Test Application ntawm Insulation Multimeter
Thaum debugging lub AC tsav system, ib tug rwb thaiv tsev multimeter yuav tsum tau siv los ntsuam xyuas lub rwb thaiv tsev ntawm lub ntsiab Circuit Court thiab tswj Circuit Court ntawm lub inverter thiab lub cev muaj zog feem, thiaj li yuav ua kom muaj kev ruaj ntseg ntawm lub system. Fluke1587 Rwb thaiv tsev Multimeter (Daim duab 1-1) tsis tsuas yog ua haujlwm ceev thiab raug ntsuas ntawm lub ntsiab Circuit Court, tab sis kuj muab 'cov iav tiv thaiv' muaj nuj nqi rau kev ntsuas rwb thaiv tsev ntawm cov tswj Circuit Court.
1. Siv Fluke1587 rwb thaiv tsev multimeter los ntsuas qhov rwb thaiv tsev ntawm lub ntsiab Circuit Court ntawm lub inverter (coj VACONNXP ua piv txwv) thiab ua raws li cov kauj ruam hauv qab no:
(1) Tshem tawm tag nrho cov xaim hluav taws xob ntawm lub inverter thiab lub ntiaj teb sab nraud kom ntseeg tau tias lub voj voog nyob rau hauv kev sim tsis txuas nrog ib qho khoom siv hluav taws xob. Tom qab ntawd short-circuit lub input terminals L1, L2, L3 thiab cov zis terminals U, V, W, raws li qhia hauv daim duab 2-1.
(2) Ntxig qhov kev sojntsuam ntawm Fluke rwb thaiv tsev multimeter rau hauv 'plus , input davhlau ya nyob twg, thiab tom qab ntawd txuas rau lwm qhov kawg ntawm ' mus rau 'hauv av point' raws li qhia hauv daim duab 2-2.
(3) Txuas cov kev sojntsuam mus rau lub Circuit Court yuav tsum tau kuaj, thiab lub rwb thaiv tsev multimeter yuav txiav txim seb lub Circuit Court yog powered. Yog tias qhov hluav taws xob hauv Circuit Court tshaj 30Vacordcjlj qhov kev ntsuam xyuas tau txiav txim siab tsis siv neeg.
(4) Xaiv qhov 'Insulationtest' ua haujlwm ntawm Fluke1587 Insulation Multimeter.
(5) Xaiv qhov ntsuas qhov ntsuas qhov tsim nyog (500Vdc) los ntawm 'Range' khawm.
(6) Nias thiab tuav lub 'Insulationtest' khawm kom nyeem cov impedance tus nqi tso tawm rau ntawm lub rwb thaiv tsev multimeter. Nws yuav siv sij hawm li ob peb feeb rau kev nyeem ntawv kom ruaj khov. Qhov siab dua tus nqi impedance, qhov zoo dua. Lub sijhawm no, kev nyeem ntawv yog 550 megohms, thiab nws tuaj yeem txiav txim siab tias cov rwb thaiv tsev zoo. Daim duab 2-3.
(7) Txuas ntxiv tawm qhov kev sojntsuam ntawm lub rwb thaiv tsev multimeter ntawm qhov ntsuas qhov ntsuas, tom qab ntawd tso lub 'Insulationtest' khawm. Lub voj voog nyob rau hauv kev sim pib tawm los ntawm lub 'meter' kom txog thaum nws xaus.
2. Thaum ntsuas cov rwb thaiv tsev ntawm lub inverter tswj Circuit Court (noj VACONNXP cov khoom ua piv txwv), nws yuav tsum tau muab sau tseg tias qhov kev ntsuam xyuas txuas ntxiv yuav tsum tau nqa tawm nrog 'tsis kam iav' ntawm Fluke1587 rwb thaiv tsev multimeter pluaj.
3. When using an insulation multimeter to test the motor insulation, the U, V, W three-phase winding wires should be tested respectively relative to the ground wire. The general measurement value is >=5 megohms, uas txhais tau hais tias lub rwb thaiv tsev zoo.
