Cov lus ceeb toom ntawm Multimeter Test ntawm Transformer Insulation Resistance & Absorption Ratio
1. Tom qab tshem tawm cov khoom siv hluav taws xob thiab tag nrho cov kev sib txuas sab nraud ntawm cov khoom kuaj, cov khoom kuaj yuav tsum tau muab tso rau hauv av thiab tso tawm ua ntej, tshwj xeeb tshaj yog rau cov khoom siv loj loj (xws li transformers loj, generators, cables, thiab lwm yam), uas yuav tsum tau tso tawm tag nrho.
2. Ua ntej ntsuas, so cov av ntawm qhov chaw ntawm lub tes tsho nrog ib daim ntaub los txo qhov cuam tshuam ntawm kev ntsuas.
3. Lub megohmmeter yuav tsum tau muab tso rau kab rov tav, thiab kev tsav tsheb ntawm megohmmeter yuav tsum ncav cuag qhov ceev ceev. Ua ntej ntsuas, ua ntej ntsuas lub megohmmeter khoob. Thaum lub theem kab L qhib circuited, tus pointer yuav tsum taw tes rau "infinity". Yog tias qhov qhia tau zoo li qub, qhov kev sim tuaj yeem ua tiav. Nyob rau hauv rooj plaub uas muaj qhov cuam tshuam loj ntawm qhov rwb thaiv tsev ntawm cov qauv kuaj los yog kuaj cov khoom siv tseem ceeb, kev tiv thaiv yuav tsum tau siv kom tsis txhob muaj kev cuam tshuam ntawm qhov chaw ntawm qhov ntsuas ntsuas. Lub shielded hlau yuav tsum tau ua los ntawm mos tooj liab hlau thiab qhwv nruj nreem nyob ib ncig ntawm lub rwb thaiv tsev nto nyob ze ntawm lub theem kab kawg. Lub shielded hlau yuav tsum tsis txhob muab tso rau ze ntawm E kawg ntawm av xaim.
4. Tom qab nyeem cov rwb thaiv tsev, cov kab L ntawm cov qauv kuaj yuav tsum raug txiav ua ntej, thiab tom qab ntawd kev tsav tsheb ntawm megohmmeter (los yog DC fais fab mov ntawm megohmmeter) yuav tsum tau nres kom tsis txhob muaj cov nqi them los ntawm lub peev xwm ntawm cov qauv kuaj thaum ntsuas los ntawm kev tawm ntawm lub coil ntawm megohmmeter thiab ua rau lub megohmmeter puas. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog thaum ntsuas cov qauv ntsuas muaj peev xwm loj.
5. Ntsuas qhov ntsuas hluav taws xob tiv thaiv qhov ntsuas ntawm 15s thiab 60s, thiab tseem kaw qhov kub thiab av noo thaum ntsuas.
6. Tom qab txhua qhov kev ntsuas ntawm kev tiv thaiv rwb thaiv tsev, cov qauv ntsuas yuav tsum tau muab tso tawm tag nrho, nrog lub sij hawm tso tawm ntau dua li lub sij hawm them, thiaj li tso tawm cov nqi ntxiv. Txwv tsis pub, thaum rov ntsuas dua, vim muaj kev cuam tshuam ntawm cov nqi ntxiv, cov nqi them tam sim no thiab kev nqus yuav tsawg dua piv rau thawj qhov kev ntsuas, uas ua rau muaj qhov tshwm sim tsis tseeb ntawm kev nqus nqus piv thiab nce cov nqi hluav taws xob.
