauv tsim cov kev ntsuas nominal voltage thiab kev ua haujlwm siab thiab suav nrog cov kev ntsuas hluav taws xob nyiam mus txog qhov ntsuas hluav taws xob siab heev.

Ib tsab ntawv xov xwm USDA Cov Kev Pabcuam Hauv Nroog Hauv Nroog uas suav nrog ANSI C84.1-2016 qhia tau hais tias rau qhov nominal 120 V system,Ntau qhov kev pabcuam voltageyog 114V rau 126V, thaumNtau yam B kev pabcuam voltageyog 110 V txog 127 V. Cov ntawv xov xwm tib yam piav qhia tias Range A yog lub hom phiaj ib txwm muaj rau kev ua haujlwm txaus siab, thaum Range B yog rau qhov tsawg zaus thiab sijhawm.

Hauv cov ntsiab lus siv tau, kev nyeem ntawv zoo li 118 V lossis 123 V ntawm lub chaw txais khoom feem ntau tsis xav tsis thoob. Kev nyeem ntawv tsis tu ncua sab nraum qhov ib txwm muaj, nquag dimming, cov cuab yeej siv hluav taws xob ntau dhau, lossis kev cuam tshuam tsis zoo tuaj yeem teeb liab teeb meem thaiv, overloaded Circuit Court, xoob kev sib txuas, los yog kev siv hluav taws xob - sab voltage teeb meem uas tsim nyog tau txais kev saib xyuas.

Common US voltage kev pab cuam los ntawm kev teeb tsa

Cov vaj tsev nyob, kev lag luam, thiab kev lag luam tsis yog txhua tus tau txais lub zog hauv tib qho kev teeb tsa. Qhov "standard" nyob ntawm seb lub tsev tsim los ua haujlwm li cas.

Common low-voltage systems muaj xws li:

120V ib leeg -theem:Siv rau ntau lub thawv, teeb, hluav taws xob, khoom siv me me, thiab ntsaws- hauv chargers.

120/240V ib zaug -theem:Feem ntau hauv cov tsev nyob thiab cov tsev nyob me me, txhawb nqa ob qho tib si 120 V circuits thiab 240 V cov khoom siv.

208Y/120V peb-phase wye:Feem ntau hauv cov tsev, chaw ua haujlwm, cov tsev muag khoom, thiab cov chaw lag luam teeb pom kev zoo uas 120 V receptacles thiab peb -theem loads tuaj yeem ua ke.

480Y/277 V peb-phase wye:Feem ntau hauv cov chaw lag luam loj thiab kev lag luam, feem ntau siv rau lub cev muaj zog, cov cuab yeej HVAC, thiab 277 V teeb pom kev zoo.

480 V peb-phase delta:Siv nyob rau hauv qee cov ntawv thov kev lag luam uas xav tau peb -theem fais fab yam tsis muaj kev teeb tsa nruab nrab.

USDA cov ntsiab lus ntawm ANSI nominal low-voltage standard lists 120 V, 120/240 V, 240/120 V delta, 208Y/120 V, 480Y/277 V, thiab 480 V systems of the low-cov qauv kev lag luam thiab cov neeg siv khoom.

Vim li cas qhov hluav taws xob sib txawv ntawm qhov hluav taws xob mus rau qhov hluav taws xob?

Voltage sib txawv vim hais tias ib qho hluav taws xob system yog dynamic. Thaum lub cev muaj zog pib, cov cuab yeej HVAC mus txog, EV chargers kos tam sim no, lossis ntau yam khoom siv ua haujlwm ib zaug, cov khoom siv hluav taws xob thiab cov hloov pauv hloov pauv. Qhov kev thauj khoom ntawd tuaj yeem tsim hluav taws xob poob nruab nrab ntawm cov khoom siv hluav taws xob, cov khoom siv, cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob.

Cov ntawv xov xwm USDA piav qhia tias qhov hluav taws xob tsis tu ncua ntawm txhua tus neeg siv khoom siv tsis zoo, yog li kev siv hluav taws xob siv hluav taws xob ntau thiab kev coj ua. Nws kuj tseem sau tseg tias cov tswj hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom sib npaug, thiab cov khoom siv pub mis tuaj yeem cuam tshuam rau qib voltage thoob plaws hauv ib qho kev faib khoom.

Hauv ib lub tsev, kev hloov pauv ntxiv tuaj yeem los ntawm:

Ntev ceg -circuit khiav

Undersized los yog puas conductors

Loos terminations

Sib koom circuits nrog hnyav loads

Cov hlua txuas ntxiv lossis cov hlua fais fab siv dhau lawv lub hom phiaj

Implemented loads nyob rau hauv peb -theem systems

Kev laus panels, breakers, los yog receptacles

Luv - nyob txawv txav yog qhov qub. Rov ua dua - cov tsos mob tsis tshua muaj hluav taws xob, hluav taws kub hnyiab, buzzing vaj huam sib luag, lub qhov cub kub, lossis flickering uas cuam tshuam rau ntau lub voj voog yuav tsum tau kho thiab kuaj xyuas los ntawm ib tus kws kho hluav taws xob uas muaj ntawv tso cai lossis cov khoom siv hluav taws xob, nyob ntawm seb qhov teeb meem tshwm sim.

US voltage thiab cov khoom siv thoob ntiaj teb

Cov neeg taug kev thiab cov lag luam feem ntau nug seb lub cuab yeej tsim rau lwm lub tebchaws puas tuaj yeem siv hauv Tebchaws Meskas. Cov lus teb nyob ntawm ob leeghluav taws xobthiabzaus, tsis yog lub plug zoo li. DOE sau tseg tias Teb Chaws Asmeskas siv 110-120 V ntawm 60 Hz, thaum ntau lub teb chaws siv 220-240 V ntawm 50 Hz, yog li plug adapters ib leeg tsis daws txhua qhov teeb meem sib xws.

Ua ntej siv cov khoom siv txawv teb chaws lossis cov khoom siv mus ncig, xyuas daim ntawv teev npe lossis daim ntawv qhia lub zog:

Nrhiav input voltage.Ib daim ntawv lo uas hais tias 100-240 V feem ntau tuaj yeem lees txais US voltage yam tsis muaj qhov hloov hluav taws xob.

Tshawb xyuas zaus.Cov khoom siv cim 50/60 Hz yog hloov tau ntau dua li cov khoom tsim los tsuas yog 50 Hz.

Paub meej tias wattage lossis amperage.Siab -cov khoom siv cua sov feem ntau xav tau ntau tshaj li qhov hloov pauv me me tuaj yeem muab tau.

Txuas lub ntsaws thiab grounding.Lub cev adapter tuaj yeem haum rau lub qhov hluav taws xob, tab sis hauv av, polarization, thiab kev ntsuas tam sim no tseem ceeb.

Tsis txhob twv nrog cov motors thiab moos.Ntau zaus- cov khoom siv rhiab tuaj yeem ua haujlwm tsis raug lossis kub dhau yog tias siv rau qhov tsis raug.

Ntau lub laptop chargers niaj hnub no, lub xov tooj chargers, lub koob yees duab chargers, thiab USB fais fab khoom siv tau tsim rau ntau yam kev tawm tswv yim. Lub tshuab ziab plaub hau, kettles, cov cuab yeej hluav taws xob, cov cuab yeej kho mob, thiab cov khoom siv tshwj xeeb xav tau kev tshuaj xyuas zoo dua.

Yuav txhais li cas voltage thiab nyeem ntawv

Daim ntawv lo uas hais tias 120 V txhais tau hais tias cov cuab yeej tsim los rau lub npe US voltage ntau yam, tsis yog ib qho tseeb 120. Lub cev muaj zog sau 115 V lossis cov cuab yeej sau npe 125 V tseem tuaj yeem tsim los siv rau ntawm tus qauv 120 V ceg Circuit Court, tab sis cov chaw tsim khoom cov lus qhia yuav tsum tau tswj ib txwm.

Rau kev daws teeb meem yooj yim, lub ntsaws- hauv qhov hluav taws xob tester lossis multimeter tuaj yeem qhia seb qhov hluav taws xob zoo li txawv txav los yog qis. Txawm li cas los xij, ntsuas qhov hluav taws xob tsis zoo ib yam li kev kuaj xyuas qhov system. Ib lub voj voog yuav pom tau tias tsis muaj -load voltage tab sis sag nyob rau hauv load, thiab txaus ntshai wiring faults tej zaum yuav tsis pom tseeb los ntawm ib tug yooj yim nyeem ntawv.

Siv daim ntawv teev npe ceev no ua ntej ua qhov kev txhawj xeeb ntawm qhov hluav taws xob:

Sib piv cov ntawv nyeem ntawm ntau tshaj ib lub thawv.

Nco ntsoov seb cov tsos mob tshwm sim tsuas yog thaum lub tshuab loj pib.

Xyuas seb cov neeg zej zog puas muaj teeb meem zoo sib xws.

Tsis txhob siv cov khoom siv uas kub, kub, kub, xoob, lossis buzzing.

Hu rau lub tshuab hluav taws xob rau qhov xav tias qhov kev pab cuam -voltage teeb meem.

Hu rau tus kws kho hluav taws xob muaj ntawv tso cai rau vaj huam sib luag, ceg - Circuit Court, grounding, los yog receptacle kev txhawj xeeb.

Lub tswv yim takeaway

Teb Chaws Asmeskas cov qauv ntsuas hluav taws xob tau tsim nyob ib puag ncig tus nqi nominal, lees txais ntau yam, thiab cov kev pabcuam sib txawv. Rau ntau lub tsev, qhov ntawd txhais tau hais tias 120 V rau qhov hluav taws xob txhua hnub thiab 240 V rau cov khoom loj, ob qho tib si ntawm 60 Hz system. Rau ntau lub tsev lag luam, 208/120 V lossis 480/277 V kev pabcuam yog muaj, nyob ntawm cov khoom xav tau. Kev nkag siab txog cov kev sib txawv no pab koj xaiv cov khoom siv sib xws, paub txog qhov txawv txav, thiab paub thaum twg qhov teeb meem voltage tsim nyog tau txais kev pab.

Hu rau tam sim no