Yuav ua li cas yog ib qho RCD

Tsis paub txog dab tsi lub RCD (residual tam sim no ntaus ntawv), los xyuas kom meej qhov muaj kev nyab xeeb lub lag luam ntawm hluav taws xob khoom siv yog ib qhov nyuaj. Koj muaj peev xwm feem ntau hnov cov dab neeg hais txog yuav ua li cas serviceable tshuab ntxhua khaub ncaws fais shocks thaum kov thaum lub sij hawm lub lag luam. Cov tib yam li cas yog tias nyob rau tib lub sij hawm kov lub cev ua hauj lwm computer thiab dab. Qhov no tshwm sim li cas muaj nyob, thiab yog tsis yog ib tug malfunction, tab sis, theej ib tug feature ntawm qhov hluav taws xob khoom tsis grounding.

Ho ua rau kom cov hluav taws xob pub RCD.

Yuav ua li cas yog ib qho RCD? Qhov no ntaus ntawv yog ib tug kev kub ceev Circuit Court breaker, uas yog raws li nyob rau hauv muab piv rau cov currents uas sib haum mus rau lub load thiab mus rov qab mus rau lub network, ua tau zoo rau qhib Circuit Court thaum tsis sib xws (differential tam sim no zoo nkaus li). Uas yog, yog tias qhov chaw nyob rau hauv lub tiv thaiv seem ntawm cov kab yog to mus rau hauv lub hauv av, tus ntaus ntawv no nws thiab de-energize txoj kab.

Xav txog lub hauv paus ntsiab ntawm lub RCD. Lub plawv ntawm tus dais no yog ib tug tam sim no transformer, kuj hu ua differential. Nws muaj peb windings: thawj (L1) thiab secondary (L2), ntsig txog, nyob rau hauv cov theem discontinuities thiab nruab nrab nyob ntawm tej, thiab lub thib peb (L3) yog kev cob cog rua rau tus txhais mechanism. Nyob rau hauv lub tiav mechanism yuav tsum muaj siab rhiab heev relay (RCD electromechanical hom) los yog hluav taws xob lub Cheebtsam, feem ntau ib tug comparator thiab ib tug amplifier (E-hom). Qhov no txhais mechanism yog mechanically coupled rau lub actuating tsav thiab lub hwj chim so hu.

Thaum lub load yog kev cob cog rua rau lub RCD los ntawm winding L1 thiab L2, ib tug tam sim no tsev. Txij li thaum nyob rau hauv lag luam tus nqi tam sim no muab rau tus neeg sib npaug zos tawm, ces lawv tag nrho sib nqus flux generated yog neutralized thiab yog pes tsawg (lub windings ze ze koj, tam sim no yog hais oppositely). Li ntawd, cov kauj L3 yog tsis muaj cov nyhuv. Hom kev lag luam ruaj hloov nyob rau tib lub sij hawm kov tib neeg lub cev mus rau hauv av thiab puas lub chav tsev nyob rau voltage. Nyob rau hauv cov ntaub ntawv no, cov theem pib (L1 winding) ib tug ntxiv tam sim no tshaj rau tam sim no winding L2. Nyob rau hauv qhov tseeb, muaj ib tug sib txawv, vim hais tias tam sim no mus rau hauv lub Circuit Court ntawm theem neeg xyuas pib, yuav mus rau hauv lub hauv av los ntawm tus neeg, thiab tsis tau rov qab mus rau lub RCD. Lub magnetic flux tshaj lub compensating kauj L1 L2 txaus txiav txim, ntsig txog, generated los ntawm cov magnetic flux tsim ib tug winding L3 me me tam sim no txaus rau cov lag luam ntawm lub relay los yog cov hluav taws xob circuitry thiab actuation ntawm lub Actuator rau rhuav lub hwj chim tiv tauj.

Ib tug txiv neej uas paub li cas lub RCD, yeej paub yuav ua li cas ua tau ib tug yooj yim daim tshev ntawm nws cov kev ua tau zoo. Nyob rau hauv cov ntaub ntawv ntawm tej RCDs qhia txog cov "Test" khawm, txhaj rau uas koj yuav ntsuam xyuas lub functionality ntawm tus dais. Nias luv luv shunts ib tug ntawm cov windings, tshem nws los ntawm lub Circuit Court generated los ntawm cov nyiaj magnetic flux, li ntawd, tus ntaus ntawv yog txhais.

Ib tug ncaj ncees lo lus nug - yuav ua li cas coj mus cuag cov RCD? Tus ntaus ntawv yuav tsum tau kev txhawb nyob rau hauv tandem nrog ib tug tsis siv neeg mus, vim hais tias nws tsis muaj lub thermal thiab electromagnetic tawm, ntsig txog, tsis tiv thaiv overload (thermal) thiab high-tam sim no luv luv-Circuit Court (SC). Txhaum tam sim no tej zaum yuav ua puas lub RCD, raws li nyob rau hauv no hom ntawm cov lag luam hauv lub to tsis tshwm sim, tab sis tam sim no tus nqi yog nce rau siab dhau heev lawm qhov tseem ceeb. Los ntawm txoj kev, qhov no yog vim li cas nws yog ib qho tseem ceeb rau xaiv thaum yuav ib tug Tshuag nrog RCD nyob tam sim no. Piv txwv li, yog hais tias tus tshuab yog npaj rau 16 Amp, lub RCD yuav tsum tsis tsawg tshaj li 25 amperes. Nyob rau hauv tej yam yooj yim cov ntsiab lus, cov nyob tam sim no ntawm lub RCD - yog permissible tam sim no rau lub Cheebtsam ntawm nws cov conductors.

Obviously, nyob rau hauv peb lub sij hawm, nws yog pab tsis tau tsuas yog kom to taub cov nqe lus nug, yog dab tsi lub RCD, tab sis kuj muaj peev xwm siv nws nyob rau hauv koj lub tsev. Tom qab tag nrho, qhov no yog ib qho ntxiv kev ruaj ntseg rau tag nrho cov neeg hauv tsev neeg.