Txiav txim lub rwb thaiv tsev tsis kam ntawm cov xov hlau lossis cov khoom siv hluav taws xob nrog multimeter.
Lub npe-hu ua Hlau towb tau txhais tau hais tias lub rwb thaiv tsev tsis kam ntawm cov xov tooj los yog cov khoom siv hluav taws xob tsis tuaj yeem ua haujlwm rau ntau yam, ua rau tus neeg saib xyuas hluav taws xob thiab lub ntiaj teb. Rau qee kis uas cov rwb thaiv tsev tsis kam lees tus nqi yog sib npaug rau xoom, nws tsis yog qhov xau yooj yim, tab sis sib npaug rau lub sijhawm luv luv.
Ntawm no, Kuv yuav qhia cov tswv yim ntawm rwb thaiv tsev tsis kam; Qhov thiaj li hu ua rwb thaiv tsev yog siv cov tshuaj tsis raug coj los cais lossis qhwv lub cev uas muaj ntau lub zog voltage. Lub luag haujlwm ntawm rwb thaiv tsev; Ua kom muaj kev nyab xeeb ua haujlwm ntawm cov khoom siv hluav taws xob thiab cov kab hluav taws xob hluav taws xob thiab tiv thaiv kev sib raug zoo ntawm tus kheej.
Rwb thaiv tsev tsis kam yog txhais raws li; Kuj muaj nqi ntawm insaction txheej txheej ntawm cov khoom hluav taws xob hauv DC voltage. Tsis muaj qee qhov "insulating" tshuaj nyob hauv lub ntiaj teb. Yog hais tias lub dc voltage yog thov thoob plaws cov tshuaj insulating, yuav muaj ib txwm ntws los ntawm nruab nrab, tsuas yog qhov hluav taws xob. Defishectric tam sim no tau muab faib ua cov to taub tam sim no (xau tam sim no, Polarization capacitance tam sim no).
Here, simply speaking, the leakage grounding current of wires is related to the moisture and aging of insulating materials. Qhov ntau ntawm cov toast tam sim no yog cuam tshuam nrog kev siv voltage. Qhov ntau dua qhov hluav taws xob, qhov ntau dua cov xau dej tam sim no. Lawv cov volt-ampes yog tsis yog linear.
Seb nws yog digital motionimeter lossis pointer multimeter, lawv yog cov pab ntsuas ntsuas ntsuas cov cuab yeej siv. Nruj me ntsis kev hais lus, pululation tsis tau ntsuas qhov xau dej ntawm cov xov hlau. Qhov tseeb, pulle animeter tsuas yog ua tus txiav txim siab ua ntej rau cov khoom siv hluav taws xob lossis cov khoom siv hluav taws xob thiab txawm tias muaj dej xau hauv lub plhaub. Nyob rau lub sijhawm no, pullidimeter yog sib npaug rau lub tshuab hluav taws xob.
Seb puas muaj hluav taws xob xau rau hauv cov kab xaim lossis cov khoom siv hluav taws xob yuav tsum tau ntsuas los ntawm megger. Feem ntau siv moeghmmeters yog 25 0 v, 500v thiab 1000V. Ntev npaum li tus megger yog shaken ntawm qhov ceev ntawm 120 ib feeb thiab nws rwb thaiv tsev tsis kam>
Tsis txhob xav tias multatatent yog omnipotent. Qhov dav dav ntau sib xyaw ua rau roj teeb 1.5v thiab 9V laminated roj teeb. Nws yog tsis yooj yim sua kom ntsuas cov rwb thaiv tsev tsis kam ntawm ib-theem 220 v lossis peb-theem 380v hloov lwm txoj kab kev tam sim no lossis cov khoom siv hluav taws xob.
Thaum cov xwm txheej tsis pub, lub siab tiv taus tau siv los ua tus txiav txim siab ntawm cov xov hlau lossis cov khoom siv hluav taws xob, uas tsis yooj yim pom. Kev ntsuas kab hauv av lossis ntsuas qhov av tiv taus nrog kev sib txuam yog tseem muaj kev txiav txim siab ua ntej. Qhov ntsuas tiag ntawm cov av tiv thaiv yuav tsum tau ua los ntawm kev siv ib leeg-caj npab lossis ob txhais caj npab.
