Txoj kev tshawb xyuas luv luv hauv circuits nrog multimeter
Los ntawm qhov kev xav ntawm kev kho hluav taws xob faults, luv Circuit Court faults muaj cov yam ntxwv hauv qab no:
1. Qhov kev tiv thaiv (lossis impedance) ntawm qhov luv luv-circuit point (piv txwv li ob qhov kawg ntawm qhov luv-circuit) yog xoom lossis zero;
2. Cov hluav taws xob luv luv muaj lub zog puas tsuaj loj, thiab ib zaug ib qho luv luv Circuit Court tshwm sim, feem ntau tsis tuaj yeem ncaj qha hluav taws xob rau kev tshuaj xyuas, tsis zoo li qhib Circuit Court faults.
Tom qab qhov kev ua txhaum luv luv tshwm sim, cov khoom tiv thaiv ntawm lub voj voog (xws li fuses, Circuit Court breakers, thiab lwm yam) ua, thiab cov khoom tiv thaiv yuav tswj tau ib cheeb tsam uas muaj ntau lub voj voog. Yog li ntawd, thaum nrhiav hluav taws xob luv luv Circuit Court faults, nws yog ib qho tsim nyog yuav tsum xub txheeb xyuas qhov faulty Circuit Court los ntawm qhov chaw faulty, thiab tom qab ntawd nrhiav qhov short circuit fault point nyob rau hauv faulty circuit.
1, Txoj Kev Tshawb Nrhiav Short Circuit Fault Circuits
Feem ntau, txoj kev multimeter tuaj yeem siv los tshawb nrhiav, thiab multimeter txoj kev yog ib txoj hauv kev los ntsuas qhov tsis kam ntawm qhov luv luv Circuit Court Circuit siv lub ohm ntau yam (kuj ntau yam) ntawm ib lub multimeter tom qab lub Circuit Court yog powered.
Piv txwv tias lub fuse FU melts, nws qhia tau hais tias ib tug luv luv Circuit Court txhaum tau tshwm sim nyob rau hauv lub cheeb tsam tiv thaiv los ntawm lub fuse, uas muaj xws li 1-3 circuits thiab lub ntsiab kab. Nrog lub hwj chim txiav, txuas lub yaj ntawm lub fuse FU thiab tso lub multimeter nyob rau hauv Ohm txoj hauj lwm "R × 10 Ω" (tsis txhob muab tso rau hauv ib tug ntau ohm ntau yam kom tsis txhob nyeem ntawv yuam kev tshwm sim los ntawm tib neeg lub cev tsis kam, thiab lwm yam), Txuas nws mus rau L thiab N terminals, thiab txiav S1, S2, thiab S3 kom txiav txhua lub voj voog. Yog hais tias lub multimeter qhia xoom tsis kam, nws qhia tau hais tias ib tug luv luv Circuit Court txhaum tau tshwm sim nyob rau hauv lub ntsiab kab.
Yog hais tias lub multimeter qhia qhov tsis kam ntawm "∞" los yog siab heev, qhov luv luv Circuit Court txhaum tshwm sim hauv Circuit Court ntawm 1 thiab 3. Kaw keyboards S1, S2, thiab S3 nyob rau hauv ib ntus. Yog hais tias lub multimeter qhia tau hais tias muaj qee tus nqi ntawm kev tiv thaiv thaum S1 thiab S2 raug kaw, thiab xoom tsis kam thaum S3 raug kaw, nws qhia tau hais tias qhov txhaum ntawm qhov chaw thib peb.
2, Txoj hauv kev los nrhiav cov ntsiab lus luv luv Circuit Court
Tom qab nrhiav tau lub short-circuit txhaum ceg, nws yuav tsum tau mus txuas ntxiv mus txiav txim qhov tshwj xeeb qhov chaw ntawm qhov txhaum point. Lub luv luv-circuit point yuav tsum nyob rau ntawm ob qho tag nrho los yog nyob rau hauv lub voltage txo Cheebtsam (xws li qhov muag teev, voltage hom coils, lub cev muaj zog windings, resistors, thiab lwm yam loads) nyob rau hauv lub Circuit Court.
Cov txheej txheem ntawm taw tes yog txiav ib qho kawg ntawm qhov hluav taws xob txo lub ntsiab R (pom hauv daim duab raws li lub teeb) thiab ntsuas qhov tsis kam ntawm 1 thiab 2 (piv txwv li ob qho tag nrho ntawm qhov hluav taws xob txo cov khoom) siv lub ntsuas hluav taws xob multimeter. Yog tias qhov tsis kam yog xoom, nws qhia tau hais tias qhov luv-circuit point yog nyob rau hauv qhov load; Yog hais tias qhov kev tiv thaiv yog ib qho nqi, nws qhia tau hais tias lub load tsis zoo nyob rau hauv thiab lub short-circuit point yog sab nraum lub load khoom. Yog tias qhov luv luv-circuit point yog sab nraud, ntsuas qhov tsis kam ntawm cov ntsiab lus 1-3. Yog hais tias tus nqi kuj yog xoom, qhov luv luv Circuit Court txhaum yog nyob nruab nrab ntawm hlau 3 thiab hlau 1.
Los ntawm kev cuam tshuam qee cov ntsiab lus ntawm cov kab no thiab ua cov kev ntsuas hauv ib ntus, nrhiav pom qhov short-circuit fault point.
