Tsawg voltage Circuit Court breaker tsis: lub sij hawm luv luv tiv thaiv tam sim no (Icw), qhov ntsuas no siv rau dab tsi?

Lub sijhawm luv luv tiv thaiv tam sim no (Icw): Muaj peev xwm ntawm aCircuit Court breakertiv taus 0.05, 0.1, 0.25, 0.5 lossis 1s yam tsis muaj kev cuam tshuam ntawm qhov muab hluav taws xob, luv-circuit tam sim no, lossis lub zog hluav taws xob.
Rated luv-lub sij hawm tiv taus tam sim no, tseem hu ua thermal stability tam sim no, yog qhov zoo tam sim no uas lub Circuit Court breaker lossis lwm yam khoom siv tuaj yeem tiv taus rau lub sijhawm luv luv.Nws qhov loj me yog sib npaug rau qhov ntsuas luv luv tam sim no thiab lub sijhawm feem ntau yog 3 lossis 4 vib nas this.

Icw yog qhov ntsuas ntsuas ntawm hluav taws xob stability thiab thermal stability ntawm Circuit Court breaker nyob rau hauv luv luv mus txawv tebchaws.Nws yog rau chav kawm B Circuit Court breaker.Feem ntau, qhov tsawg kawg nkaus VALUE ntawm Icw yog:

Thaum In≤2500A, nws yog 12In lossis 5kA,

Thaum nyob hauv> 2500A, nws yog 30kA

(Rau YUW1_2000, Icw yog 400V, 50kA; rau DW45_3200, Icw yog 400V, 65kA).

Icw ntsuas luv-lub sij hawm tiv taus tam sim no:Cov chaw tsim khoom thov hais tias RMS zam tau rau lub sijhawm luv luv uas tau hais los ntawm tam sim no thiab lub sijhawm tuaj yeem suav tias yog RMS kev zam rau cov khoom siv rau lub sijhawm txwv, raws li cov xwm txheej cuam tshuam, rau kev ua tiav cov khoom siv thiab cov khoom siv hluav taws xob.Tab sis qhov xwm txheej ntawm ntau yam khoom tsis zoo ib yam, lub ntsiab lus ntawm qhov ntsuas lub sij hawm luv luv tam sim no tus nqi yuav tsis zoo ib yam, nws cov tub ntxhais tseem ceeb yog cov ntsiab lus hauv qab no:

• Xyuas kom muaj kev ntseeg siab ntawm qhov system fais fab mov;

• Los ntawm kev ua kom muaj kev ntseeg siab ntawm cov khoom siv hluav taws xob, kev ruaj ntseg ntawm cov khoom nws tus kheej

Rau qhov kev faib hluav taws xob tsawg, qhov ntsuas luv luv tam sim no yog txiav txim siab los ntawm qhov luv-circuit tam sim no uas yuav tshwm sim hauv qhov system ntawm qhov chaw teeb tsa thiab lub sijhawm uas cov khoom nws tus kheej thiab lwm yam khoom hauv lub cev tuaj yeem tiv taus qhov tam sim no.

Iec60364-4-43 tus qauv rau kev tiv thaiv luv luv Circuit Court ntawm cov hluav taws xob faib hluav taws xob tau hais meej meej: ntawm txhua qhov chaw hauv lub voj vim yog luv luv Circuit Court tshwm sim los ntawm tag nrho cov tam sim no, yuav tsum tsis txhob tshaj qhov tam sim no, nyob rau hauv qhov system conductor tsis pub tshaj qhov tso cai kub ntawm lub sijhawm tawg.

Rau luv luv Circuit Court ntev tsis pub dhau 5 vib nas this, lub sij hawm (t) rau tus neeg xyuas pib nce los ntawm nws ib txwm ua hauj lwm tso cai qhov kub thiab txias rau nws qhov siab tshaj plaws tso cai kub yuav roughly xam los ntawm cov nram qab no mis:

T = (k * S / I) 2K cov khoom coefficient, S conductor cheeb tsam, Kuv luv-circuit tam sim no tus nqi.

Saum toj no, xaiv cov khoom siv uas tsis tshua muaj siab nyob rau lub sijhawm luv luv tam sim no tus nqi tam sim no, los ntawm qhov chaw teeb tsa ntawm qhov siab tshaj plaws luv luv tam sim no, tus neeg xyuas pib lossis lwm yam khoom siv hauv lub cev los ntawm kev ua haujlwm kub nce mus rau qhov kub thiab txias tuaj yeem tiv taus qhov txwv ntawm lub sijhawm, ob qho no Txhawm rau txiav txim siab qhov siab tshaj plaws luv-circuit tam sim no qhov chaw teeb tsa thiab lub kaw lus tuaj yeem tiv taus qhov siab tshaj plaws luv luv tam sim no ntawm lub sijhawm, Nws kuj txiav txim siab lub sijhawm luv luv tam sim no-lub sij hawm kam rau ntawm cov khoom siv hluav taws xob tsawg ntawm qhov chaw teeb tsa.

Vim tias cov qauv thiab siv cov khoom siv hluav taws xob sib txawv sib txawv, muaj qee qhov tshwj xeeb uas yuav tsum tau ua rau luv luv-lub sij hawm tam sim no-lub sij hawm tus nqi ntawm lub hauv paus ntawm kev txaus siab rau qhov system kev ruaj ntseg:

• Rau cov khoom siv hluav taws xob xws li cov busbars, cov khoom siv hluav taws xob tsawg, thiab cov khoom siv hluav taws xob disconnecting, tus nqi luv luv tam sim no yuav tsum tsis txhob qis dua li qhov xav tau luv luv tam sim no tus nqi ntawm qhov chaw teeb tsa, thiab lub sijhawm luv luv ntawm lub sijhawm tam sim no yuav tsum. tsis yog luv dua lub sijhawm ua haujlwm ntawm cov khoom siv tiv thaiv hauv qhov system.

• Rau cov hluav taws xob hluav taws xob siv chav kawm B, tus nqi luv luv tam sim no yuav tsum tsis pub tsawg dua li qhov xav tau luv luv tam sim no tus nqi ntawm qhov chaw teeb tsa, thiab lub sij hawm luv luv-tolerance tam sim no yuav tsum tsis pub tsawg dua lub sijhawm ua haujlwm ntawm lub kaw lus qis dua. -theem tiv thaiv cov cuab yeej, thiab xyuas kom muaj kev xaiv nrog cov khoom siv tiv thaiv qis.

Tam sim no, lub kaw lus fais fab mov load thiab xav kom luv luv tam sim no nce, kev faib tsheb npav qhov ceev ceev nce, cov khoom siv hluav taws xob tsawg tsawg miniaturization, yog tias tsuas yog nrhiav kev ua siab ntev tam sim no nyob rau hauv lub sij hawm ntev txwv ntawm tus nqi siab, qhov tseeb, tsis muaj qhov tseem ceeb tshaj plaws.

Yog li, raws li qhov ua tau siab tshaj plaws luv luv tam sim no kev teeb tsa cov ntsiab lus thiab lwm yam khoom siv hauv lub cev tuaj yeem tiv taus qhov siab tshaj plaws luv luv tam sim no ntawm lub sijhawm, tsim nyog xaiv cov khoom siv hluav taws xob hauv kev nyab xeeb raws li lub sijhawm txwv luv luv tam sim no tus nqi, hauv raws li 0.5 s Icw qhov tseem ceeb rau kev ntsuam xyuas zoo li tau ua tau raws li qhov yuav tsum tau muaj ntawm kev ruaj ntseg thiab kev ua haujlwm siab tshaj plaws.