Hluav taws xob ntsuas hluav taws xob feem ntau hu ua "electricity meters", los yog yooj yim "electric meters", thiab yog siv los ntsuas cov nqi zog ntawm hluav taws xob. Raws li tus naj npawb ntawm ntsuas AC fais fab theem, muaj ob hom ib-theem thiab peb-theem. Niaj hnub no, cia peb tham txog ib theem zog ntsuas.
Xaiv qhov tsawg-voltage ib-theem hluav taws xob hluav taws xob ntsuas
Mantra:
Kev siv hluav taws xob hluav taws xob yuav tsum raug suav, thiab cov ntsuas hluav taws xob tsis tas yuav tsum muaj.
Tus nqi tso tawm yog kWh, thiab cov neeg feem ntau hu nws degree.
Txhawm rau xam qhov kev siv hluav taws xob tag nrho, muab tag nrho cov kilowatts los ntawm tsib.
Xaiv tus nqi tam sim no ntawm lub 'meter', peb zaug ntawm kilowatt tuaj yeem txaus siab.
Muaj ob lub cim tam sim no, ib qho nyob rau hauv thiab sab nraum lub brackets.
Muaj ntau ntau ntawm sab nraud mus rau sab hauv, los ntawm ob npaug rau plaub fab.
Tus nqi calibration yog sab nraum lub brackets, thiab tus lej overcurrent yog nyob rau hauv lub brackets.
Feem ntau siv tus nqi calibration, thiab siv lub overcurrent nrog ib tug degree.
Nqe lus piav qhia:
(1) Taw qhia rau lub ntsuas hluav taws xob
Ib-theem hluav taws xob hluav taws xob ntsuas hluav taws xob yog cov khoom siv hluav taws xob siv hluav taws xob ntau tshaj plaws, uas yog siv los ntsuas cov nqi hluav taws xob nquag ntawm hluav taws xob. Hauv peb lub tebchaws, tej zaum muaj ntau tshaj li ntau pua lab tus siv. Qhov ntsuas no feem ntau hu ua "electricity meter", lossis tsuas yog "electric meter".
Muaj ob hom kev ntsuas hluav taws xob loj: cov khoom siv hluav taws xob ib txwm siv hluav taws xob thiab cov khoom siv hluav taws xob tshiab digital. Tsis tas li ntawd, muaj ntau yam xws li daim npav nkag thiab hom kev them nyiaj ua ntej.
Chav tsev ntawm kev siv hluav taws xob tso tawm los ntawm lub ntsuas hluav taws xob yog kilowatt teev, uas yog hu ua "kW · h" nrog lub cim, feem ntau hu ua "degree", uas yog, 1 kilowatt teev yog 1 degree. 1 kilowatt-teev yog lub zog siv los ntawm cov khoom siv hluav taws xob nrog lub zog ntawm 1 kilowatt (kW) rau 1 teev (h).
Thaum lub zog siv hluav taws xob ntawm cov khoom siv hluav taws xob yog qhov tsis muaj zog, lub zog hluav taws xob A (kW • h) tau noj nyob rau lub sijhawm t (h) sib npaug rau qhov voltage U (V) thiab tam sim no I (A) ntws hla. nws Thiab cov khoom ntawm lub hwj chim-on lub sij hawm t (h), ie
A=Uit (W • h)=Uit / 1000 (kW • h)
(2) Lub hauv paus rau kev xaiv hluav taws xob ntsuas hluav taws xob
Muaj ob qho laj thawj rau kev xaiv lub ntsuas hluav taws xob: ib qho yog qhov ntsuas hluav taws xob, thiab lwm qhov yog qhov ntsuas tam sim no (feem ntau hu ua calibration tam sim no). Tuam Tshoj ib-theem fais fab mov voltage feem ntau yog 220V, yog li qhov ntsuas hluav taws xob ntawm lub ntsuas hluav taws xob yuav tsum yog 220V. Kev xaiv ntawm cov ntsuas tam sim no yuav tsum yog raws li tag nrho cov nqi tam sim no ntawm cov khoom siv fais fab. Qhov ntsuas tam sim no ntsuas los ntawm lub ntsuas hluav taws xob yuav tsum tsis txhob tsawg dua li tag nrho cov nqi tam sim no, tab sis txhawm rau kom ntseeg tau qhov tseeb ntawm qhov ntsuas, nws yuav tsum tsis txhob siab tshaj 4 npaug ntawm tag nrho cov nqi hluav taws xob tam sim no. Thaum cov khoom siv hluav taws xob yog tag nrho cov loads resistive, tag nrho cov nqi hluav taws xob tam sim no tuaj yeem tau los ntawm kev faib tag nrho lub zog (lub zog ua haujlwm) ntawm cov khoom siv hluav taws xob siv los ntawm cov ntsuas hluav taws xob. Thaum lub ntsuas hluav taws xob UN yog 220V thiab chav tsev ntawm lub zog PN yog kW, tag nrho tam sim no tus nqi ntawm kev siv hluav taws xob IN (A) yuav tsum yog
IZ=1000PZ / UZ=1000PN / 220≈4.4545PN≈5PN
Rau kev suav yooj yim, IZ≈5PN tuaj yeem siv.
Nyob rau hauv lub neej niaj hnub no, feem ntau ntawm cov khoom siv hluav taws xob ib-theem tsis yog ib qho kev tiv thaiv nkaus xwb. Lub sijhawm no, tag nrho tam sim no sib npaug rau tag nrho lub zog muab faib los ntawm qhov ntsuas hluav taws xob thiab tom qab ntawd muab faib los ntawm tag nrho lub zog ntawm cov hluav taws xob load cosφ (0.8 ~ 0.9), yog li Qhov tam sim no loj dua qhov txiaj ntsig suav los ntawm cov qauv saum toj no, feem ntau 10 feem pua ~ 20 feem pua loj dua. Yog li ntawd, nws yuav tsum tsim nyog los xam tag nrho cov nqi hluav taws xob tam sim no raws li 5 npaug ntawm tag nrho lub zog. Qhov no yog lub hauv paus chiv keeb ntawm "xws li tag nrho tam sim no ntawm kev siv hluav taws xob, muab tag nrho cov lej ntawm kilowatts los ntawm tsib."
Txawm li cas los xij, xav txog qhov tseeb tias txhua yam khoom siv hluav taws xob yuav tsis siv tib lub sijhawm, thiab "overload" muaj peev xwm ntawm lub zog ntsuas 4 (lossis 2) lub sijhawm ntsuas tus nqi tam sim no, txhawm rau txuag peev hauv kev yuav khoom ntawm lub zog. ' meter ', kev suav ntawm tus nqi ntawm qhov ntsuas tam sim no ntawm lub ntsuas hluav taws xob yuav tsum tsis txhob ua raws li qhov ntsuas tag nrho tam sim no tus nqi. Kev xyaum tau ua pov thawj tias peb zaug ntawm tag nrho lub zog ntawm kilowatts tuaj yeem ua tau raws li qhov yuav tsum tau ua. Qhov no yog lub hauv paus chiv keeb ntawm "xaiv tus nqi tam sim no ntawm lub 'meter', peb zaug lub kilowatt txaus siab" nyob rau hauv mantra.
Ob peb kab lus kawg ntawm mantra yog hais txog qhov teeb meem tam sim no cim los ntawm lub zog ntsuas. Muaj ob qhov tseem ceeb tam sim no cim rau ntawm lub xov tooj ntawm lub cuab yeej, ib qho yog muab tso rau hauv lub voj voog, piv txwv li 5 (20) A. Ob qhov tseem ceeb yog nyob rau hauv ntau txoj kev sib raug zoo, feem ntau yog 2 zaug lossis 4 zaug. Tus nqi sab nraud yog me me, hu ua tus nqi calibration, lossis tus nqi ntsuas, uas yog lub hauv paus tseem ceeb rau kev xaiv qhov tam sim no ntawm kev txhawb nqa Circuit Court, thiab tus nqi tam sim no los xyuas kom meej qhov tseeb thiab ib txwm ua haujlwm ntawm qhov ntsuas; tus nqi loj dua nyob rau hauv lub brackets yog hu ua qhov tso cai overcurrent Value, qhov ntsuas tuaj yeem ua haujlwm nyob rau hauv nws qhov ntau, tab sis nws qhov tseeb yuav tsis lav, thiab nws tsis haum rau kev siv mus ntev.
Txoj kev xaim ncaj qha ntawm qhov qis-voltage ib-theem hluav taws xob ntsuas hluav taws xob
Mantra:
Ib-theem hluav taws xob ntsuas nrog plaub qhov chaw nres nkoj, ib qho, ob, peb, plaub sab laug mus rau sab xis.
Ib thiab ob yog txuas nrog peb, plaub thiab xoom.
Cov khoom me me uas nyob ib sab ntawm lub davhlau ya nyob twg 1 yuav tsum tsis txhob muab tshem tawm raws li nws yog.