Chifukwa chiyani muyike SCB (Surge Circuit Breaker) kumapeto kwa SPD (Chipangizo Chotetezera)

Kodi SCB ndi chiyani?

SCB - Surge dera breaker kapena SPD yosunga zoteteza

Chifukwa chiyani SCB?

SCB yathetsa bwinobwino vuto lapadziko lonse lapansi loti mayendedwe azitetezedwa poyenda poyenda.

Kugwiritsa Ntchito Zogulitsa

Kusadulidwa kwamphamvu kwamphamvu zamagetsi zaposachedwa komanso mphezi zitha kuteteza SPD ku mayendedwe amafupipafupi komanso mayendedwe achidule a SPD chifukwa chakuchulukirachulukira kwaposachedwa, komwe kumabweretsa ngozi zazikulu zamoto.

Kugawika kwamphamvu yamagetsi yaposachedwa komanso mphezi kungateteze SPD kuti isayambitse mphamvu yamagetsi yama SPD kutsika pansi pamagetsi amagetsi, komanso kutulutsa kwa magetsi pafupipafupi kukuwonjezeka, ndikupangitsa ngozi yamoto yayikulu.

SPD ikakhala ndi mphezi, cholumikizira chakunja sichingakodwe mwangozi, kuti chitetezo chamagetsi cha zida zamagetsi nthawi zonse chizikhala bwino.

Chiwerengero cha ntchito

SCB yotetezera yotetezera imapereka chitetezo chotetezera kwa SPD (Chipangizo Choteteza Mphezi) chomwe chimateteza magetsi a gawo loyamba, lachiwiri ndi lachitatu. Amagwiritsidwa ntchito m'malo omwe zida zotetezera mphezi za SPD zakhazikitsidwa, monga zida zamagetsi zomangira mafakitale ndi zomangamanga, zamagetsi, zolumikizana, zoyendera pamsewu, petrochemical ndi mafakitale ena.

Kugwiritsa ntchito mfundo

SCB, disconnector yakunja ya SPD, ndi mtundu wa zida zomwe zimapangidwa molingana ndi nkhani ya 430.3 mu IEC61643-4-43: khalani ndi zida zotetezera zomwe zilipo pasanachitike zoopsa zoyambitsidwa ndi dera. Zimathetsa mavuto omwe kutsata mafunde kapena maulendowa akachitika mu SPD, SCB imatha kuthamangitsidwa mwachangu, pomwe mafunde amagetsi amapita, SCB siyiyenda, SCB imawonetsetsa kuti SPD siyimitsa moto komanso kuteteza zida kumatha nthawi yayitali, kuthetsa mavuto omwe ali ndi chitetezo chakhungu m'mafuseti omwe amagwiritsidwa ntchito pano omwe amagwiritsidwa ntchito ngati olumikizira kunja. SCB ndi zida zabwino zofananira zamagetsi zosinthira mtundu wa SPD, mtundu wochepetsera magetsi SPD yomwe imagwiritsa ntchito magetsi ochepa.

Padziko lonse lapansi akutenga nawo mbali kuthetsa vutoli:

Pamene kuyatsa kwa SPD kumachitika, ophulika akunja samatuluka, Ndipo kukwera kwadutsa kudzera mu SPD, zotuluka zakunja zimatuluka molakwika.

Wachijeremani adachita kuyesa kwa mphezi zomwe zimakhudza ma fuseti ndi ma breakers mu 1997. Malo obiriwira amatanthauza kulumikizana, dera lalanje limatanthauza kusatsimikizika, ndipo dera lofiira limatanthauza kuduladula.

IEC idalemba ndikukonzanso muyezo wa SPD. Sub-komiti 37A idakhazikitsa Task Force 12 pamsonkhano wa Austria-Vienna. kuthetsa vuto lofananira pakati pa ma breakers ndi SPD.

Mayiko ambiri mozungulira mawuwa adayambitsa kafukufukuyu vuto lakuchepa kwa ma MOVs (metal oxide varistors) SPD.

Kukula kwa SPD kumachitika, kuwonetsedwa kwamagetsi ndikuti U_c mtengo umachepetsa.
Pamene U_c Mtengo umachepetsa mphamvu yamagetsi, kutayikira kwamakono kukukulira kwambiri.
Mphamvu ikawoneka ngati yopanda mphamvu kwakanthawi kwakanthawi, zimapangitsa kuti SPD iyambe.
Nthawi yanthawi yopitilira 5A ikadutsa mu SPD, kuthamanga kwa poyatsira kumathamanga kuposa kutentha.

Pakadali pano zoposa 5A zimadutsa mu SPD, zimatha kugwira moto nthawi yomweyo, chifukwa chake SPD imafunikira chotetezera chomwe chimatulutsa mwachangu pomwe zopitilira 5A zimadutsa kuti zisaope moto!

Imafunikira kuti pakadali pano mphezi ipyola, siyipunthwa, zomwe zimapangitsa kuti ntchitoyo igwire bwino ntchito.

Kutha kwa SPD kumachitika kapena kusanachitike komwe kumayambitsidwa ndi mphamvu zosazolowereka zikafika ku 5A, zimatha kupunthwa mwachangu.

Kodi SCB ingathetse bwanji vutoli

Kusagwirizana pakati pazida zoteteza mphezi ndi fuse kapena breaker?

Njira yachizolowezi ndikulumikiza lama fuyusi kapena chofufumitsa m'maso patsogolo pa zida zoteteza mphezi, pangakhale mbali zinayi zosayenerera ngati zingatero.

Zipangizo zoteteza mphezi zikawonongeka kapena pakakhala ma voltage ochulukirapo m'gawo logawa, zida zoteteza mphezi sizingayende mpaka pansi ndipo ma Fuse kapena ma breakers sangathe kusiya mwachangu
Mphezi zikachitika, ma fuseti kapena ma breakers sangayime mphamvu yakanthawi kochepa ya mphezi, chifukwa adagwiritsidwa ntchito ngati zida zamagetsi pakupanga koyambirira. Chifukwa chake ndikosavuta kuwapangitsa kuti apunthwe kapena kuphulika, ndikupangitsa mphezi kuteteza.
Pamene mphezi ikudutsa ma breakers, Mtengo wa Up ndiwokwera kwambiri ndipo zida zoteteza mphezi sizitha kuteteza zida bwino.
Fuses kapena breakers sangathe kusagwirizana mu mphamvu anaika mzere wa thiransifoma. Dera lalifupi likachitika, sangathe kuthyola mwachangu.

SCB ikhoza kuthana ndi mavuto anayi nthawi imodzi

SCB, yolumikizidwa pamndandanda pamaso pa SPD itha kuthana ndi mavuto anayi nthawi imodzi.

Zida zoteteza mphezi zikachepetsa kapena pakakhala ma voltage ochulukirapo m'gawo logawa, SCB imatha kutseguka mwachangu kuti zipewe zida zoteteza mphezi pakuwombera. Kutha kwanthawi yochepera 3 A.
Pamene mphezi ikudutsa, SCB yolumikizidwa motsatizana ndi SPD imalephera kupunthwa kapena kuwonongeka pansi pa mphezi ya 100kA, zomwe zimapangitsa SPD kugwira ntchito.
Pamene mphezi ikudutsa SCB, U_p mtengo ndi wotsika kwambiri, khalani wofanana ndi mkuwa ndi kutalika komweko.
Kutha kwa SCB kumapitilira zophulika za pulasitiki, mpaka 100kA.

Pali kusiyana kwakukulu kwakanthawi ndi matalikidwe pakati pamagetsi amagetsi apano pakukula. SCB imagwiritsa ntchito bwino magawo awiriwa kuwongolera ma elekitiroma, kukwaniritsa ntchito yopunthwa.

Mukasinthana pakadali pano, ma elektromagneti amatha kudumpha mosadukiza kuti achepetse kusintha kwamakono.
Chifukwa liwiro la kuthamanga limathamanga kwambiri, mafunde amathera pomwe ma elektromagnet asanachitepo kanthu. Chifukwa chake ma electromagnet ali okhazikika ndipo SCB siyiyenda.