Kev ceev faj ua ntej thiab tom qab siv lub clamp saib
Ua ntej ntsuas
Ua ntej, lub clamp hom ammeter yuav tsum raug xaiv kom raug raws li hom thiab qib voltage ntawm qhov ntsuas tam sim no, thiab qhov hluav taws xob ntawm qhov ntsuas hluav taws xob yuav tsum qis dua qhov ntsuas hluav taws xob ntawm lub ntsuas hluav taws xob. Thaum ntsuas tam sim no ntawm high-voltage kab, ib tug high-voltage clamp ammeter uas phim nws voltage theem yuav tsum tau xaiv. Tsawg voltage clamp hom ammeters tsuas yog ntsuas qhov tam sim no hauv cov tshuab hluav taws xob tsawg thiab tsis tuaj yeem ntsuas qhov tam sim no hauv cov tshuab hluav taws xob siab.
Thib ob, ua ntej siv, nws yog ib qho tsim nyog yuav tsum tau kuaj xyuas qhov pom ntawm lub clamp hom ammeter kom raug. Nws yog ib qho tsim nyog yuav tsum xyuas seb qhov ntsuas hluav taws xob puas ua tau zoo, lub plhaub yuav tsum tsis muaj kev puas tsuaj, thiab tus kov yuav tsum huv thiab qhuav. Yog hais tias tus pointer tsis nyob rau hauv lub xoom txoj hauj lwm, mechanical zero adjustment yuav tsum tau ua. Lub puab tsaig ntawm lub clamp hom ammeter yuav tsum nruj nruj. Yog tias tus pointer shakes, lub puab tsaig tuaj yeem rov qhib thiab kaw dua. Yog tias tseem muaj kev co, nws yuav tsum tau ua tib zoo tshuaj xyuas, thiab yuav tsum tau them nyiaj rau kev tshem tawm cov khib nyiab thiab av ntawm lub puab tsaig ua ntej ntsuas.
Vim tias qhov xav tau ntawm clamp hom ammeters tuaj rau hauv kev sib cuag nrog lub ntsuas hluav taws xob, lawv tsis tuaj yeem ntsuas qhov tam sim no ntawm cov neeg xyuas pib liab qab. Thaum siv lub high-voltage clamp meter rau kev ntsuas, nws yuav tsum tau ua los ntawm ob tug neeg. Thaum lub sij hawm ntsuas, cov hnab looj tes insulated yuav tsum hnav, sawv ntawm ib lub hnab looj insulated, thiab lwm yam khoom siv yuav tsum tsis txhob kov los tiv thaiv luv luv los yog hauv av.
Thaum ntsuas
Ua ntej, thaum siv, tus ciaj ntswj yuav tsum tau nruj kom qhib lub puab tsaig. Muab cov hlau ntsuas nyob rau hauv nruab nrab ntawm lub puab tsaig, tom qab ntawd loosen lub wrench thiab kaw lub puab tsaig kom nruj. Yog tias muaj suab nrov ntawm qhov sib koom ua ke ntawm cov pliers, nws yuav tsum rov qhib thiab kaw dua. Yog tias tseem muaj suab nrov, qhov sib koom ua ke yuav tsum tau kho kom ntseeg tau tias kev nyeem ntawv raug. Tsis tas li ntawd, nws tsis raug tso cai rau clamp ob lub xov hlau ib txhij. Tom qab nyeem ntawv, qhib lub puab tsaig, tawm ntawm cov hlau ntsuas, thiab teeb lub iav mus rau qhov siab tshaj plaws tam sim no lossis OFF iav.
Qhov thib ob, qhov tsim nyog ntau yam ntawm clamp hom ammeter yuav tsum raug xaiv raws li qhov loj ntawm qhov ntsuas tam sim no. Qhov kev xaiv yuav tsum yog me ntsis loj dua li qhov ntsuas tam sim no. Yog tias nws tsis tuaj yeem kwv yees, txhawm rau tiv thaiv kev puas tsuaj rau lub clamp ammeter, qhov ntsuas yuav tsum pib los ntawm qhov siab tshaj plaws thiab maj mam hloov lub zog kom txog thaum qhov ntau yam haum. Nws yog nruj me ntsis txwv tsis pub hloov lub iav ntawm lub clamp ammeter thaum lub sij hawm ntsuas. Thaum hloov cov iav, ntsuas hlau yuav tsum tau muab tshem tawm ntawm lub clamp ua ntej hloov lub iav.
Thaum ntsuas tam sim no qis dua 5 amperes, txhawm rau ua kom qhov kev nyeem ntawv ntau dua, yog tias muaj kev tso cai, qhov ntsuas tam sim no nqa xaim tuaj yeem raug mob ob peb zaug thiab muab tso rau hauv lub clamp rau kev ntsuas. Nyob rau ntawm lub sijhawm no, tus nqi tam sim no ntawm cov hlau ntsuas yuav tsum sib npaug rau qhov kev nyeem ntawv tus nqi ntawm cov cuab yeej muab faib los ntawm cov xov tooj ntawm cov xov hlau tig muab tso rau hauv lub clamp.
Thaum ntsuas, yuav tsum tau saib xyuas kom muaj kev nyab xeeb ntawm txhua qhov ntawm lub cev thiab lub cev raug them. Qhov chaw nyab xeeb rau cov tshuab hluav taws xob tsawg yog 0.1-0.3 meters. Thaum ntsuas qhov tam sim no ntawm txhua theem ntawm high-voltage cables, qhov kev ncua deb ntawm lub taub hau cable yuav tsum yog tsawg kawg yog 300 millimeters, thiab cov rwb thaiv tsev yuav tsum zoo. Tsuas yog thaum qhov ntsuas tau pom tias yooj yim tuaj yeem nqa tau. Thaum soj ntsuam lub sijhawm ntawm lub moos, yuav tsum tau them nyiaj tshwj xeeb rau kev tswj kom muaj kev nyab xeeb ntawm lub taub hau thiab qhov them nyiaj. Qhov kev ncua deb ntawm ib feem ntawm tib neeg lub cev thiab qhov them nyiaj yuav tsum tsis txhob tsawg tshaj li qhov ntev ntawm lub clamp saib.
Thaum ntsuas qhov tam sim no ntawm cov hluav taws xob tsis tshua muaj hluav taws xob fusible fuses lossis kab rov tav txheej txheem qis-voltage busbars, txhua theem ntawm fusible fuses lossis busbars yuav tsum tau tiv thaiv thiab cais nrog cov ntaub ntawv rwb thaiv tsev ua ntej ntsuas kom tsis txhob ua rau theem luv luv Circuit Court. Thaum ib theem ntawm lub cable yog grounded, nws yog nruj me ntsis txwv tsis pub ntsuas los tiv thaiv cov av tawg thiab tawg los ntawm cov rwb thaiv tsev qis ntawm lub taub hau cable, uas yuav ua rau muaj kev nyab xeeb ntawm tus kheej.
Tom qab ntsuas
Tom qab kev ntsuas tiav lawm, lub clamp hom ammeter ntawm clamp hom ammeter yuav muaj qhov sib txawv ntawm qhov ntsuas tus nqi thiab qhov tseeb tus nqi ntsuas, lossis txawm tias tsis muaj qhov taw qhia, yog ntsuas siv cov khoom siv magnetoelectric clamp hom ammeter. Yog vim li cas yog lub taub hau ntawm magnetoelectric clamp hom ammeter txuas nrog lub kauj kauj ruam thib ob ntawm lub transformer, thiab lub taub hau voltage tau txais los ntawm cov kauj thib ob. Raws li lub hauv paus ntsiab lus ntawm electromagnetic induction, kev sib nrig sib inductance electromotive quab yuam yog E2=4.44fW Ф m. Nws tsis yog qhov nyuaj kom pom los ntawm pej xeem cov ntawv ceeb toom tias qhov loj ntawm qhov sib nrig inductance electromotive quab yuam yog ncaj qha proportional rau qhov zaus. Thaum siv hom clamp meter los ntsuas rotor tam sim no, vim qhov tsawg zaus ntawm lub rotor, qhov hluav taws xob tau txais ntawm lub taub hau 'meter' yuav tsawg dua li thaum ntsuas tib lub zog zaus tam sim no (vim tias hom 'meter' lub taub hau no yog tsim los rau AC 50Hz fais fab zaus). Qee lub sij hawm tam sim no me me heev thiab tsis tuaj yeem ua rau lub ntsiab lus rectifier nyob rau hauv lub meter taub hau conductive, yog li lub clamp meter tsis qhia los yog tus nqi qhia txawv heev ntawm tus nqi tiag tiag.
Yog hais tias ib tug electromagnetic clamp hom 'meter' raug xaiv, lub magnetic flux generated los ntawm cov ntsuas tam sim no dhau los ntawm lub meter taub hau, magnetizing lub zoo li qub thiab dynamic hlau daim hlau ntawm lub taub hau 'meter', thiab ua rau lub pointer deflect, uas tsis muaj feem xyuam rau lub zaus ntawm. ntsuas tam sim no. Yog li ntawd, tus nqi ntawm rotor tam sim no tuaj yeem qhia tau raug.
(2) Thaum ntsuas peb-theem sib npaug load nrog lub clamp zoo li lub ammeter, qhov taw qhia tam sim no tus nqi thaum muab ob theem xaim nyob rau hauv lub clamp yog tib yam li tus nqi tam sim no thaum muab ib theem. Thaum ntsuas peb-theem sib npaug loads nrog lub clamp hom ammeter, ib qho txawv txav tshwm sim, uas yog, tus nqi qhia thaum ob theem xaim nyob rau hauv lub clamp yog tib yam li tus nqi qhia thaum ib theem xaim raug muab tso rau. Qhov no yog vim hais tias nyob rau hauv peb-theem sib npaug load Circuit Court, tus nqi tam sim no ntawm txhua theem yog sib npaug, thiab cov qauv hauv qab no yog siv los sawv cev Iu=Iv=Iw. Yog hais tias ib theem neeg xyuas pib muab tso rau hauv lub clamp, lub clamp meter qhia tus nqi tam sim no ntawm theem ntawd. Thaum ob theem conductors muab tso rau hauv lub clamp, tus nqi qhia los ntawm lub 'meter' yog qhov tseeb ntawm cov theem ntawm ob theem tam sim no. Raws li lub hauv paus ntsiab lus ntawm kev ntxiv theem kom muaj nuj nqis, I1 ntxiv rau I 3=- I2, yog li cov nqi qhia tau zoo ib yam li thaum muab tso rau theem.
Yog hais tias peb theem ib txhij muab tso rau hauv lub puab tsaig, thaum peb-theem load yog sib npaug, I1 ntxiv rau I2 ntxiv rau kuv 3=0, uas yog, kev nyeem ntawv ntawm lub clamp ammeter yog xoom.
