Txoj hauv kev txhawm rau txheeb xyuas luv luv-Circuits hauv Circuits nrog Multimeter
Los ntawm qhov kev xav ntawm kev saib xyuas cov khoom siv hluav taws xob, kev ua haujlwm luv luv muaj cov yam ntxwv hauv qab no: ① Kev tiv thaiv (lossis impedance) ntawm qhov luv luv Circuit Court (nruab nrab ntawm ob qhov luv luv) yog xoom lossis ze rau xoom. ② Lub voj voog luv luv yog qhov ua rau muaj kev puas tsuaj loj heev. Thaum ib qho luv luv tshwm sim, kev tshuaj xyuas ncaj qha hluav taws xob feem ntau txwv tsis pub, uas txawv ntawm qhov qhib-circuit txhaum.
Tom qab qhov kev ua yuam kev luv luv tshwm sim, cov khoom tiv thaiv ntawm lub voj voog (xws li fuses thiab Circuit Court breakers) yuav ua haujlwm. Txij li thaum cov khoom tiv thaiv tuaj yeem tswj tau ib cheeb tsam uas muaj ntau lub voj voog, thaum nrhiav hluav taws xob luv luv-circuit tsis raug, nws yog ib qho tsim nyog yuav tsum xub txheeb xyuas lub voj faulty hauv cheeb tsam txhaum, thiab tom qab ntawd nrhiav qhov tseeb luv luv-circuit point hauv lub voj faulty.
Txoj kev los nrhiav qhov luv-Circuited Loops
Ib qho multimeter feem ntau yog siv rau lub hom phiaj no. Cov txheej txheem multimeter ntsuas qhov tsis kam ntawm lub voj luv luv nrog lub multimeter ohm ntau tom qab txiav tawm lub zog hluav taws xob.
Siv daim duab 7 ua piv txwv. Nco ntsoov tias fuse lub caij ntawm fuse FU tau tawg, qhia tias qhov kev ua txhaum luv luv tau tshwm sim hauv thaj chaw tiv thaiv los ntawm lub fuse no. Qhov chaw txhaum no suav nrog peb lub voj No. 1-3 thiab lub hauv paus ntsiab lus. Nrog lub hwj chim mov disconnected, restore lub fuse keeb ntawm FU. Teem lub multimeter mus rau "R × 10 Ω" ohm ntau yam (tsis txhob siv high-multiplier ohm ntau yam kom tsis txhob nyeem ntawv yuam kev tshwm sim los ntawm tib neeg lub cev tsis kam thiab lwm yam), thiab txuas lub multimeter hla terminals L thiab N. Tua cov keyboards S1, S2 thiab S3 kom tsis txhob cuam tshuam txhua lub voj voog. Yog hais tias lub multimeter nyeem xoom tsis kam, qhov short-circuit txhaum tshwm sim nyob rau hauv lub ntsiab lub cev Circuit Court, raws li qhia nyob rau hauv daim duab 7(a).
Yog hais tias lub multimeter qhia tau hais tias "∞" los yog ib tug loj kuj tus nqi, lub short-circuit txhaum nyob rau hauv ib tug ntawm cov loops 1-3. Kaw keyboards S1, S2 thiab S3 ib qho los ntawm ib qho. Yog hais tias lub multimeter qhia qhov tseeb tus nqi tiv thaiv thaum S1 thiab S2 raug kaw, thiab qhia xoom tsis kam thaum S3 raug kaw, qhov txhaum taw tes yog nyob rau hauv Loop 3.
