Qhov txawv ntawm lub tshuab thiab RCD: cov yam ntxwv tseem ceeb, qhov zoo dua rau xaiv thiab yuav ua li cas rau nruab

Cov txheej txheem:

Qhov txawv ntawm lub tshuab thiab RCD: cov yam ntxwv tseem ceeb, qhov zoo dua rau xaiv thiab yuav ua li cas rau nruab
Qhov txawv ntawm lub tshuab thiab RCD: cov yam ntxwv tseem ceeb, qhov zoo dua rau xaiv thiab yuav ua li cas rau nruab

Video: Qhov txawv ntawm lub tshuab thiab RCD: cov yam ntxwv tseem ceeb, qhov zoo dua rau xaiv thiab yuav ua li cas rau nruab

Video: Qhov txawv ntawm lub tshuab thiab RCD: cov yam ntxwv tseem ceeb, qhov zoo dua rau xaiv thiab yuav ua li cas rau nruab
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Anonim

Cov khoom siv yuav raug puas tsuaj ntawm cov xaim hluav taws xob. Txhawm rau txo qhov kev pheej hmoo ntawm kev phom sij uas tuaj yeem ua rau hluav taws xob poob siab, cov cuab yeej tiv thaiv raug teeb tsa. Cov no yog cov khoom siv hauv tsev uas tuaj yeem ua tau ntau yam haujlwm. Hauv tsab xov xwm peb yuav xav txog qhov sib txawv ntawm lub tshuab thiab RCD. Nws yuav tsum raug sau tseg tias lub tshuab sib txawv, cov cuab yeej seem tam sim no thiab cov hluav taws xob hluav taws xob tau teeb tsa hauv txoj haujlwm yuav ua rau muaj kev nyab xeeb ntawm hluav taws xob ntau. Lawv yuav ua kom ceev ceev kom tua tag nrho cov xaim hluav taws xob hauv tsev. Yog li ntawd, ib tug neeg yuav tsis tau txais hluav taws xob raug mob yog tias nws kov cov kab liab qab. Tab sis cia peb tham txog dab tsi yog qhov txawv ntawm lub tshuab thiab RCD.

Lub zog tsis ua haujlwm

Cia peb pib xav txog yam kev ua haujlwm tsis zoo tuaj yeem tshwm sim hauvhluav taws xob thaiv. Muaj ntau qhov kev puas tsuaj uas tshwm sim lawv tus kheej li hauv qab no:

  1. Ib qho luv luv uas tshwm sim thaum cov kab hluav taws xob tiv thaiv mus txog tus nqi me me. Qhov no feem ntau tshwm sim thaum shunting voltage circuits nrog cov khoom hlau.
  2. Cov dej ntws tawm tshwm sim. Lawv tshwm sim thaum lub rwb thaiv tsev tawg, nrog rau los ntawm kev raug kaw kaw rau hauv av.
  3. Ntau tshaj cov xov hlau uas tau teeb tsa hauv tsev thiab cov tsev. Yog li ntawd, ib tug loj heev tam sim no noj. Yog tias cov xaim hluav taws xob tsis tu ncua, ces cov cores nqa tam sim no pib kub heev. Nyob rau hauv cov ntaub ntawv no, cov ntaub ntawv insulating yog tas li mus rau qhov kub thiab txias, thiab vim li ntawd, nws cov khoom dielectric poob.

Yuav ua li cas yuav phem zuj zus

Tab sis txhob xav tias qhov no yog qhov phem tshaj uas tos koj. Qhov xwm txheej yuav phem dua thaum muaj kev ua haujlwm tsis zoo yog tias cov ntsiab lus hauv qab no tshwm sim:

  1. Lub tsev muaj cov kab hluav taws xob qub qub, uas muaj ntau xyoo lawm. Yog tias nws tau siv sijhawm ntev, nws yuav maj mam siv tsis tau. Thiab koj yuav tsum coj mus rau hauv tus account tias lub zog ntawm cov neeg siv khoom yog qhov siab heev. Thiab cov khoom siv hluav taws xob niaj hnub thaiv tsis zoo li tuaj yeem tiv taus ib txwm.
  2. Kev siv cov cuab yeej tiv thaiv kev puas tsuaj thiab lawv cov kev teeb tsa tsis zoo. Txawm hais tias siv txoj hlua hluav taws xob tshiab, nws yuav ua rau muaj kev ua haujlwm tsis zoo nrog rau hluav taws.
RCD difavtomat
RCD difavtomat

Yuav kom yooj yim piav qhia txog qhov sib txawv ntawm cov cuab yeej tiv thaiv yog dab tsi, peb yuavtham tsuas yog hais txog cov khoom siv uas siv nyob rau hauv ib-theem network. Nws yog ib qho tsim nyog sau cia tias cov qauv tsim los siv rau hauv peb-theem network muaj cov qauv zoo sib xws ntawm kev ua haujlwm thiab ua haujlwm raws li tib txoj cai. Nws yog ib qho tsim nyog yuav tsum ua tib zoo xav txog cov yam ntxwv ntawm kev ua haujlwm ntawm cov cuab yeej kom nkag siab tias qhov sib txawv ntawm lub tshuab thiab RCD yog dab tsi.

Circuitbreakers

Hnub no, kev lag luam tsim ntau hom hluav taws xob hluav taws xob. Lawv tuaj yeem txuag koj ob qho tib si los ntawm cov teebmeem ntawm luv luv thiab los ntawm cov cua kub tseem ceeb ntawm cov xov hlau. Tab sis nws yog ib qho tsim nyog los xav txog qhov sib txawv ntawm RCD thiab qhov sib txawv automaton, nrog rau cov qauv tsim ntawm cov khoom siv no. Txhawm rau muab kev tiv thaiv, cov ntsiab lus hauv qab no yog siv hauv kev tsim:

  1. Magnetic ceev tso coil rau kev tawg lub voj voog. Nws tso cai rau koj tshem tawm cov dej ntws uas tshwm sim thaum lub caij luv luv. Ib qho arc extinguishing system kuj tau teeb tsa ntawm no, uas tso cai rau koj kom tshem tawm lub txim uas tshwm sim thaum cov kev sib cuag qhib.
  2. Tsov tso tawm uas ua haujlwm nrog lub sijhawm ncua sijhawm. Nws yog ua los ntawm bimetallic phaj, uas tso cai rau koj tshem tawm cov overloads uas tshwm sim hauv hluav taws xob Circuit Court.

Cov kev tiv thaiv hluav taws xob tiv thaiv rau thaj chaw nyob tsuas yog suav nrog "theem" xaim, lawv tso cai rau koj tswj tau tsuas yog cov dej ntws los ntawm nws. Nws yog ib qho tsim nyog yuav tsum tau them sai sai rau qhov tseeb tias nws tsis hnov mob hauv txhua txoj hauv kev kom xau uas yuav tshwm sim thaum lub sijhawm ua haujlwm ntawm cov khoom siv.

Device raukev nyab xeeb kaw

Cov cuab yeej tiv thaiv tau teeb tsa hauv qhov tawg ntawm ob lub xov hlau - "zero" thiab "theem". Nrog kev pab los ntawm cov cuab yeej no, nws muaj peev xwm los sib piv cov dej ntws tawm hauv cov xov hlau. Tsis tas li ntawd, lub cuab yeej tuaj yeem suav tus kheej ntawm qhov sib txawv ntawm cov dej ntws. Nyob rau hauv rooj plaub thaum lub tam sim no tawm ntawm "zero" yog tib yam nyob rau hauv magnitude raws li ib tug mus rau lub "theem" xaim, lub Circuit Court tsis tua. Residual tam sim no ntaus ntawv tso cai rau nws ua hauj lwm.

Thaum muaj qhov sib txawv me me ntawm cov txiaj ntsig no uas tsis cuam tshuam rau kev nyab xeeb ntawm tib neeg, lub cuab yeej kuj tsis thaiv cov khoom siv hluav taws xob.

Sib txawv tsis siv neeg thiab ouzo sib txawv
Sib txawv tsis siv neeg thiab ouzo sib txawv

Nrog kev pab los ntawm cov khoom siv tam sim no, qhov hluav taws xob raug tshem tawm ntawm cov xov hlau uas haum rau nws, yog tias cov dej xau nrog tus nqi siab heev tshwm sim hauv Circuit Court. Qhov no yog qhov tseeb tshwj xeeb rau cov dej ntws uas tuaj yeem ua rau tib neeg noj qab haus huv lossis cov khoom siv hluav taws xob ua haujlwm hauv tsev. Txhawm rau teeb tsa cov khoom siv tam sim no, koj yuav tsum xaiv qhov kev teeb tsa tshwj xeeb tam sim no. Thaum xaiv qhov zoo tshaj plaws tus nqi, koj yuav tshem tawm cov kev mus ncig tsis tseeb, nrog rau tsim lub sijhawm rau kev ua haujlwm ruaj khov ntawm kev tiv thaiv thiab tshem tawm cov dej ntws tawm.

Tab sis tag nrho cov qauv tsim ntawm cov cuab yeej no tsis muaj kev tiv thaiv luv luv, txawm tias overloads tuaj yeem cuam tshuam kev ua haujlwm ntawm RCD. Yog li ntawd, nws yog ib qho tsim nyog los tiv thaiv lub cuab yeej nws tus kheej los ntawm luv luv Circuit Court thiab overheating ntawm cov xaim. Hauv cov hluav taws xob hluav taws xob, ib qho yooj yim tsis siv neeg Circuit Court feem ntau yog txuas nrog cov RCD.hloov.

Differential circuit breakers

Cov cuab yeej ntawm cov cuab yeej zoo li no tseem nyuaj dua li RCD lossis Circuit Court breaker. Nrog nws, nws hloov tawm kom tshem tawm txhua hom kev ua txhaum, suav nrog kev tshaj tawm, luv luv, xau. Cov no yog cov malfunctions uas yuav tshwm sim nyob rau hauv cov hluav taws xob thaiv ntawm ib chav tsev los yog lub tsev. Tus tsim ntawm lub tshuab sib txawv muaj thermal thiab electromagnetic tso tawm. Lawv tiv thaiv lub built-in residual tam sim no Circuit Court breaker.

Qhov sib txawv Circuit Court breaker yog tsim nyob rau hauv ib qho module, nws muaj kev ua haujlwm ntawm ob qho khoom siv tam sim no thiab lub Circuit Court breaker. Hauv lwm lo lus, koj tuaj yeem hloov ob zaug ib zaug nrog ib lub cuab yeej. Ua raws li cov lus hais saum toj no, cov lus xaus qhia nws tus kheej tias yuav tsum tau sib piv cov yam ntxwv ntawm ob lub ntsiab lus:

  1. Ib qho thaiv uas muaj cov khoom seem tam sim no thiab lub tshuab hluav taws xob.
  2. Differential circuit breaker.

Qhov no yog qhov tseeb tshaj plaws thiab kev sib piv ncaj ncees. Tom ntej no, peb yuav xav txog qhov sib txawv tseem ceeb ntawm RCD thiab qhov sib txawv automaton, peb yuav txheeb xyuas tag nrho cov nuances.

Dimensions

Nws yog ib qho tsim nyog sau cia tias cov khoom siv yog modular, lawv tuaj yeem ntsia tau rau ntawm din-rail, uas yuav txo tau qhov chaw xav tau rau kev teeb tsa hauv chav tsev lossis hauv ib qho hluav taws xob vaj huam sib luag. Tab sis nws yuav tsum tau muab sau tseg tias txawm xws li ib tug mus kom ze yuav tsis yeej ib txwm tshem tawm qhov tsis muaj chaw rauua kom tiav cov hlua hluav taws xob nrog lwm cov khoom siv tiv thaiv.

Dab tsi yog qhov zoo dua ouzo lossis tsis siv neeg
Dab tsi yog qhov zoo dua ouzo lossis tsis siv neeg

RCD thiab Circuit Court breaker, raws li txoj cai, yog ua rau nyias. Kev teeb tsa kuj tau ua nyias nyias. Tab sis lawv tuaj yeem ntsia tau rau tib lub tsheb ciav hlau. Raws li rau qhov sib txawv Circuit Court breaker, nws yog nyob rau hauv ib lub tsev. Hauv lwm lo lus, nws muaj ob lub cuab yeej siv ib zaug. Ua ke lawv muab kev tiv thaiv txhim khu kev qha. Qhov txawv txawv. lub tshuab thiab RCD yog qhov tseem ceeb, peb yuav tham txog lawv tom qab hauv kab lus.

Cov ntsiab lus no yuav tsum tau coj mus rau hauv tus account thaum tsim ib qho kev ua haujlwm hluav taws xob hauv tsev tshiab lossis chav tsev. Raws li qhov no, nws yog ib qho tsim nyog los xaiv cov ntaub thaiv npog, muab cov npoo me me ntawm qhov chaw, yog tias koj mam li nco dheev yuav tsum ua kom tiav lub voj voog. Tab sis thaum lub sij hawm reconstruction ntawm hluav taws xob thaiv los yog thaum lub sij hawm kho me me, hluav taws xob panels tsis yog ib txwm hloov. Yog li ntawd, qhov teeb meem ntawm qhov tsis muaj chaw nyob hauv lawv tseem nyob.

Yuav ua li cas cov khoom siv ua haujlwm

Yog tias koj ua tib zoo saib, ces lub Circuit Court breaker ua ke nrog cov khoom seem tam sim no thiab cov hluav taws xob sib txawv tso cai rau koj los daws cov teeb meem zoo sib xws. Dif. lub tshuab thiab RCD muaj qhov sib txawv tseem ceeb, tab sis cia peb tshwj xeeb. Piv txwv li, koj tuaj yeem nruab ib lub thaiv ntawm ob peb lub qhov (socket) hauv chav ua noj, uas yuav ua kom muaj zog ntau yam khoom siv, lub zog ntawm qhov sib txawv. Nws tuaj yeem yog lub tshuab ntxhua khaub ncaws, tub yees, microwave qhov cub, hluav taws xob kettle thiab lwm yam. Tag nrho cov khoom siv no txuas rau lub network randomly, lawv tsimloads nrog ib tug random variable.

Dab tsi yog qhov txawv ntawm ouzo thiab tsis siv neeg
Dab tsi yog qhov txawv ntawm ouzo thiab tsis siv neeg

Qee zaum, lub zog ntawm cov khoom siv ua haujlwm ib txhij tuaj yeem tshaj qhov ntsuas tus nqi ntawm kev tiv thaiv, uas ua rau muaj kev cuam tshuam ntau dhau. Ntxiv mus, yog tias koj muaj lub tshuab sib txawv nruab, koj yuav tau hloov nws nrog lub zog. Yog tias koj siv RCD, nws yuav txaus rau nruab ib lub tshuab hluav taws xob tshiab, tsim los rau qhov siab dua tam sim no. Tab sis qhov twg yog qhov zoo dua - RCD lossis tsis siv neeg?

Yog tias koj xav tau kev tiv thaiv ib qho khoom siv hluav taws xob tshwj xeeb uas txuas nrog ib txoj kab sib cais, ces nws tsim nyog siv lub tshuab sib txawv. Tab sis nws yuav tsum raug xaiv nruj me ntsis raws li cov yam ntxwv ntawm tus neeg siv khoom.

Yuav ua li cas rau nruab

Cia tham txog kev txuas cov khoom siv. Raws li koj nkag siab, qhov sib txawv ntawm DIN rail fasteners yog seb puas yuav tsum tau nruab ib lossis ob lub modules. Tab sis ib zaug koj tau txais mus rau cov xaim, tus nqi ntawm kev ua haujlwm hloov. Yog tias cov khoom seem tam sim no thiab dif. lub tshuab tau nruab rau hauv qhov sib txawv ntawm cov xov hlau "zero" thiab "theem", ces jumpers kuj xav tau rau lub tshuab. Lawv yuav tso cai rau koj txuas nws mus rau "theem" xaim nyob rau hauv series nrog cov khoom seem tam sim no. Qee zaum, qhov no nyuaj rau kev sib dhos ntawm tag nrho lub voj voog. Qhov sib txawv RCD kuj muaj cov khoom siv hluav taws xob zoo sib xws, yog li tus nqi ntawm cov khoom siv no siab heev.

Kev ntseeg tau thiab zoo

Ntawm cov kws paub txog hluav taws xob, muaj kev xav tias qhov kev ua tau zoo thiab ua haujlwm ntev ntawm cov cuab yeej tiv thaiv yuav nyob ntawm tsis yog xwbyuav ua li cas lawv tau sib sau ua ke ntawm lub hoobkas. Nws yog ib qho tseem ceeb heev npaum li cas txoj kev tsim ntawm lub caij no, muaj pes tsawg feem muaj nyob rau hauv nws tsim. Thiab tseem nyuaj npaum li cas los nqa thiab kho lub cuab yeej. Los ntawm qhov kev pom no, qhov sib txawv automaton yog qhov nyuaj tshaj plaws, vim tias ntau cov haujlwm yuav tsum tau ua los teeb tsa nws.

Qhov txawv ntawm ouzo thiab lub tshuab sib txawv
Qhov txawv ntawm ouzo thiab lub tshuab sib txawv

Tab sis qhov kev xav no yog qhov tsis txaus ntseeg, nws tsis yog qhov tseeb los siv nws rau txhua yam khoom siv uas tsim los ntawm kev lag luam. Qee qhov xwm txheej, lub tshuab sib txawv ua haujlwm tau zoo dua thiab muaj kev ntseeg siab ntau dua li ob ntawm cov khoom siv tam sim no thiab cov khoom siv hluav taws xob. RCD thiab difavtomat txawv, tab sis lawv tso cai rau koj ua haujlwm yuav luag zoo ib yam.

Hloov & Kho

Nws tsim nyog sau cia tias kev tawg tuaj yeem tshwm sim ntawm yuav luag txhua yam khoom siv tiv thaiv. Yog tias nws tsis tuaj yeem tshem tawm tam sim ntawd, cov cuab yeej tiv thaiv yuav ua tsis tiav. Yog li ntawd, koj yuav tau yuav ib lub cuab yeej tshiab. Tus nqi ntawm lub tshuab sib txawv yog ntau dua li cov cuab yeej seem tam sim no thiab cov khoom siv hluav taws xob yooj yim. Thiab nyob rau hauv cov xwm txheej uas koj nruab ib lub RCD thiab ib tug Circuit Court breaker, ces nyob rau hauv cov kev tshwm sim ntawm ib tug tawg ib tug ntawm cov khoom yuav tsis zoo, nws yuav tsis tsim nyog los hloov nws. Thiab qhov no yuav txo tus nqi kho kom zoo.

Differential ua
Differential ua

Nyob rau hauv qhov xwm txheej uas ib qho kev tiv thaiv ntaus ntawv (piv txwv li, ib qho kev hloov pauv tsis siv neeg) tawg, cestag nrho cov neeg siv khoom siv hluav taws xob los ntawm nws yuav tsum tau muab tua. Yog hais tias RCD yog faulty, nws raug tso cai rau shunt nws circuits thiab muab lub hwj chim tsuas yog los ntawm lub Circuit Court breaker. Raws li koj nkag siab, yog tias muaj kev ua haujlwm tsis zoo hauv lub tshuab sib txawv, ces koj yuav tsis tuaj yeem "dag" li ntawd. Koj yuav tau hloov nws nrog ib qho tshiab lossis nruab ib lub tshuab hluav taws xob tsis tu ncua rau ib lub sijhawm.

Yuav ua li cas lawv ua haujlwm sib txawv

Thiab tam sim no hais txog qhov sib txawv ntawm RCD thiab lub tshuab tsis siv neeg nyob rau hauv cov lus ntawm circuitry. Lub voj voog rau kev saib xyuas cov xau tam sim no ntawm lub tshuab sib txawv thiab cov cuab yeej seem tam sim no tuaj yeem ua tiav ntawm ntau lub hauv paus:

  1. Electromechanical relay tsim uas tsis xav tau cov khoom siv hluav taws xob ntxiv rau kev ua haujlwm ib txwm muaj.
  2. Nrog kev pab los ntawm microprocessor lossis hluav taws xob thev naus laus zis, uas yam tsis muaj kev poob qis xav tau lub zog hluav taws xob muaj peev xwm xa cov hluav taws xob ruaj khov.

Yog tias cov xov hlau haum rau cov khoom siv tau zoo, ces lawv ua haujlwm yuav luag zoo ib yam. Tab sis yog hais tias malfunctions tshwm nyob rau hauv lub Circuit Court, piv txwv li, kev sib cuag ntawm ib tug hlau ("zero") so, ces koj tam sim ntawd pom qhov zoo ntawm cov qauv tsim raws li lub relay Circuit Court. Nws tseem yuav tsum tau muab sau tseg tias lawv muaj kev ntseeg siab dua thiab ua haujlwm zoo dua hauv cov kab hluav taws xob ob-xaim dhau lawm.

Yuav ua li cas thiaj txiav txim siab qhov ua rau kev tiv thaiv

Thaum RCD tshwm sim, koj tuaj yeem nkag siab tam sim ntawd tias cov dej ntws tawm tau tshwm sim hauv daim duab thaiv, yog li koj yuav tsum tauxyuas qhov xwm txheej thiab qhov zoo ntawm cov rwb thaiv tsev ntawm thaj chaw uas muaj kev tiv thaiv los ntawm lub cuab yeej. Thaum lub Circuit Court breaker mus ncig ua si, nws tuaj yeem nkag siab tias yog vim li cas vim li cas thiaj li muaj kev cuam tshuam ntau dhau ntawm Circuit Court lossis luv Circuit Court. Tab sis yog tias lub tshuab sib txawv raug muab tua, ces nws yuav siv sij hawm ntev dua los tshawb nrhiav qhov ua rau ntawm qhov tshwm sim no. Raws li koj tuaj yeem pom, qhov sib txawv ntawm RCD thiab lub tshuab sib txawv yog qhov loj - nws yog ib qho nyuaj rau nrhiav tau qhov ua rau ntawm qhov tawg nyob rau tom kawg.

Qhov txawv ntawm lub tshuab tsis siv neeg thiab ouzo
Qhov txawv ntawm lub tshuab tsis siv neeg thiab ouzo

Thiab koj yuav tsum ua tib zoo nkag siab ob qho tib si rwb thaiv tsev tiv thaiv thiab cov khoom thauj uas tau tsim hauv lub network. Nws yog yuav luag tsis yooj yim sua kom tam sim ntawd txheeb xyuas qhov ua rau ntawm kev ua haujlwm, koj tsuas tuaj yeem kwv yees. Tab sis hnub no koj tuaj yeem pom cov qauv kim ntawm qhov sib txawv automata ntawm kev muag, ntawm qhov ntsuas twg tau teeb tsa lub teeb liab vim li cas kev tiv thaiv ua haujlwm.

Nkauj ntawm rooj plaub

Thiab tam sim no xav txog qhov sib txawv. tsis siv neeg thiab RCD. Dab tsi yog qhov txawv ntawm cov cuab yeej no. Cov xwm txheej ntawm lub tshuab sib txawv thiab cov cuab yeej seem tam sim no zoo ib yam, yog li ntawd, lawv muaj qhov zoo ib yam, muaj lub zog rau kev tuav tes, lub pob ntawv sau "Test", lub davhlau ya nyob twg thaiv rau kev sib txuas ntawm cov xov hlau kuj zoo ib yam. Tab sis koj tuaj yeem paub qhov txawv ntawm lawv los ntawm cov ntawv sau thiab cov duab kos uas muaj nyob rau sab xub ntiag. Nco ntsoov qhia rau ntawm daim phiaj ntawm cov khoom siv hluav taws xob uas thauj cov nqi \u200b\u200bare nominal.

Nws kuj yog qhov yuav tsum tau qhia tias qhov dej ntws tam sim no tuaj yeem saib xyuas, qhov hluav taws xob hauv cov xaim, nrog rau daim duab txuasInternal Cheebtsam ntawm qhov ntsuas. Nws yog qhov yuav tsum tau ua kom pom qhov sib txawv tam sim no transformer raug tswj.

Tsis muaj kev tiv thaiv tam sim no hauv cov khoom seem tam sim no, yog li nws tsis pom ntawm daim duab. Raws li rau lub tshuab sib txawv, nws yog tam sim no nyob rau hauv nws tsim, yog li nws yuav tsum tau qhia rau ntawm rooj plaub. Qhov txawv ntawm RCD thiab lub tshuab tsis siv neeg yog dab tsi - tam sim no koj paub, nws tseem tsuas yog xaiv qhov tsim nyog rau koj.

Raws li rau cov cuab yeej tsim los ntawm kev lag luam hauv tsev, lawv tau cim rau hauv txoj hauv kev uas tus neeg yuav khoom tuaj yeem taug kev lawv tus kheej. Ncaj nraim ntawm rooj plaub, hauv qhov chaw tseem ceeb tshaj plaws, nws tau qhia tias lub cuab yeej yog qhov sib txawv. tsis siv neeg. Nyob rau hauv cov ntaub ntawv ntawm ib tug residual cuab tam tam sim no, lub cim no yog nyob rau ntawm phab ntsa tom qab.

"VD" txhais tau tias nws yog qhov sib txawv. Nws yog ib nqi sau cia hais tias los ntawm ib tug technical point ntawm view, qhov no yog qhov tseeb xaiv xaiv. Cov cuab yeej no tsuas yog teb rau cov xau tam sim no, tab sis tsis tiv thaiv overcurrent lossis luv Circuit Court. Raws li txoj cai, cov cuab yeej tiv thaiv kaw tau cim nrog cov ntawv zoo li no. Kuj tseem muaj cov ntawv luv "AVDT". Nws hais tias tus qauv tsim muaj lub tshuab hluav taws xob. Hais lus nruj me ntsis, qhov no yog qhov sib txawv automaton. Yog li ntawd, yog tias koj txiav txim siab xaiv dab tsi - RCD lossis tsis siv neeg, muab qhov sib txawv zoo dua. Txawm hais tias nws kim dua, nws tseem niaj hnub thiab siv tau.

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