DC Circuit Breaker

DC Circuit Court breaker yog ib qho kev hloov thiab tiv thaiv cov cuab yeej tshwj xeeb uas tsim los rau cov khoom siv hluav taws xob ncaj qha (DC) circuits, siv los txiav tawm Circuit Court nyob rau hauv cov ntaub ntawv ntawm overload, luv Circuit Court, los yog lwm yam txhaum, thiaj li tiv thaiv cov khoom siv hluav taws xob, kab thiab kev nyab xeeb ntawm tus kheej.

Daim ntawv thov scenarios ntawm DC Circuit Breakers

DC Circuit Court breakers yog dav siv nyob rau hauv lub neej niaj hnub thiab kev lag luam ntau lawm. Lawv tsuas yog siv rau hauv cov xwm txheej uas yuav tsum tau siv hluav taws xob ncaj qha (DC) hluav taws xob, ua haujlwm ntawm Circuit Court rau / tawm tswj thiab tiv thaiv overload thiab luv luv Circuit Court. Piv nrog AC Circuit Court breakers, DC Circuit Court breakers tuaj yeem tua cov arc tsim tau zoo dua thaum lub DC Circuit Court raug txiav, uas yog qhov tseem ceeb hauv DC fais fab xwm txheej.

Cov xwm txheej tseem ceeb ntawm daim ntawv thov tau piav qhia raws li hauv qab no:

1. Kev tsim hluav taws xob photovoltaic

Qhov no yog qhov feem ntau daim ntawv thov scenario ntawm DC Circuit Court breakers. Cov vaj huam sib luag hauv tsev thiab kev lag luam hnub ci tsim hluav taws xob ncaj qha, thiab DC Circuit Court breakers yog cov khoom tseem ceeb uas tau nruab rau ntawm DC sab ntawm photovoltaic system -tshwj xeeb ntawm lub thawv sib txuas thiab lub inverter. Lawv lub luag haujlwm tseem ceeb yog kom muaj kev nyab xeeb txiav tawm DC tam sim no hauv cov khoom siv tsis ua haujlwm lossis kev saib xyuas, tiv thaiv kev tsim hluav taws xob thiab hluav taws kub, yog li tiv thaiv lub hnub ci vaj huam sib luag, DC cables thiab inverters los ntawm kev puas tsuaj.

2. Cov Tsheb Hluav Taws Xob Tshiab thiab Chaw Nres Tsheb

DC Circuit Court breakers ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm lub zog tshiab tsheb (NEVs) thiab txhawb nqa cov chaw them nyiaj. Lub siab -voltage roj teeb pob ntawm lub tsheb hluav taws xob (feem ntau yog 300V-}800V DC) siv DC Circuit Court breakers ua lub ntsiab hloov thiab cov khoom tiv thaiv luv luv. Tsis tas li ntawd, DC ceev them cov pawg hauv cov chaw them nqi kuj tseem tso siab rau DC Circuit Court breakers kom paub txog kev nyab xeeb hluav taws xob thiab kev tiv thaiv txhaum ntawm daim phiaj hluav taws xob thiab lub tsheb roj teeb.

3. Zog Cia Systems thiab UPS

DC Circuit Court breakers yog dav siv nyob rau hauv lub zog cia thiab uninterruptible fais fab mov systems. Qhov no suav nrog cov roj teeb lub zog hauv tsev, cov khoom siv hluav taws xob rov qab rau cov chaw nres tsheb sib txuas lus, thiab loj - teev UPS (Uninterruptible Power Supply) hauv cov chaw zov me nyuam. Lawv yog lub luag haujlwm rau kev tswj hwm kev nyab xeeb thiab kev tiv thaiv ntawm cov pob roj teeb thiab cov khoom siv hluav taws xob, ua kom muaj kev ruaj ntseg ntawm cov khoom siv hluav taws xob thiab tiv thaiv cov xwm txheej tshwm sim los ntawm overload lossis luv luv Circuit Court.

4. Rail Transit thiab Industrial Fields

Hauv kev tsheb ciav hlau thauj mus los xws li subways thiab trams, DC Circuit Court breakers yog siv rau hauv cov khoom siv hluav taws xob los xyuas kom muaj kev nyab xeeb ntawm tag nrho lub zog hluav taws xob. Hauv kev tsim khoom lag luam, lawv kuj tau siv rau DC motors, loj- nplai electrolytic plating cov cuab yeej thiab lwm yam DC- cov khoom siv hluav taws xob hauv cov chaw tsim khoom, muab kev tiv thaiv kev lag luam thiab kev nyab xeeb ntawm kev tsim khoom.

5. Txhua hnub Electronics thiab Kev Sib Txuas Lus

DC Circuit Court breakers yog ze rau cov khoom siv hluav taws xob niaj hnub thiab cov khoom siv sib txuas lus. Piv txwv li, 5G lub hauv paus chaw nres tsheb thiab chav computer siv -48V DC fais fab faib khoom, uas yog nruab nrog DC Circuit Court breakers rau ceg tiv thaiv. Hauv cov khoos phis tawj thiab cov servers, ntau qhov chaw DC tso zis (xws li 12V thiab 5V) kuj tso siab rau DC Circuit Court breakers kom ruaj khov. Tsis tas li ntawd, 12V / 24V DC faib boards ntawm yachts thiab RVs kuj yog cov ntawv thov raug cai ntawm DC Circuit Court breakers.

6. DC Microgrids thiab Lub Tsev DC Distribution

Nrog rau kev txhim kho lub zog-txuag thiab txuag lub tsev, DC faib tshuab tau maj mam siv rau hauv qee lub tsev siab -kawg, chav kuaj thiab lwm qhov chaw. Cov tshuab no yog tsim los rau DC- cov khoom siv hluav taws xob xws li LED teeb pom kev zoo thiab DC kiv cua, thiab DC Circuit Court breakers yog siv los paub txog kev nyab xeeb thiab kev tiv thaiv DC fais fab, txhim kho kev siv hluav taws xob thaum ua kom muaj kev nyab xeeb.

Qhov txawv ntawm AC Circuit Breakers thiab DC Circuit Breakers

Txawm hais tias ob qho tib si hu ua "circuit breakers" thiab tej zaum yuav muaj qhov zoo sib xws, AC Circuit Court breakers thiab DC Circuit Court breakers tsis tuaj yeem sib xyaw, txwv tsis pub nws yuav ua rau muaj kev nyab xeeb loj. Hauv qab no, peb yuav piav qhia txog qhov sib txawv ntawm lawv los ntawm peb yam: hauv paus ntsiab lus, qauv, thiab daim ntawv thov.

1. Core Difference: Arc Extinguishing muaj peev xwm

Qhov no yog qhov sib txawv ntawm ob qho tib si.

Hloov tam sim no (AC): Qhov loj thiab kev taw qhia ntawm kev hloov pauv tam sim no 50 zaug ib ob (50Hz). Qhov no txhais tau tias txhua 1/100 thib ob (10 milliseconds), tam sim no yuav dhau los ntawm "zero point". Nyob rau ntawm xoom, lub arc yuav ib txwm extinguish. Yog li lub arc extinguishing ntawm AC Circuit Court breakers yog ib qho yooj yim.

Direct tam sim no (DC): Qhov loj thiab kev taw qhia ntawm qhov tam sim no tsis tu ncua thiab tsis muaj xoom hla. Thaum ib qho arc raug tsim tawm, tsuav yog lub zog hluav taws xob txaus los tswj nws, lub arc yuav txuas ntxiv hlawv. Yog li ntawd, qhov nyuaj ntawm kev tua DC arcs yog ntau dua li ntawm AC arcs.

Txhawm rau tua DC arc, kev ntsuas tshwj xeeb yuav tsum tau ua rau DC Circuit Court breaker:

• Ntev arc extinguishing chamber, elongating lub arc kom txias nws.
• Siv lub tshuab magnetic arc extinguishing system (magnetic blowing coil) kom sai sai rub lub arc mus rau hauv arc extinguishing kab sib chaws uas siv cov magnetic teb.
• Feem ntau, ntau qhov kev sib cuag tau txuas nrog hauv koob los faib cov arc ntev mus rau ntau qhov luv arcs.

2, Qhov tseem ceeb sib txawv ntawm cov qauv thiab tsis

3. Vim li cas nws thiaj tsis hloov pauv tau?

Hloov DC Circuit Court breakers nrog AC Circuit Court breakers:

Risk: Nyob rau hauv cov xwm txheej ntawm DC luv Circuit Court, lub arc tsis tuaj yeem tua. Circuit Court breakers tuaj yeem hlawv, tawg, thiab tsis tu ncua emit arcs, igniting ib puag ncig combustibles. Qhov no yog txwv tsis pub.

Hloov AC Circuit Court breakers nrog DC Circuit Court breakers:

Risk: Txawm hais tias nws yuav tsis tawg tam sim ntawd, DC Circuit Court breakers yog tsim los rau qhov arc tas li thiab tej zaum yuav tsis muab kev tiv thaiv raug nyob rau hauv AC circuits vim yog cov qauv complex ntawm lub arc extinguishing chamber, uas ua rau siab overvoltage los yog mismatched tripping yam ntxwv. Thiab tus nqi siab dua, tsis tsim nyog kiag li.

4. Yuav ua li cas kom paub qhov txawv nrawm?

Tshawb xyuas cov npe tsis muaj npe: txoj kev txhim khu kev qha tshaj plaws. AC (~) lossis DC (⎓) yuav raug cim kom meej saum toj no.

Txheeb xyuas qhov kev txheeb xyuas lub davhlau ya nyob twg: Feem ntau muaj qhov tseeb "+" thiab "-" cov cim polarity ntawm ib sab ntawm DC Circuit Court breaker terminals. Tsis muaj kev sib txuas lus Circuit Court breaker.

Saib ntawm lub arc extinguishing chamber: Lub arc extinguishing chamber ntawm DC Circuit Court breaker feem ntau ntev dua thiab nyuaj, nrog ntau thiab denser pom hlau daim phiaj sab hauv.

5. Cov lus qhia rau kev siv hauv lub neej txhua hnub

• Photovoltaic, hluav taws xob tsheb, thiab roj teeb lub zog cia: Tshwj xeeb DC Circuit Court breakers yuav tsum tau siv thiab nruj me ntsis wired raws li polarity qhia.
• Ordinary tsev neeg 220V teeb pom kev zoo lub qhov (socket): Siv tus qauv AC Circuit Court breakers (feem ntau xws li C- hom kev mus ncig curves).
• Tsis tshua muaj hluav taws xob DC cov khoom siv me me, xws li 12V ntses tank dej twj lossis LED lub teeb strips, tuaj yeem hloov nrog DC fuses me me lossis hloov pauv yog tias tam sim no qis heev. Txawm li cas los xij, tsis txhob siv cov hloov pauv AC zoo tib yam los tswj DC, txwv tsis pub sab hauv arcing yuav ua rau lub hloov pauv sai.

Cov ntsiab lus:AC Circuit Court breakers tsis tuaj yeem siv rau DC circuits, thiab siv DC Circuit Court breakers rau AC circuits kuj tsis muaj kev nyab xeeb thiab khib nyiab. Thaum yuav thiab txhim kho, nco ntsoov paub meej tias AC / DC lub logo ntawm daim ntawv teev npe.

DC Circuit Breakers hauv Photovoltaic Systems

DC Circuit Court breakers nyob rau hauv lub tshuab photovoltaic ua lub hauv paus "safety guards" kom muaj kev nyab xeeb ntawm tag nrho cov chaw nres tsheb fais fab. Txij li thaum PV modules tsim ncaj qha tam sim no thiab qhov system voltages tas li nce (feem ntau ncav cuag 600V-1500V), lawv nthuav tawm cov kev sib tw tshwj xeeb rau kev hloov hluav taws xob thiab kev tiv thaiv.

Hauv qab no yog plaub qhov tseem ceeb rau kev xaiv thiab txhim kho DC Circuit Court breakers hauv photovoltaic systems:

1. Core Challenge: DC Arc Extinguishing

Qhov no yog qhov sib txawv ntawm PV DC Circuit Court breakers thiab AC Circuit Court breakers.

Tsis zoo li alternating tam sim no, direct tam sim no tsis muajxoom- hla taw tes. Thaum ib qho arc tsim thaum lub sij hawm tawg, nws tseem kub hnyiab thiab tsis tuaj yeem tua nws tus kheej yooj yim. Ua tsis tau zoo tua cov arc yuav hlawv cov neeg sib cuag los yog, nyob rau hauv cov xwm txheej hnyav, ua rau hluav taws.

Kev daws: PV- tshwj xeeb DC Circuit Court breakers yog nruab nrog siab -kev ua tau zoo arc extinguishing chamber thiab magnetic blowout system. Siv lub zog sib nqus, lub arc yog nrawm nrawm thiab thawb mus rau hauv ib daim phiaj hlau ntom ntom, qhov uas nws txias, sib cais, thiab tua sai sai.

Ceeb toom kev nyab xeeb: Ordinary AC Circuit Court breakers yogtxwv tsis pubraws li kev hloov. Lawv tsis tuaj yeem tua DC arcs zoo thiab ua rau muaj kev phom sij heev.

2. Core Parameters: Voltage thiab tam sim no Matching

Kev xaiv kom raug ncaj qha txiav txim siab txog kev tiv thaiv zoo.

Rated Voltage: Lub ntsuas hluav taws xob ntsuas hluav taws xob yuav tsum yogntau dua los yog sib npaugqhov siab tshaj plaws voltage ntawm PV system. Qhov siab tshaj qhov hluav taws xob no tsis yog qhov hluav taws xob ua haujlwm, tab sis tso nyiaj rau qhov qhib ntau dua - Circuit Court voltage ntawm PV modules ntawm qhov kub thiab txias. Cov kab hluav taws xob hauv tsev feem ntau siv 600V-1000V, thaum loj - lub zog hluav taws xob tuaj yeem ncav cuag 1500V.

Rated Tam sim no: Cov125% txoj caiFeem ntau yog siv: lub breaker qhov ntsuas tam sim no Ntau dua lossis sib npaug rau qhov siab tshaj plaws kev khiav hauj lwm tam sim no ntawm Circuit Court × 1.25.Piv txwv li, yog tias lub Circuit Court qhov siab tshaj plaws kev khiav hauj lwm tam sim no yog 50A, lub 63A breaker yuav tsum raug xaiv kom tsis txhob muaj kev cuam tshuam los ntawm kev kub ntxhov thaum lub sijhawm ua haujlwm ib txwm muaj.

3. Ntsiab Lus Qhia: Polarity thiab Wiring

Qhov no yog qhov yuam kev tshaj plaws -nws tseem ceeb heev rau kev teeb tsa.

Polarity Marking: Feem ntau PV DC Circuit Court breakers yog polarity -sensitive, nrog meej "+" thiab "–" cov cim ntawm lub davhlau ya nyob twg.

Txoj cai thaiv kab: Kev xaim yuav tsum nruj me ntsis raws li cov cim (txuas cov khoom zoo rau "+" thiab qhov tsis zoo rau "–"). Rov qab xaim yuav tsis cuam tshuam rau kev tiv thaiv overload, tab sis thaum lub sij hawm luv luv, lub sab hauv arc - tua hluav taws xob sib nqus yuav raug yuam kev. Lub arc tsis tuaj yeem raug kos rau hauv arc chamber, uas tuaj yeem hlawv qhov hloov lossis ua rau tawg.

Series kev sib txuas rau siab dua Voltage: Txhawm rau ua kom muaj kev nyab xeeb dua -voltage DC circuits, ntau-ncej breakers feem ntau txuas nrog hauv series. Piv txwv li, 2-ncej breaker (txhua tus ncej cuam tshuam 250V) tuaj yeem siv rau hauv cov kab ke rau 500V system.

4. Cov Qauv Tso Cai: Zoo thiab Ntawv Pov Thawj

Xaiv cov khoom raug cai yog qhov kawg lav ntawm kev nyab xeeb.

National Standard: Tuam Tshoj tau tsim tshwj xeeb hauv GB / T 34581-2017 "Cov Lus Qhia Tshwj Xeeb rau DC Circuit Breakers rau Photovoltaic Systems" rau cov ntawv thov photovoltaic, uas teeb tsa cov kev ua haujlwm nruj thiab kev sim rau cov khoom zoo li no.

Daim ntawv pov thawj tseem ceeb: Thaum yuav khoom, xyuas seb cov khoom puas raug cim nrog "DC" logo thiab seb nws puas ua raws li kev tso cai thoob ntiaj teb lossis kev lag luam ntawv pov thawj xws li TÜV, UL489B, lossis IEC 60947-2. Cov ntawv pov thawj no ua kom cov khoom ua tau raws li cov qauv kev nyab xeeb thiab kev ua haujlwm nruj.

🔧 Daim ntawv thov piv txwv: Qhov twg rau nruab Circuit Breaker?

Ib tug raug photovoltaic system yuav tsum tau DC Circuit Court breakers yuav tsum tau ntsia nyob rau hauv peb qhov chaw tseem ceeb hauv qab no, txhua tus pab ib tug tshwj xeeb kev tiv thaiv lub luag hauj lwm:

• Photovoltaic Module → Tswj (MPPT): Nruab nyob rau hauv pem hauv ntej ntawm lub mixer box los yog maub los, nws tiv thaiv tam sim no backflow uas yuav ua rau puas PV modules. Qhov kev teeb tsa no tsis txhob thim rov qab tam sim no los ntawm lub kaw lus ua rau cov modules puas, tshwj xeeb tshaj yog thaum kaw lossis ua txhaum.
• Controller (MPPT) → Roj teeb: Tiv thaiv lub charger Circuit Court los ntawm overload los yog luv luv Circuit Court. Nws ua kom lub roj teeb tsis muaj overcharged thiab tiv thaiv kev puas tsuaj rau cov maub los thiab roj teeb uas tshwm sim los ntawm qhov txawv txav tam sim no.
• Roj teeb → Inverter: Nruab ze li sai tau rau qhov zoo tso zis davhlau ya nyob twg ntawm lub roj teeb, qhov no yog qhov tseem ceeb tshaj plaws tiv thaiv taw tes hauv tag nrho cov kab ke. Nws tuaj yeem tswj tau qhov siab tam sim no tsim los ntawm kev ua txhaum ntawm inverter, tiv thaiv hluav taws lossis khoom siv puas tsuaj los ntawm kev luv luv hauv inverter.

Xaus:

DC Circuit Court breakers yog ib qho tseem ceeb ntawm cov tshuab photovoltaic. Yog tsis muaj lawv cov kev tiv thaiv, PV vaj huam sib luag muaj kev cuam tshuam ntau dua rau kev puas tsuaj, thiab tag nrho cov kab ke muaj feem cuam tshuam. DC Circuit Court breakers thiab AC Circuit Court breakers muaj lub luag haujlwm thiab kev siv hauv lub neej niaj hnub thiab kev tsim khoom, thiab tsis tuaj yeem hloov tau los ntawm lwm yam -ob qho tib si tseem ceeb heev rau kev ua haujlwm ib txwm muaj ntawm cov khoom siv. Los ntawm kev ua raws li cov txheej txheem xaim kom raug, kev ntsuas kev nyab xeeb, cov txheej txheem tu, DC Circuit Court breakers tuaj yeem muab kev tiv thaiv kev ruaj ntseg rau ntau lub tshuab hluav taws xob photovoltaic, ua kom lawv muaj kev nyab xeeb thiab ruaj khov.