Siv cov Leakage Clamp Ammeter
Lub hauv paus ntsiab lus ntawm leakage clamp ammeter:
Cov dej ntws tam sim no clamp meter yog tsim los ntawm impedance hloov dua siab tshiab, ntau yam hloov pauv, AC thiab DC hloov dua siab tshiab, kev nthuav dav, qhia cov cuab yeej, thiab lwm yam. Ib txhia kuj muaj kev tiv thaiv overcurrent, audible thiab visual alarm circuits thiab test voltage adjustment devices. Cov khoom siv qhia tau muab faib ua analog thiab digital hom. Raws li Asmeskas tus qauv UL, cov xau tam sim no yog qhov tam sim no uas tuaj yeem ua los ntawm cov khoom siv hauv tsev, suav nrog cov khoom siv hluav taws xob sib txuas. Cov dej xau tam sim no suav nrog ob ntu, ib qho yog qhov conduction tam sim no I1 los ntawm kev rwb thaiv tsev tiv thaiv; Lwm qhov yog qhov hloov pauv tam sim no I2 los ntawm kev faib cov capacitor. Lub capacitive reactance ntawm tom kawg yog XC=1/2pfc thiab inversely proportional to the power supply zaus. Lub capacitor faib tam sim no nce nrog zaus. Thiab nce, yog li cov dej ntws tam sim no nce raws li lub zog zaus nce. Piv txwv li: yog hais tias ib tug thyristor siv rau lub hwj chim mov, nws cov harmonic Cheebtsam yuav ua rau kom cov to.
Yog hais tias qhov kev ua tau zoo ntawm rwb thaiv tsev ntawm ib lub voj voog lossis lub kaw lus raug ntsuas, ntxiv rau tag nrho cov tam sim no ntws los ntawm cov khoom siv insulating rau hauv lub ntiaj teb (los yog cov khoom siv hluav taws xob sab nraud), qhov tam sim no yuav tsum suav nrog cov khoom siv hluav taws xob hauv Circuit Court lossis qhov system ( Distributed capacitance tuaj yeem suav tau tias yog lub tshuab hluav taws xob capacitive) thiab tam sim no ntws mus rau hauv lub ntiaj teb. Kev xaim ntev dua yuav tsim kom muaj peev xwm faib tau ntau dua thiab ua kom cov dej xau tam sim no, uas yuav tsum tau them nyiaj tshwj xeeb rau hauv cov tshuab tsis muaj av.
Kev ceev faj rau kev xau clamp ammeter:
1. Lub hauv paus ntsiab lus ntawm kev ntsuas qhov xau tam sim no yog ib qho zoo ib yam li cov rwb thaiv tsev tiv thaiv. Kev ntsuas rwb thaiv tsev tiv thaiv yog qhov ua tau zoo ntawm cov xau tam sim no, tab sis nws tau qhia nyob rau hauv daim ntawv ntawm kev tiv thaiv. Txawm li cas los xij, qhov kev ntsuas ntawm cov dej xau tam sim no siv qhov hluav taws xob AC, yog li cov dej ntws tam sim no muaj cov khoom siv hluav taws xob tam sim no.
2. Thaum ua qhov ntsuas hluav taws xob tiv thaiv, txhawm rau tiv thaiv cov cuab yeej ntsuas thiab ntsuas raws li cov txheej txheem kev qhia, nws tseem yuav tsum tau txiav txim siab qhov siab tshaj plaws hluav taws xob siv hluav taws xob uas tso cai rau ntws los ntawm cov khoom siv hauv kev sim (cov khoom siv insulating) yam tsis tau rhuav tshem cov cuab yeej hauv kev sim (cov khoom siv insulating). Tus nqi siab tshaj plaws tam sim no, qhov tam sim no feem ntau yog hu ua leakage tam sim no, tab sis txoj kev no tsuas yog siv nyob rau hauv lub sijhawm tshwj xeeb uas tau hais tseg saum toj no. Thov nco ntsoov qhov txawv.
3. Cov dej xau tam sim no yog qhov tam sim no ntws los ntawm cov insulating ib feem ntawm cov hluav taws xob hluav taws xob los yog cov khoom siv thaum tsis muaj qhov tsis raug thiab siv hluav taws xob. Yog li ntawd, nws yog ib qho tseem ceeb ntawm kev ntsuas qhov ntsuas hluav taws xob zoo ntawm cov khoom siv hluav taws xob, thiab nws tseem yog qhov taw qhia tseem ceeb ntawm cov khoom lag luam.
4. Lub tshuab hluav taws xob tam sim no yog siv los ntsuas qhov ua haujlwm tsis txaus ntseeg tam sim no tsim los ntawm cov khoom siv hluav taws xob ua haujlwm (lossis lwm yam khoom siv hluav taws xob) ntawm cov khoom siv hluav taws xob los ntawm kev rwb thaiv tsev lossis kev faib tawm impedance. Nws input impedance simulates impedance ntawm tib neeg lub cev.
