Yuav ua li cas ntsuas seb peb-theem hluav taws xob tawm ntawm theem nrog multimeter
Peb-theem hluav taws xob theem poob txhais tau hais tias ib lossis ob ntawm peb theem kab tsis muaj hluav taws xob. Thaum cov neeg siv hluav taws xob siv hluav taws xob, yog tias tsuas yog ib theem xaim raug coj mus, thiab nws tshwm sim tias cov kab hluav taws xob theem no tawm ntawm theem, ces tus neeg siv kawg yuav muaj hluav taws xob. Yog tias nws yog cov khoom siv hluav taws xob peb-theem, nws tseem tuaj yeem siv tau tom qab ib theem ploj lawm, tab sis nws yuav ua rau tsis muaj zog voltage, uas yooj yim rau sawv los yog poob tam sim ntawd.
Hauv peb-theem hluav taws xob, qhov hluav taws xob ntawm theem kab mus rau hauv av thiab mus rau cov kab nruab nrab yog 220V. Siv cov ntaub ntawv voltage ntawm multimeter los ntsuas qhov voltage ntawm peb theem xaim thiab hauv av los yog nruab nrab xaim nyob rau hauv ib ntus. Raws li ib txwm muaj, nws yuav tsum yog li 220V. Yog tias qhov hluav taws xob yog 0 lossis qis dhau, nws ua pov thawj tias cov kab hluav taws xob yog tawm ntawm theem.
Qhov voltage ntawm cov kab theem yuav tsum yog li 380V. Ntsuas qhov voltage ntawm AB, AC, thiab BC nyob rau hauv lem. Yog tias qhov hluav taws xob tsawg dua 380V, nws ua pov thawj tias tsawg kawg ib qho ntawm ob theem ntsuas tau tawm ntawm theem.
Yuav ua li cas paub qhov txawv hauv av xaim, xoom xaim thiab nyob xaim nrog digital multimeter
Qhov sib txawv ntawm cov hlau nruab nrab thiab cov xaim hauv av tuaj yeem txawv raws li txoj kab uas hla. Feem ntau hais lus, cov xaim nruab nrab raws li cov kab hluav taws xob tseem ceeb yog tib lub thickness raws li theem xaim, thiab cov xaim hauv av kuj yog thinner. Tau kawg, qhov no tsis yog kiag li. Qhov dav dav ntawm qhov av thiab hluav taws xob xoom kab teeb tsa. Tsis tas li ntawd, peb tseem tuaj yeem siv digital multimeter los ntsuas qhov voltage ntawm ob lub xov hlau mus rau hauv av. Tus nqi hluav taws xob ntau dua yog cov xaim nruab nrab, thiab qis dua lossis xoom voltage yog cov xaim hauv av. Hauv qab no yog txoj kev ua haujlwm tshwj xeeb.
Ua ntej, peb npaj ib lub phiab dej, teem lub iav ntawm lub multimeter mus rau AC voltage iav, ces txuas ib qho ntawm cov kev xeem coj ntawm lub multimeter mus rau kab nyob rau hauv kev ntsuam xyuas, thiab muab tso rau lwm yam rau hauv dej, thiab nyeem cov nqi raws. . Tus nqi siab dua yog xoom. Tus nqi qis dua yog cov xaim hauv av.
Raws li yog vim li cas ob qho tib si kab nruab nrab thiab hauv av kab yog grounded, tab sis qhov ntsuas tus nqi ntawm lub multimeter yog siab lossis qis? Qhov no yog vim hais tias nyob rau hauv qhov tseeb Circuit Court, qhov kev ncua deb ntawm lub nruab nrab kab thiab lub hauv av davhlau ya nyob twg yog ntev, thiab muaj kab kuj nyob rau hauv txoj kab. Qhov me me voltage tus nqi peb ntsuas yog qhov tseeb qhov voltage poob ntawm kab tsis kam ntawm cov kab nruab nrab. Cov xaim hauv av yog grounded nyob ze, yog li qhov kev tiv thaiv ntawm cov xaim me dua li ntawm cov hlau nruab nrab, yog li tus nqi hluav taws xob peb ntsuas yog me dua li ntawm cov hlau nruab nrab.
