Vim li cas thiaj li nruab ib qho SCB (Surge Circuit Breaker) nyob rau pem hauv ntej-kawg ntawm SPD (Surge tiv thaiv ntaus ntawv)

Dab tsi yog SCB?

SCB - Surge Circuit breaker lossis SPD thaub qab tiv thaiv

Vim li cas SCB?

SCB ua tiav qhov kev daws teeb meem thoob ntiaj teb ntawm kev tiv thaiv kom tsis txhob tiv thaiv cov khoom tsis zoo ntawm lub dawm.

Khoom Siv Pab

1. Xaiv kev txiav tawm ntawm lub hwj chim dhau los tam sim no thiab xob laim hluav taws xob tam sim no tuaj yeem tiv thaiv SPD tiv thaiv luv luv thiab luv luv ntawm SPD vim tsis muaj qhov hloov pauv ntawm dhau-voltage, uas ua rau muaj hluav taws kub nyhiab loj.

2. Xaiv qhov kev faib tawm ntawm lub hwj chim dhau los tam sim no thiab xob laim tam sim no muaj peev xwm tiv thaiv SPD tsis txhob ua rau SPD pib qhov hluav taws xob poob qis qis dua lub zog fais fab voltage, thiab lub zog hluav taws xob tam sim no nce ntxiv, ua rau muaj hluav taws kub nyhiab loj.

3. Thaum SPD muaj lub xob laim tam sim no, lub tshuab hluav taws xob sab nraud yuav tsis raug yuam kev, thiaj li hais tias xob laim tiv thaiv ntawm cov khoom hluav taws xob yog ib txwm nyob hauv lub xeev muaj txiaj ntsig.

Scope ntawm daim ntawv thov

Lub SCB nplooj siab tiv thaiv thaub qab muab kev tiv thaiv kev tiv thaiv kev tiv thaiv rau SPD (Cov Ntaus Tshav Tiv Thaiv Tshav Tiv Thaiv) uas tiv thaiv lub zog ntawm thawj theem, qib ob thiab qib peb. Siv rau qhov chaw uas SPD tiv thaiv cov khoom hluav taws xob tau raug teeb tsa, xws li cov khoom siv fais fab rau kev tsim kho thiab pej xeem kev tsim kho, hluav taws xob, kev sib txuas lus, kev thauj mus los, roj av thiab lwm yam kev lag luam.

Ua hauj lwm txoj cai

SCB, tshwj xeeb sab nraud disconnector ntawm SPD, yog ib hom ntawm cov khoom siv uas tau tsim raws li tsab xov xwm 430.3 hauv IEC61643-4-43: txais kev tsim nyog dhau - tam sim no tiv thaiv cov khoom siv ua ntej kev phom sij los ntawm Circuit Court. Nws feem ntau daws cov teeb meem uas thaum ua raws li qhov dej ntws lossis dej ntws tawm hauv SPD, SCB tuaj yeem mus nrawm, thaum lub sijhawm hluav taws xob dhau, SCB tsis taug kev, SCB ua kom ntseeg tau tias SPD tsis ua hluav taws thiab teeb pom kev tiv thaiv cov cuab yeej kav ntev, kev daws cov teeb meem uas muaj kev tiv thaiv qhov muag tsis pom nyob rau hauv cov kev siv fuses thiab cov hluav taws xob uas siv tam li sab nraud disconnectors. SCB yog cov khoom siv hluav taws xob zoo sib xws ntawm kev hloov hluav taws xob hom SPD, kev siv hluav taws xob tsis sib xws SPD siv cov hluav taws xob qis siv hluav taws xob.

Thoob plaws lub ntiaj teb tau koom tes los daws cov teeb meem:

Thaum lub qhov cub hluav taws xob ntawm SPD siv sijhawm, cov hluav taws xob sab nraud tsis sib txuas, Thiab thaum lub nraub qaum mus los ntawm SPD, cov hluav taws xob sab nraud txiav tawm tsis raug.

Lub teb chaws German ua qhov kev sim ntawm xob laim tam sim no cuam tshuam rau cov fuses thiab cov hluav taws xob tawg hauv xyoo 1997. Thaj chaw ntsuab txhais tau tias kev sib txuas, thaj chaw txiv kab ntxwv txhais tau tias tsis paub tseeb, thiab thaj chaw liab txhais tau hais tias kev cuam tshuam.

IEC tau kos qauv thiab hloov kho tus qauv ntawm SPD. Sub-committee 37A teeb tsa Pawg Neeg Tswj Xyuas Ua Haujlwm 12 hauv Austria-Vienna lub rooj sib tham. daws cov teeb meem kev sib haum xeeb ntawm tej fais fab thiab SPD.

Ntau lub teb chaws nyob ib ncig ntawm lo lus pib tshaj tawm txoj kev tshawb nrhiav qhov teeb meem tsis zoo ntawm MOVs (hlau oxide varistors) SPD.

1. Thaum qhov cuam tshuam ntawm SPD tshwm sim, qhov teeb meem ntawm qhov hluav taws xob tsis zoo yog qhov U_c tus nqi txo.
2. Thaum U_c tus nqi txo kom qhov voltage ntawm lub zog, to tam sim no yuav nce siab.
3. Thaum hluav taws xob pom hluav taws xob tsis xwm yeem dhau-voltage, nws yuav ua rau SPD pib.
4. Thaum lub cev hluav taws xob qub tam sim no ntau dua 5A ntws los ntawm SPD, qhov hluav taws xob ceev tau sai dua li kev hloov cua sov.

Thaum tam sim no ntau dua 5A hla dhau los ntawm SPD, nws tuaj yeem ntes hluav taws tam sim ntawd, yog li SPD xav tau lub pob hluav taws xob tiv thaiv uas tso tawm sai thaum tam sim no ntau dua 5A hla dhau los kom tsis txhob muaj hluav taws!

Nws xav tau hais tias thaum lub teeb liab hluav taws xob tam sim no ntws los ntawm, nws tsis ntws, uas ua kom qhov kev ua tau zoo hauv kev ua haujlwm.

Thaum degeneration ntawm SPD tshwm sim lossis ua ntej tso dej tawm tam sim no los ntawm lub zog tsis ncaj nce mus txog 5A, nws tuaj yeem mus nrawm.

Dab tsi tuaj yeem SCB daws cov teeb meem

Cov tsis sib xws ntawm cov hluav taws xob tiv thaiv hluav taws xob thiab fuse lossis breaker?

Cov txheej txheem ib txwm yog los txuas lub fuse lossis breaker hauv series nyob rau hauv pem hauv ntej ntawm xob laim tiv thaiv khoom siv, yuav muaj plaub yam tsis sib xws yog tias ua li ntawd.

1. Thaum xob laim tiv thaiv cov khoom tiv thaiv qis lossis muaj overvoltage tshwm sim hauv kev faib tawm, lub teeb hluav taws xob tiv thaiv hluav taws xob yuav ua rau luv luv rau hauv av thiab Fuses lossis cov hluav taws xob tsis tuaj yeem cuam tshuam sai
2. Thaum xob laim tshwm sim, fuses lossis tej fais fab tsis tuaj yeem sawv ib ntus lub zog ntawm xob laim tam sim no, rau lawv tau siv los ua hluav taws xob faib hluav taws xob hauv kev tsim qauv thaum ntxov. Yog li nws yog qhov yooj yim uas ua rau lawv mus ncig lossis tawg, ua rau xob laim thaiv tsis muaj txiaj ntsig.
3.  Thaum xob laim ntawm hluav taws xob dhau los ntawm kev tawg, Lub pob Up yog qhov siab heev thiab cov khoom siv hluav taws xob tsis tuaj yeem tiv thaiv cov cuab yeej zoo.
4.  Fuses lossis tej hluav taws xob tsis tuaj yeem cuam tshuam nyob rau hauv lub hwj chim yuav nruab kab ntawm lub tshuab hloov hluav taws xob. Thaum luv luv Circuit Court tshwm sim, lawv tsis tuaj yeem tsoo sai.

SCB tuaj yeem daws plaub yam teeb meem tib lub sijhawm

SCB, txuas rau hauv cov kab ua ntej SPD tuaj yeem daws plaub yam teeb meem tib lub sijhawm.

1. Thaum xob laim tiv thaiv cov cuab yeej tiv thaiv lossis muaj overvoltage tshwm sim hauv qhov faib hluav taws xob, SCB tuaj yeem tshem tawm sai sai kom tsis txhob muaj hluav taws xob tiv thaiv hluav taws xob los ntawm kev tua. Qhov tawg tam sim no tsawg dua 3 A.
2. Thaum xob laim hluav taws xob tam sim no mus dhau, SCB txuas hauv cov kab txuas rau hauv pem hauv ntej ntawm SPD tuaj yeem ua kom tsis muaj kev cuam tshuam thiab tsis muaj kev puas tsuaj nyob rau hauv cov hluav taws xob tam sim no ntawm 100kA, ua kom SPD nyob rau hauv kev ua haujlwm.
3. Thaum xob laim tam sim no dhau los ntawm SCB, tus U_p tus nqi yog tsawg heev, sib npaug nrog tooj liab nrog tib ntev.
4. Lub peev xwm tawg ntawm SCB tshaj kev rhuav tshem cov yas, txog li 100kA.

Muaj qhov sib txawv loj heev hauv lub sijhawm thiab kev sib txawv ntawm lub zog hluav taws xob tam sim no thiab kev cia siab. SCB ua qhov zoo siv rau ntawm ob qhov no los tswj cov xaim hluav taws xob, ua tiav kev ua haujlwm ntawm kev ntsaws.

1. Thaum sib hloov tam sim no ntws los ntawm, lub tshuab hluav taws xob tuaj yeem mus xaiv xaiv los txiav kev sib hloov tam sim no.
2. Vim tias qhov ceev nrawm dhau lub nrawm nrawm, nrawm tau xaus ua ntej lub tshuab xaim hluav taws xob tau ua. Yog li ntawv hluav taws xob nyob hauv lub xeev ruaj khov thiab SCB tsis muaj kev mus ncig.

Qhov seem voltage ntawm SCBs, MCBs thiab Fuses hauv impulse tam sim no

Cov kev siv raug

SCB kev sib txuas nrog SPD daim duab hluav taws xob yooj yim