Tus qauv thiab kev ua hauj lwm hauv paus ntsiab lus ntawm pointer hom clamp pointer meter
Clamp ammeters feem ntau tuaj yeem muab faib ua ob pawg: magnetoelectric thiab electromagnetic. Ntawm lawv, ib qho uas ntsuas lub zog zaus hloov pauv tam sim no yog hom magnetoelectric, thaum hom electromagnetic yog ob qho tib si AC thiab DC. Kab lus no tsuas yog qhia txog kev ntsuas txoj cai thiab siv txoj kev ntawm magnetoelectric clamp ammeter.
1.Magnetic clamp ammeter qauv
Lub magnetoelectric clamp ammeter yog tsim los ntawm ib qho tshwj xeeb tam sim no transformer, ib tug rectifier magnetoelectric ammeter thiab sab hauv circuits. Feem ntau cov qauv yog: T301 hom thiab T302 hom. Lub T301 hom clamp ammeter tsuas tuaj yeem ntsuas AC tam sim no, thaum T302 hom tuaj yeem ntsuas AC tam sim no thiab AC voltage. Kuj tseem muaj hnab tshos clamp ammeters rau AC thiab DC, xws li MG20, MG26, MG36 thiab lwm yam qauv.
2. Txoj haujlwm ua haujlwm ntawm clamp ammeter
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub clamp ammeter yog ua raws li kev ua haujlwm ntawm lub tshuab hloov tam sim no. Thaum lub clamp ammeter wrench tuav nruj, cov tub ntxhais ntawm tam sim no transformer tuaj yeem qhib, thiab cov hlau ntawm cov ntsuas tam sim no nkag mus rau sab hauv lub puab tsaig raws li kev sib koom ua ke tam sim no. thawj winding ntawm lub cuab yeej. Thaum cov hlau tseem ceeb ntawm lub loosening ciaj ntswj raug kaw, ib qho induced tam sim no yog generated ntawm nws theem nrab winding raws li lub hauv paus ntsiab lus ntawm lub transformer, thiab lub ammeter pointer deflects, yog li qhia tus nqi ntawm cov ntsuas tam sim no.
Nws yog ib nqi sau cia hais tias txij li thaum nws cov ntsiab lus yog raws li nyob rau hauv lub hauv paus ntsiab lus ntawm transformer, seb cov hlau core yog nruj nreem kaw thiab seb puas muaj ib tug loj npaum li cas ntawm cov hlau nplaum residual magnetism yuav muaj kev cuam tshuam zoo rau cov kev ntsuas. Thaum ntsuas qhov me me tam sim no, qhov ntsuas qhov yuam kev yuav nce. Lub sijhawm no, cov xaim nyob rau hauv kev sim tuaj yeem raug mob nyob ib puag ncig ntawm cov tub ntxhais ob peb zaug ntxiv los hloov qhov piv ntawm tam sim no ntawm transformer kom nce qhov tam sim no. Lub sijhawm no, ntsuas tam sim no Ix yuav tsum yog:
Ix=Ia/N
Hauv cov qauv, Ia yog qhov kev nyeem ntawv ntawm ammeter; N yog tus naj npawb ntawm winding lem.
3. Yuav siv li cas clamp ammeter
(1) Xaiv lub clamp ammeter kom raug raws li hom thiab qib voltage ntawm tam sim no ntsuas. Feem ntau, rau cov kab nrog AC voltage qis dua 500 V, hom T301 yog siv. Thaum ntsuas qhov tam sim no ntawm cov kab hluav taws xob high-voltage, yuav tsum siv lub high-voltage clamp ammeter uas phim nws qhov voltage theem.
(2) Ua kom raug kuaj xyuas seb qhov pom ntawm lub clamp ammeter, qhov kaw ntawm lub puab tsaig thiab qhov xwm txheej ntawm lub taub hau meter yog qhov qub. Yog tias tus taw tes tsis nyob ntawm xoom, kev hloov kho tshuab xoom yuav tsum tau ua.
(3) Xaiv qhov tsim nyog ntawm lub clamp-hom ammeter 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 qhov loj ntawm qhov ntsuas tam sim no tsis paub, qhov siab tshaj plaws yuav tsum tau siv rau kev kwv yees ua ntej.
(4) Ntsuas kom raug. Thaum ntsuas, nias lub ciaj ntswj kom qhib lub puab tsaig. Muab cov xaim nyob rau hauv qhov kev sim rau hauv nruab nrab ntawm lub puab tsaig, loosen lub wrench thiab kaw lub puab tsaig kom nruj.
(5) Tom qab nyeem ntawv, qhib lub puab tsaig, tshem cov hlau nyob rau hauv kev sim, thiab teem lub iav mus rau qib siab tshaj tam sim no lossis OFF iav.
Ntsuas piv txwv: Ntsuas qhov kev khiav hauj lwm tam sim no ntawm lub tawb-hom asynchronous lub cev muaj zog thaum ua haujlwm. Raws li qhov loj me tam sim no, koj tuaj yeem tshawb xyuas thiab txiav txim seb lub cav puas ua haujlwm ib txwm ua kom muaj kev nyab xeeb ntawm lub cev muaj zog thiab txuas ntxiv nws lub neej kev pabcuam. Ua ntej, xaiv qhov voltage theem ntawm lub clamp-hom ammeter, xyuas seb nws cov rwb thaiv tsev puas zoo, seb nws puas puas, seb lub pointer swings flexibly, thiab seb lub puab tsaig yog xeb, thiab lwm yam. Kwv yees qhov ntsuas tam sim no raws li lub zog ntawm lub cev muaj zog. xaiv qhov ntau ntawm qhov ntsuas. Thaum ntsuas, koj tuaj yeem ntsuas ib zaug rau txhua theem lossis ib zaug rau peb theem. Lub sijhawm no, tus lej ntawm lub 'meter' yuav tsum yog xoom (vim cov lej ntawm peb theem tam sim no phasors yog xoom). Thaum muaj ob theem xaim nyob rau hauv lub clamp, lub meter yuav tso saib Tus nqi yog tus nqi tam sim no ntawm theem peb. Los ntawm kev ntsuas qhov tam sim no ntawm txhua theem, nws tuaj yeem txiav txim siab seb lub cev muaj zog yog overloaded (qhov ntsuas tam sim no tshaj qhov ntsuas tam sim no). Lub hwj chim muab hluav taws xob nyob rau hauv lub cev muaj zog los yog (ib qho khoom siv uas hloov lwm hom hluav taws xob rau hauv hluav taws xob hluav taws xob yog hu ua lub zog hluav taws xob) Puas muaj teeb meem, uas yog, txawm tias peb theem tam sim no tsis txaus siab tshaj li 10% txwv.
