Cia siab tiv thaiv cov cuab yeej yuav ua li cas xaiv

Raws li txhua tus paub, kev tiv thaiv cov cuab yeej tiv thaiv hluav taws xob lossis cov khoom tiv thaiv hluav taws xob tiv thaiv (SPD) tiv thaiv cov cuab yeej hluav taws xob tiv thaiv cov hluav taws xob ntau dhau los ntawm xob laim. Hais tias, nws tsis yog ib qho yooj yim uas yuav tau paub tias yuav xaiv qhov twg.

Xaiv txoj cai raug ntes mus kaw thiab cov teeb meem tiv thaiv Circuit Court koom nrog rau kev txiav txim siab txog ntau yam ntawm cov kev tiv thaiv ntawm cov khoom tiv thaiv kom tsis raug mob, kev tiv thaiv hluav taws xob, thiab kev ntsuas kev pheej hmoo.

Cia peb sim saib ntau yam ntxiv kom meej meej…

Xa daim foos, kom paub ntau ntxiv txog cov khoom siv tiv thaiv (Circuit Breaker lossis Fuse) cuam tshuam nrog Surge Tiv Thaiv Cov Cuab Yeej.

Ua ntej tshaj plaws, cov qauv tam sim no txhais tau peb pawg ntawm cov khoom siv tiv thaiv kom zoo rau kev siv hluav taws xob tsawg:

Dab tsi kev tiv thaiv cov cuab yeej tiv thaiv yuav tsum tau xaiv thiab lawv yuav tsum nruab qhov twg?

Xob laim tiv thaiv yuav tsum tau mus kom ze rau txoj kev pom dav dav. Nyob ntawm daim ntawv thov (cov nroj tsuag loj hauv cov tsev lag luam, cov chaw khaws ntaub ntawv, tsev kho mob, thiab lwm yam), yuav tsum siv txoj hauv kev txheeb xyuas qhov pheej hmoo tiv thaiv kev tiv thaiv kom zoo dua qub (kev tiv thaiv xob laim, tiv thaiv kev tiv thaiv kom zoo). Lub teb chaws cov kev cai, ntxiv mus, yuav ua rau nws yuav tsum siv raws li EN 62305-2 tus qauv (Kev Ntsuam Xyuas Kev Nyab Xeeb).

Hauv lwm qhov xwm txheej (vaj tse, chaw ua haujlwm, cov tsev tsis nkag siab txog kev pheej hmoo ntawm kev lag luam), nws yuav yooj yim dua rau kev ua raws li kev tiv thaiv hauv qab no:

Hauv txhua qhov teeb meem, ib hom 2 txheej txheem tiv thaiv tiv thaiv yuav raug nruab rau hauv lub tshuab hluav taws xob teeb tsa cov khoom lag luam hloov tshiab. Tom qab ntawd, qhov kev ncua deb ntawm qhov khoom siv tiv thaiv no thiab cov khoom siv tiv thaiv yuav tsum raug ntsuas. Thaum qhov kev ncua deb no tshaj 30 metres, yuav tsum tau nqa cov cuab yeej tiv thaiv kom hnyav ntxiv (hom 2 lossis Hom 3) yuav tsum muab ntsia ze cov cuab yeej.

Thiab sizing ntawm surge tiv thaiv?

Tom qab ntawd, sizing ntawm Type 2 surge tiv thaiv cov khoom siv feem ntau nyob ntawm thaj chaw raug (nruab nrab, nruab nrab, siab): muaj qhov sib txawv ntawm cov peev xwm sib txawv rau txhua yam ntawm cov pawg no (Kuv_max = 20, 40, 60 kA (8 / 20μs)).

Rau Hom 1 txheej tiv thaiv kev tiv thaiv, qhov tsawg kawg nkaus uas xav tau yog qhov muaj peev xwm tawm ntawm I_imp = 12.5 kA (10 / 350μs). Cov nqi ntau dua kuj yuav tsum muaj los ntawm kev txheeb xyuas qhov kev pheej hmoo thaum tom kawg thov.

Yuav ua li cas xaiv cov cuab yeej tiv thaiv cuam tshuam nrog kev tiv thaiv kev tawm tsam?

Thaum kawg, lub cuab yeej tiv thaiv cuam tshuam nrog cov khoom siv tiv thaiv kom zoo (Circuit Court breaker lossis fuse) yuav raug xaiv raws li txoj kab hluav taws xob luv tam sim no ntawm qhov chaw ntawm kev teeb tsa. Hauv lwm lo lus, rau lub chaw hloov hluav taws xob hauv chaw nyob, ib qho tiv thaiv nrog tus I_SC <6 kA yuav raug xaiv.

Rau cov ntawv thov chaw haujlwm, tus I_SC feem ntau <20 kA.

Cov neeg tsim khoom lag luam yuav tsum muab lub rooj rau kev sib koom tes ntawm cov tiv thaiv txheej txheem thiab cov cuab yeej tiv thaiv kev tiv thaiv. Ntau thiab ntau cov khoom siv tiv thaiv tiv thaiv twb tau muab cov khoom tiv thaiv no tso rau hauv tib daim ntaub thaiv.

Yooj yim los xaiv tus cai (tsis suav tag nrho cov kev ntsuam xyuas pheej hmoo)