Iyini i-DC miniature circuit breaker (MCB)?
Imisebenzi ye-DC MCB ne-AC MCB iyafana. Zombili zivikela izinto zikagesi nezinye izinto zokulayisha ekulayisheni ngokweqile nasezinkingeni zesiyingi esifushane, futhi zivikela ukuphepha kwesekethi. kodwa izimo zokusetshenziswa kwe-AC MCB ne-DC MCB zihlukile. Ngokuvamile kuncike ekutheni i-voltage esetshenziswayo ishintshashintshanisa izimo zamanje noma izimo zamanje eziqondile. Iningi le-DC MCB lisebenzisa ezinye izinhlelo zamanje eziqondile njengamandla amasha, i-solar PV, njll. Izimo zamandla kagesi ze-DC MCB ngokuvamile zisuka ku-DC 12V-1000V.
Umehluko phakathi kwe-AC MCB ne-DC MCB ngamapharamitha aphathekayo kuphela, i-AC MCB inamalebula amatheminali njenge-LOAD kanye namatheminali E-LINE kuyilapho i-DC MCB izoba nophawu oluhle (+) noma olunegethivu (-) kutheminali yayo.
Ungaxhuma kanjani i-DC MCB ngendlela efanele?
Ngenxa yokuthi i-DC MCB inophawu luka-'+' no-'-' kuphela, ngokuvamile kulula ukuxhuma ngokungalungile. Uma i-DC miniature circuit breaker ixhunywe noma ifakwe izintambo ngokungalungile, akhona amathuba okuba kube nezinkinga. Uma kwenzeka ukulayisha ngokweqile noma ukujikeleza okufushane, i-MCB ngeke ikwazi ukusika i-current futhi ikhiphe i-arc, lokhu kungase kuholele ekushiseni kwe-breaker.
Ngakho-ke, i-DC MCB inophawu lwezimpawu '+' kanye no-'-', kusadingeka ukuthi imake indlela yesifunda kanye nemidwebo yezintambo, njengoba kukhonjisiwe ngezansi:
2P 550VDC
4P 1000VDC
Ngokomdwebo wezintambo, i-2P DC MCB inezindlela ezimbili zokufaka izintambo, eyodwa engaphezulu ixhunywe ezigxotsheni ezinhle nezingezinhle, enye indlela ingaphansi ixhunywe ezigxotsheni ezinhle nezingezinhle njengokumaka kuka-'+' kanye no-'- '. Ku-4P 1000V DC MCB inezindlela ezintathu zokufaka izintambo, ngokuya ngezimo ezihlukene zokusetshenziswa, ukukhetha umdwebo wezintambo ohambisanayo ukuze uxhume izintambo.
Ingabe i-AC MCB isebenza ezifundazweni ze-DC?
Isignali yamanje ye-AC ishintsha ngokuqhubekayo inani layo ngomzuzwana ngamunye. Isiginali ye-voltage ye-AC iyashintsha isuka kokuthi iphozithivu iye kokubi kuwo wonke umzuzwana womzuzu. I-arc ye-MCB izocishwa ku-0 Volts, izintambo zizovikelwa ku-current enkulu. Kodwa isignali ye-DC ayishintshani, igeleza esimweni esingaguquki futhi inani le-voltage lishintshwa kuphela lapho isifunda SIMULIWE noma isifunda sehla ngenani elithile. Uma kungenjalo, isekethe ye-DC izohlinzeka ivelu engashintshi ye-voltage ngomzuzwana ngamunye womzuzu. Ngakho-ke, njengoba lingekho iphoyinti elingu-0 endaweni ye-DC, ayiphakamisi ukuthi i-AC MCB isebenze ezifundeni ze-DC.
Isikhathi sokuthumela: Jul-30-2021