Feem ntau faults thiab kev daws teeb meem ntawm clamp ammeters
Clamp hom ammeters tau muab faib ua ob hom: siab thiab tsis tshua muaj hluav taws xob, siv ncaj qha ntsuas qhov tam sim no hauv Circuit Court yam tsis muaj kev cuam tshuam hauv Circuit Court. Txoj kev siv yog raws li nram no:
(1) Thaum siv high-voltage clamp meter, yuav tsum tau them nyiaj mloog mus rau theem voltage ntawm lub clamp ammeter. Nws yog nruj me ntsis txwv tsis pub siv lub ntsuas hluav taws xob tsawg-voltage los ntsuas qhov tam sim no ntawm high-voltage circuit. Thaum siv lub high-voltage clamp meter rau kev ntsuas, nws yuav tsum tau ua los ntawm ob tug neeg. Cov neeg ua haujlwm tsis ua haujlwm yuav tsum tau sau daim ntawv thib ob ntawm daim pib ua haujlwm rau kev ntsuas. Thaum lub sij hawm ntsuas, cov hnab looj tes rwb thaiv tsev yuav tsum hnav, sawv ntsug ntawm cov ntaub thaiv npog, thiab lwm yam khoom siv yuav tsum tsis txhob kov los tiv thaiv luv luv los yog hauv av.
(2) Thaum soj ntsuam lub sijhawm ntawm lub moos, yuav tsum tau saib xyuas tshwj xeeb kom tswj tau qhov kev ncua deb 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.
(3) Thaum ntsuas ntawm high-voltage Circuit Court, nws yog txwv tsis pub txuas cov xov hlau los ntawm lub clamp ammeter mus rau lwm lub 'meter' rau kev ntsuas. 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 hli, thiab cov rwb thaiv tsev yuav tsum zoo. Tsuas yog thaum qhov ntsuas tau pom tias yooj yim tuaj yeem nqa tau.
(4) Thaum ntsuas qhov tam sim no ntawm qhov hluav taws xob qis 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 cov ntaub ntawv rwb thaiv tsev ua ntej ntsuas kom tsis txhob ua rau theem luv luv Circuit Court.
(5) Thaum ib theem ntawm lub cable yog grounded, ntsuas yog nruj me ntsis txwv tsis pub. Txhawm rau tiv thaiv qhov tshwm sim hauv av tawg thiab tawg vim qhov hluav taws xob qis ntawm lub taub hau cable, uas yuav ua rau muaj kev phom sij rau tus kheej.
(6) Tom qab ntsuas lub clamp ammeter tiav, tig qhov hloov mus rau qhov siab tshaj plaws txoj hauj lwm kom tsis txhob muaj kev sib tsoo overcurrent thaum siv tom ntej; Thiab yuav tsum tau muab cia rau hauv tsev hauv qhov chaw qhuav.
Kev daws ntawm Clamping Ammeter
(1) Thaum ntsuas tam sim no lossis qhov hluav taws xob, muaj ib lossis ob peb lub zog uas tsis muaj kev qhia, thaum lwm lub zog muaj qhov qhia tau zoo. Yog vim li cas yog tias lub fastening hloov ntsia hlau ntawm lub clamp hom hluav taws xob ntsuas yog xoob, los yog cov xaim ntawm nws ceg hloov yog twisted thiab tawg. Hom kev ua txhaum no yog feem ntau, tsuas yog txuas cov hlau tawg tom qab qhib lub hau.
(2) Kev nyeem ntawv tam sim no tsawg dhau, thaum lub zog nyeem ntawv yog qhov qub. Yog vim li cas rau qhov no feem ntau yog vim kev sib cuag tsis zoo ntawm lub puab tsaig thiab cov hlau nplaum ntau dhau. Nws yog ib qho tsim nyog los kho lub puab tsaig kom ntseeg tau tias kev sib cuag zoo. Hom kev ua txhaum no qee zaum tshwm sim los ntawm qhov luv luv ntawm windings, uas tuaj yeem ua teeb meem heev. Feem ntau, nws yog ib qho tsim nyog yuav tsum rov qab ua raws li cov ntaub ntawv qub thiab ua rau kev laus.
(3) Kev nyeem ntawv tam sim no thiab qhov ntsuas hluav taws xob tsawg, uas feem ntau tshwm sim nyob rau hauv cov hlau nplaum clamp hom meters. Yog vim li cas yog cov hlau nplaum demagnetizes thiab feem ntau yuav tsum tau magnetized los daws qhov teeb meem. Nws kuj tuaj yeem hloov kho los ntawm kev txo tus nqi tsis kam nyob rau hauv series nrog lub meter ceg.
(4) Yog tias ib qho ntawm cov kev nyeem tsis raug, qhov sib thooj yuav tsum tau hloov kho.
(5) Qhov ntsuas qhov ntsuas hluav taws xob yog qhov qub, tab sis txhua qib tam sim no tsis qhia. Siv ib tug multimeter
Txheeb xyuas qhov hloov pauv thawj zaug thiab theem nrab winding rau tej yam txawv txav.
(6) Tsis muaj qhov taw qhia kiag li. Lub rectifier diode, meter lub taub hau, hloov, thiab xaim txuas nrog lossis cuam tshuam nrog lub ntsuas ntsuas clamp yuav tsum raug kuaj xyuas kom muaj kev tawg.
