RCD xim: lub hauv paus ntsiab lus ntawm kev txiav txim thiab txhua yam kev

RCD (residual tam sim no ntaus ntawv) tsim los tiv thaiv kom txhob cov teeb meem los rau tib neeg thiab tsiaj txhu thaum hluav taws xob tam sim no kev sib cuag nrog nyob qhov chaw thiab lwm yam hluav taws xob pab kiag li lawm thiab nyob rau hauv voltage. Ib qho tseem ceeb muaj nuj nqi ntawm tus dais no yog tiv thaiv hluav taws thaum ib tug to tam sim no rau lub ntiaj teb. Cov kev tiv thaiv nyhuv yog disconnect tus mains raws li nram qab no:

• circuiting kws cev energized, los ntawm lub cev mus rau hauv av;
• tam sim no nqa hu hais nrog rau hauv pem tuag qhov chaw ntawm hluav taws xob rwb thaiv tsev uas ua los ntawm kev puas tsuaj;
• hloov grounding (PE) thiab nruab nrab (N) conductors nyob rau hauv qhov hluav taws xob Circuit Court.

RCD kuj tiv thaiv lub network los ntawm hwj chim surges. Rau no rau nruab nrab ntawm lub ntaus ntawv tawm tswv yim thiab tso zis rau theem kev cob cog rua non-linear kuj. Txawv tam sim no ntws los ntawm nws thaum lub voltage nce saum toj no 270, tom qab uas lub RCD yog xiam oob qhab.

Tiv pab kiag li lawm sib txawv nyob rau hauv hom thiab ua hauj lwm hauv paus ntsiab lus. Ib qho ntawm feem tswv yim yog ib tug xim RCD, muab lub hom phiaj tawm load pawg. Nws feature yog underestimated ceev kev khiav hauj lwm cov yam ntxwv (hom S los yog G). Nws yog ntsia ze mus rau qhov chaw, nws muaj ib tug me me differential dawm taw tam sim no 100 MA los yog 300 thiab kom hais tias tua nram qab no thawj pa RCD pov tseg rau tus neeg.

Yog li, cov niaj hnub tiv thaiv ntawm lub hwj chim sob yog raws li nyob rau hauv lub nrhiav kom tau ntawm tej kev yuam kev thiab lov tes taw ib tug neeg qhov chaw ntawm kev khiav hauj lwm nyob rau hauv lub qub hom tshuab.

Yuav ua li cas puas muaj tus RCD?

RCD kuj hu ua residual tam sim no Circuit Court breaker. Purpose tseem: kaw rau hauv Circuit Court thaum ib tug tam sim no to. Cov ntsiab keeb ntawm tus dais no yog ib tug toroidal transformer nrog ob peb windings ntawm cov theem thiab pes tsawg conductors muaj counter. Cov resultant magnetic teb nyob rau hauv lag luam ntawm tus dais tshua pes tsawg. To rau hauv cov av muab tshuav nyiaj li cas nyob rau hauv lub thib ob winding ib tug voltage, uas thaum xeeb muaj tej yam magnitude yog kaw cia Circuit Court ntawm tus txhais thiab Actuator.

Rau RCDs yuav tsum tau grounding rail PE. Txwv tsis pub, thaum ib tug neeg nyob rau ntawm lub lub cev ntawm lub tshuab vim hais tias ntawm puas rwb thaiv tsev, tsis muaj to tam sim no, thiab mus rau lub kov thiab lub grounded hlau qhov chaw (cua sov radiator, kav xa dej) tej zaum yuav appreciable poob siab. Nyob rau hauv cov ntaub ntawv no, tus tiv thaiv ntaus ntawv yuav ua hauj lwm, tab sis nws yuav zoo dua yog hais tias nws tsis paim quav mus rau hauv lub hauv av.

Rau txhim khu kev qha cov lag luam ntawm txoj kev ruaj ntseg ntaus ntawv yuav tsum leem rau hauv av. Nyob rau hauv lub lag luam ntawm tej Circuit Court RCD Circuit Court so ua ntej yuav kov cov hlau casing khoom los yog lub tsev rau cov khoom siv.

RCD hom

RCDs yog txwv kom muab zais los ntawm muaj nuj nqi:

• AU - teb zoo nkaus li mam li nco dheev los maj nce mus nce los ua to tam sim no.
• A - ntxiv tshuab txais los ntawm ib tug tas mus li pulsating differential tam sim no uas yuav tshwm sim mam li nco dheev los maj mam nce.
• B - teb rau AC thiab pulsating to tam sim no.
• S - xim RCD nrog ntxiv lub sij hawm-ncua dawm taw.
• G - yog zoo li S, tab sis muaj tsawg ncua.

Yuav ua li cas RCD xaiv?

Lub ripple tam sim no nyob rau hauv lub domestic puag ncig zoo nkaus li los ntawm ntxuav machines, teeb pom kev zoo dimmers, TV, computers, lub hwj chim cov cuab yeej thiab lwm tus neeg. Devices nrog switching khoom siv fais fab. Tsis muaj ntawm cais transformer nyob rau hauv ib tug thyristor tshuaj pab kiag li lawm tau ho nce qhov yuav ntawm to AC los yog pulsating tam sim no. Yog li ntawd, yog tias ua ntej lawm tias nws yog txaus muab cov hom hais lus, nws yog tam sim no tsim nyog hom A los yog B.

Qhov twg rau nruab rau hauv lub RCD?

1. Public qhov chaw nyob rau hauv vaj tse qhov twg yog tsis muaj nce kev txaus ntshai ntawm hluav taws xob poob siab.
2. Cov hluav taws xob sib txuas nrog tau txaus ntshai ntawm hluav taws xob poob siab (cov cheeb tsam uas muaj ntau tshaj li ib txwm dej cov ntsiab lus, qhov hluav taws xob pab pawg neeg, khoom siv thiab thiaj li nyob. D.).
3. Nyob rau lub ntsiab tswv yim rau kev tiv thaiv tiv thaiv hluav taws teeb meem. Feem ntau yog ib tug xim txheej RCD.
4. Hauv pem teb muab faib rau cov laug cam nyob rau hauv thaj shields, nyob rau hauv ib tug neeg lub tsev.
5. Nyob rau hauv radial fais tshuab: general RCD xim thiab hais rau diverter kab, nrog ib tug xaiv ntawm kev xaiv los xyuas kom meej xim dawm taw.
6. Nyob rau puab kev tiv thaiv ntau ntau, e.g., 10 thiab 30 MA, thiab 30 MA thiab 40 m. P. Tsis zoo li tam sim no RCD selectivity vim siab teb ceev. Rau cov qhov tseem ceeb nws yog muab, yog tias koj tuaj tos xim RCDs 100mA, hais tias muaj yog tseem lub sij hawm ncua.
7. Vim cov laus uas rwb thaiv tsev yog tsis ib txwm muaj yog ib tug gradual nce nyob rau hauv to tam sim no.
8. Thaum ib tug instantaneous nce ntawm qhov tam sim no to vim rwb thaiv tsev neej puas yuav tsav pa RCD nyob rau hauv ib theem zuj zus rau hauv cov saw. Qhov no tshwm sim vim lub ceev ceev thiab tseem ceeb overruns rau ob peb theem ntawm kev tiv thaiv.

Qhov yuav tsum tau siv xim RCD

RCD xaiv ua nws txoj kev ua hluav taws kev tiv thaiv cov kev hloov kho thaum ua ntawv thov nrog ib tug lub sij hawm ncua - S los yog G. Cov nce xav tau nyob rau hauv kuj kom luv luv circuits, switching muaj peev xwm ua, thiab dynamic thermal stability, etc ...

Feem ntau lub ntsiab hluav taws nkag mus rau mounted xyua RCD rau ib tug loj to tam sim no.

RCDs yuav siv tsis tau nyob rau hauv circuits uas tsis tau tso cai rau tua mam li nco dheev, vim qhov no tej zaum yuav ua rau muaj xwm ceev (hluav taws los yog tus tub sab tswb, txaus ntshai rau cov neeg, thiab li ntawm. P.).

Sib nrug los ntawm RCD, tam sim no muaj kev ntxub ntxaug yuav tsum muaj Circuit Court tej fais fab. Tus thawj yog ua hauj lwm los ze zog mus rau lub chaw uas ib qho overload los yog luv luv Circuit Court. Nyob rau hauv cov ntaub ntawv no, lub Circuit Court tej fais fab yog txhais ua ntej tus txhaum tam sim no nce mus txog cov kev txwv. Qhov no yog tsim nyog los tiv thaiv kom txhob overloading ntawm successively kev cob cog rua feem, txij li thaum tam sim no ntws los ntawm cov neeg ntawm tus tiv thaiv pab kiag li lawm.

Hom xim RCDs

Rau xim RCD tseem ceeb mas, tau muaj lub sij hawm mus ua hauj lwm rau hauv lub dav hom ntaus ntawv pov tseg hauv qab no lub tswvyim. Tus ntaus ntawv nrog lub sij hawm ncua mus txawv tebchaws kis tau los ntawm nws tus kheej thiab ib tug to tam sim no yog tsis txais. Qhov kev ncua luv tej zaum yuav txawv ntawm tus qauv. Rau cov khoom uas sau tias S yog 0.15-0.5 nws nrog, piv txwv li, 100mA RCD 63a xaiv, nrog rau cov tseem teem ruamqauj. Cov kev xaiv yuav qhov zoo tshaj plaws yog hais tias lawv yog ntsia tom tus nkag ntawm lub hwj chim cable ntawm cov tsev apartment. Ib txhia txawv teb chaws qauv yog lub sij hawm ncua yog txawm ntau dua. Lawv yog tsim los kaw rau hauv Circuit Court thaum qhov hluav taws kub teeb meem tshwm sim. Yog koj lov tes taw tiv thaiv, ntau dua qhov lub yuav ua rau muaj ignition ntawm kev rho tawm.

Thaum npav ntaus G ua hauj lwm nyob rau hauv ntau ntawm 0.06-0.08. Tus ntaus ntawv yog txaus ceev cov lus teb rau network cov teeb meem. Nws yuav tsum tau ntsia hauv qab no lub RCD hom S xim. Thaum lub ob-theem kev tiv thaiv nws yuav muab ntsia tau rau ntawm lub ntsiab tswv yim, txij thaum lub ceev RCD kev cob cog rua hauv qab no tseem saum toj no.

Yog hais tias muaj yog ib tug network ntawm ntau pawg ntawm loads, ib daim tiv thaiv ntaus kev cob cog nyob rau hauv pem hauv ntej ntawm txhua tus, thiab lub tswv yim - xim hluav taws RCD. Tsuas ces nws yuav de-energize thaum ib tug txhaum ntawm ib qho ntawm cov kab, thiab tus so yuav nyob twj ywm kev cob cog rua. Yog hais tias xws li ib tug tswvyim yog yooj yim mus ntes faulty sib txuas. Yog hais tias cov pa RCD yog cov los yog tsis teb rau qhov teeb meem nyob rau hauv lub Circuit Court ces ua hauj lwm xim RCD (300 MA los yog 100 MA) thiab lov tes taw rau network.

Los xyuas kom meej qhov tsim nyog selectivity nram qab no qhov chaw seev:

• teem lub teb lub sij hawm ntawm cov xim RCD, yog hais tias nws muab rau xws li ib tug tau;
• teem caij rau kev kawm txawv tebchaws tsis nyob ntawm lub qhov ntau ntawm cov to tam sim no.

RCD dawm taw yam ntxwv xim txiav txim yuav tsum ntau tshaj qhov loj tshaj plaws seem tsawg kawg 3 lub sij hawm. Tsuas yog nyob rau hauv cov ntaub ntawv no, tus ntaus ntawv yog guaranteed ua hauj lwm.

tsis RCD

Ob lub sij hawm RCD parameter txhais los ntawm Lavxias teb sab qauv:

• tawm lub sij hawm - luv los ntawm tshwm sim ntawm lub to tam sim no Δi rho tawm kom txog thaum extinction ntawm lub arc;
• lub sij hawm tsis pub tshaj rau tsis ua hauj lwm pab kiag li lawm xws li S - lub sij hawm caij nyoog nruab nrab ntawm qhov pib ntawm tshwm sim Δi thiab qhib hu.

Qhov kawg parameter lub sij lub selectivity ntawm lub RCD kev txiav txim. Nws txwv nqi 0.5 s. Nws yuav tsum tau borne nyob rau hauv lub siab hais tias kev tiv thaiv ntawm cov neeg qhib yuav tsum tshwm sim tsis pub dhau 10-30 ms, los mus tiv thaiv hluav taws rwb thaiv tsev - mus txog rau 500 ms. S xim RCD hom lug siv qhov tsim nyog los tshem tawm cuav positives ntawm tus ntawm cuam los yog hwj chim surges.

Raws li cov shutdown ceev RCD network yog muab faib raws li nram no:

• General siv - tsis muaj kev ncua;
• ntaus G - 10-40 ms;
• hom S - 40-500 ms.

Lub to currents yeej ib txwm tam sim no nyob rau hauv qhov hluav taws xob circuits. Nyob rau hauv sum, lawv yuav tsum tsis txhob muaj ntau tshaj li 1/3 ntawm cov nominal Δi ntaus ntawv. Nws yog ntseeg hais tias ib tug 1 muaj lub load ntawm 0.4 ma to tam sim no cov neeg siv, thiab 1 m ntev ntawm lub theem neeg xyuas pib - 10 Ua. Tiv ntaus adjusts magnitude ntawm tag nrho cov tam sim no ntuj to. Yog hais tias koj ua tsis tau, tej zaum yuav nquag cuav alarms. Nws yuav tsum tau borne nyob rau hauv lub siab hais tias lub tsev nrog Δi = 100 ma yuav tsis tiv thaiv ib tug neeg los ntawm hluav taws xob poob siab.

Thaum tsim hwj huam sob yuav tsis hais kom meej lub hom RCD, thaum kws txawj tsis yuav tsum tau. Tab sis mus nrhiav pov thawj lawv xaiv nyob rau hauv ua ntej yog tsim nyog. Nws yog ib qho tseem ceeb tias cov nyob tam sim no ntawm lub ntaus ntawv yog siab tshaj qhov xav pom load tam sim no. Nyob rau hauv tas li ntawd, lub RCD yog ntsia xwb nyob rau hauv ib tug khub uas muaj ib tug ntau Circuit Court-breaker. Koj yuav nruab ib lub tshuab tsis ntawm ob differential pab kiag li lawm. Nws yuav pheej yig dua, tab sis cov tsis yuav tsum tau tom zoo nyob rau hauv cov ntaub ntawv no.

RCD pab tiv thaiv kom hlau tes hauj lwm, qhov chaw uas tsis muaj kev tiv thaiv neeg xyuas pib. Tab sis nws ua hauj lwm tsuas yog tom qab kov ib tug txaus ntshai qhov chaw.

Yuav ua li cas mus xaiv cov hluav taws RCD?

Selective RCD 63A, 300mA yog feem ntau ntsia ntawm lub inlet raws li ib tug tua hluav taws.

Muaj coob tus neeg siv li ib txwm generic qauv los ntawm txhim kho kev tiv thaiv pab kiag li lawm nyob rau hauv lub tsev ntawm 30 ma. Ntawm no cov kev ua "ib nrab" selectivity yog ua vim lub loj sib txawv nruab nrab ntawm tus pickup currents. Nyob rau hauv cov ntaub ntawv no, savings rau tus nqi sib txawv. Nyob rau hauv tas li ntawd, cov pa RCD secures zoo dua vim tias ib tug ntau ceev ceev teb thaum cuab to currents. Qhov txawv nyob rau hauv tus cwj pwm ntawm lub twj paj nruag yog tias cov xim ntaus ntawv yog muab tua thaum thawj differential tam sim no sib npaug los yog ntau tshaj li 300 ma. Qhov no qhov teeb meem yog twb extraordinary, thiab muaj yog tsis muaj cov lus nug txog seb puas los yog tsis tau mus rau cov kev tswj vaj huam sib luag, uas muaj peev xwm yuav nyob rau ib txoj kev ncej. Nrog xws li ib tug loj tam sim no, tej zaum ua hauj lwm txawm qub RCDs, Yog hais tias qhov kev huam yuaj tshwm sim nyob rau hauv txoj kab. Ntawm no thiab ces nws yuav muaj tseeb rau qhov twg zoo rau qhov teeb meem.

Yog li, cov hluav taws RCD tau teem raws li ib tug xim thiab cov pa.

manufacturers RCD

Legrand Group yog lub ntiaj teb no tus zoo-paub Chaw tsim tshuaj paus ntawm hluav taws xob nyob rau hauv vaj tse. Ua txoj hauj lwm yog qhia txog lub siab tshaj plaws ntau lawm cov qauv thiab loj kev nqis peev uas nyob rau hauv tshiab hluav taws xob cov khoom. Rau Russia, cov pab pawg neeg cov khoom siv rau tag nrho cov daim ntawv teev cov hluav taws xob khoom, xws li los ntawm cov nyob thiab keyboards rau txoj kev tswj systems.

Selective RCDs Legrand yog hluav taws xob thiab electromechanical (cim nyob rau hauv vaj huam sib luag). Nyob rau hauv lub version, uas nws yog ntsia los ntawm cov sab los yog hauv qab ntawm Circuit Court tej fais fab. lub sij hawm ncua yog adjustable (nrog 0-1,3) thiab rhiab heev. Nyob rau hauv nrog tshuab phom yog siv raws li rhiab heev los yog yooj yim kev nyab xeeb kiag li lawm.

rau RCD nqi nyob twj ywm siab, zoo li lub lwm hom.

Abb fullest RCD pib ib tug series ntawm F 200 - los ntawm 16 A 125 A. Rau ib lub tsev network 63A txaus RCD, 100mA xim. By to currents rau khoom vaj khoom tsev xws li siv nyob rau hauv ib tug ntaus ntawv ntawm 30 ma. Raws li hluav taws kub tiv thaiv nyob rau hauv kev nkag mus kawm rau hauv lub private siv hauv tsev xim RCD Abb (63A, 300mA) rau ib plaub-ncej peb-theem network, raws li ib tug ntawm cov feem ntau txhim khu kev qha. Nws yog tsis inferior nyob rau hauv cov khoom uas zoo Legrand hom. Rau qhov nrog ib leeg-theem tswv yim yog ib tug bipolar ntaus ntawv. Lub yees duab hauv qab no qhia tau hais tias cov xim RCDs Abb 63A, 300mA.

Qhov siab tshaj plaws tam sim no uas lub tshuab yog tau withstand lub ntau yam ntawm 3 mus rau 10 kÅ (qhia nyob rau hauv vaj huam sib luag). Nws yog lub luv luv-lub sij hawm, es lub operating tam sim no. RCD yog tau ncua kom txog thaum lub tshuab kaw cia rau hauv Circuit Court.

Qhov ruaj yog ib tug ntawm cov leading, tab sis tus nqi yog heev. Tau txais kev pab feem ntau xav qauv ntawm Abb, vim hais tias kev ruaj ntseg yog lub kim tshaj plaws. Ua differential tsev Abb DDA200 AP-R hom A thiab AC. Nws muab ib lub sij hawm lag ntawm 10 ms, txawm hais tias nws tsis yog xim RCDs Abb. Dawm taw nkhaus yam ntxwv nws yog nyob nruab nrab ntawm cov pa thiab xim RCDs. Lub apparatus tau nce kev tiv thaiv rau cuav alarms li muab piv nrog general-lub hom phiaj pab kiag li lawm.

Feem pua ntawm cov tsis xws luag ntawm ib tug xim RCD Abb, raws li zoo raws li nyob rau lwm yam khoom, tsuas yog 2%, yog li ntawd qhov teeb meem nyob rau hauv lub chaw ua hauj lwm yog tsis tau pom. Electromechanical pab kiag li lawm considerably kev ruaj ntseg hluav taws xob thiab nyob rau hauv tag nrho cov tau zoo, tsuas yog tus nqi. Lawv twb pib tshwm RCD nrog rau hauv Actuator, tsis inferior nyob rau hauv txhua yam kev ntseeg.

Nyob rau hauv kev ua lag luam koj yuav nrhiav tau cov khoom nyob ib nrab ntawm cov nqi, tab sis qhov zoo yog tsis inferior mus Abb. Lub tuam txhab tseem ua ib tug series fh 200, uas muaj ib tug me ntsis tus nqi qis, tab sis loses considerably nyob rau hauv qhov zoo ntawm cov khoom F 200. Nyob rau hauv kev, nws tsis yog xws li ib tug txhim khu kev qha kev tiv tauj ntawm lub kho, uas sai sai pib mus dai tawm, uas yog reflected nyob rau hauv qhov zoo tshaj ntawm kev ua hauj lwm.

Yog hais tias koj tau ib tug xim RCD Abb, nws tsuas yog nyob rau hauv tshwj xeeb khw muag khoom noj, tsis nyob rau hauv dubious qhov chaw. Cuav yog txaus ntshai vim hais tias nws yuav tsis tiv thaiv tus neeg zoo. Nyob rau modular khoom, daim ntawv teev cov uas tseem tau txais RCD samopalschiki them ib tug ntau ntawm cov xim vim hais tias ntawm tus nqi.

Patriotic pab pawg neeg tuam txhab uas muag IEK ua txog 7 txhiab. Cov npe ntawm cov khoom uas hais tias tau thoob ntiaj teb cov qauv thiab los xyuas kom meej txhim khu kev qha cov lag luam ntawm lub hwj chim sob.

Mus rau RCD kom tau raws li siab yuav tsum. Nyob rau hauv ib tes, lawv yuav tsum tau khiav lag luam nti, tiv thaiv cov neeg los ntawm hluav taws xob poob siab, thiab thaiv - los ntawm tiv cav tseb teeb meem. Tab sis nyob rau tib lub pab kiag li lawm ntsia ntawm ntau ntawm hluav taws xob circuits, ua xaiv disabling ib tug neeg qhov chaw. Cov tej yam kev mob, raws li tau zoo raws li rau GOST 51326,1 hnov xim RCD hom IEK VD1 63S.

Khoom pab pawg neeg sawv cev los ntawm qhov tseem ceeb ntawm lub nominal currents ntawm 25-80 A, thiab differential currents 100 MA thiab 300 ma. Khoom cheaper dua cov loj-lub npe hom thiab yog lug siv raws li cov tswv yim pab kiag li lawm ntawm cov hluav taws. Thaum zoo li no tiv thaiv no yog muab los ntawm loj qhov ntau selectivity cutoff currents thiab lub sij hawm ncua dawm taw circuits.

Xaiv ntawm kev tiv thaiv pab kiag li lawm

Yog hais tias hluav taws xob lub hwj chim yog noj los ntawm ib tug yooj yim Circuit Court sinusoidal tam sim no ntws los ntawm lub Circuit Court. To yuav tsum zoo xws li cov daim ntawv thiab koj yuav siv lub AC-hom kiag li lawm.

Niaj hnub nimno khoom siv yog nce thov rau cov kev tswj Circuit Court cut-off theem. ntaus cov lus qhia ntaus ntawv mus rau teb rau lawv yuav tsis tau tuaj ntawm no, zoo dua yuav siv tau ib qho RCD hom A, uas kuj teb mus rau lub sinusoidal tam sim no. Cov pab kiag li lawm yuav siv tau ua ke, piv txwv li, incandescent teeb pom kev zoo tsim hom ntawm hais lus, thiab rau outlets, uas yuav tsum tau kev cob cog rua rau pab kiag li lawm nrog impulse tswj - hom A. Tiam sis yog tias koj yuav tau hloov lub teeb pom kev zoo rau lub zog-txuag teeb ci ntsa iab tswj los ntawm cov kev txiav-tawm theem, muaj kuj hloov AC ntaus ntawv hom A. Txwv tsis pub nws yuav tsis ua hauj lwm.

Nyob rau hauv thiaj li yuav cais ntau ntau actuation circuits yuav tsum tau thov xim kiag li lawm. Nyob rau nkag mus rau lub ntsiab hom set S, tus thib ob theem - G, ces tus instantaneous tripping pab kiag li lawm.

RCD xaiv ib kauj ruam siab dua nyob tam sim no tshaj li kev cob cog rua nyob rau hauv tandem nrog nws ib tug tsis siv neeg hloov uas tau khiav lag luam rau ib ntev lub sij hawm thaum tau siab tshaj load. Yog hais tias koj nkag mus rau hauv lub tshuab stands ntawm 50 A, nws yog haum rau cov xim RCDs 63A.

Raws li cov uas yuav tsum tau ntawm cov qauv, nyob rau hauv pem hauv ntej ntsuas vaj huam sib luag hais tias tus nominal tus nqi ntawm cov voltage thiab lub caij thiab switching tam sim no Δi. Yog hais tias muaj yog ib tug los ntawm ib tug sine yoj - ib hom ntawm cov lus qhia. Qhov kuaj pom hauv qab ob zoo ib nrab mus los yog hom A. Selective RCD yog S thiab G. Cov tsiaj ntawv luv luv Circuit Court nyob tam sim no yog qhia nyob rau hauv tus ncej. Tus ntaus ntawv yuav tsum tau withstand lub build-up rau ib tug tshaj plaws, kom txog thaum lub tshuab yog muab tua. Feem ntau, tam sim no tsis muaj sij hawm mus cuag cov kev txwv. RCD Circuit Court disables lub puas ua ntej twb tsis tau tshwm sim, thiab lub cua sov xyuas pib rwb thaiv tsev tau tsis cig.

xaus

Nyob rau hauv hluav taws xob tsev neeg tes hauj lwm muaj ntaub ntawv tam sim no thiab lub sij hawm selectivity. Rau lub hom phiaj no, tus tiv thaiv ntaus mounted nyob rau hauv series rau tsob ntoo daim duab, nyob rau ib mus yog heev. Lub hauv paus ntawm lub hauv paus ntsiab lus ntawm kev txiav txim yog los txo lub sij hawm ntawm tam sim no khiav los ntawm lub cev nyob rau hauv ncaj qha los yog xu hu rau hluav taws xob Cheebtsam uas yog nyob rau hauv voltage. Selective RCD yog ntsia ntawm lub nkag teb chaws thiab ua cov kev ua ntawm hluav taws.