ndemanga ya Circuit Breakers
Circuit Breaker ndi chipangizo chofunikira kwambiri mu dongosolo lamagetsi chomwe chimagwiritsidwa ntchito kuteteza ndi kuwongolera ma circuit. Chimatha kutseka, kunyamula ndikuswa mphamvu yamagetsi pansi pa mikhalidwe yabwinobwino kapena yolakwika. Ntchito zake zazikulu zimaphatikizapo kuteteza mopitirira muyeso, kuteteza ma short-circuit, kuteteza undervoltage, ndi zina zotero. Ndi chofanana ndi kuphatikiza ma fuse ndi ma over/under-voltage thermal relay, koma chili ndi kudalirika kwakukulu komanso kugwiritsidwanso ntchito.

Magawo akuluakulu a khalidwe
Voliyumu yoyesedwa (Ue): Voliyumu yapamwamba kwambiri yomwe chopasula dera chimagwira ntchito bwino, monga 220V, 380V, ndi zina zotero. 37

Mphamvu yoyesedwa (In): Mtengo wapamwamba kwambiri wamagetsi womwe unganyamulidwe bwino kwa nthawi yayitali, womwe uyenera kukhala woposa mphamvu yogwirira ntchito ya dera ndi 35%.

Mphamvu yothyola (Icu/Ics): Mphamvu yothyola yafupipafupi (Icu) imatanthauza kuthekera kothyola mphamvu yothyola nthawi yayitali kwambiri yafupifupi. Mphamvu yothyola ya ntchito (Ics) imatanthauza malire amagetsi omwe angagwiritsidwebe ntchito akathyola. Kawirikawiri, ma frame circuit breakers amafuna Ics≥50%Icu, ndipo ma molded case circuit breakers amafuna Ics≥25% ICU.

Mphamvu yopirira nthawi yochepa (Icw): Mphamvu ya cholekanitsa dera kupirira mphamvu yozungulira nthawi yochepa mkati mwa nthawi inayake popanda kuwonongeka.

II. Kugawa Ma Circuit Breakers
1. Ndi mulingo wamagetsi
Ma circuit breaker amphamvu kwambiri: Amagwiritsidwa ntchito m'makina a 3kV ndi kupitirira apo. Zida zodziwika bwino zozimitsira arc zimaphatikizapo sulfure hexafluoride (SF6), vacuum, mafuta, ndi zina zotero. 4

Ma circuit breaker otsika-voltage amagawidwa m'magulu atatu: mtundu wa chimango (ACB), mtundu wa bokosi lopangidwa (MCCB), ndi mtundu wa miniature (MCB). 57.

2. Mwa kapangidwe ndi kagwiritsidwe ntchito
Choswerera dera cha mtundu wa chimango (ACB)
Mphamvu yoyesedwa: 200A mpaka 6300A, yokhala ndi chitetezo cha magawo anayi (kuchedwa kwa nthawi yayitali, kuchedwa kwakanthawi, nthawi yomweyo, komanso vuto la nthaka), imagwiritsidwa ntchito kwambiri kuteteza ma switch akuluakulu mumakina ogawa kapena zida zazikulu.

Chosweka cha circuit cha molded case (MCCB)
Kapangidwe kakang'ono, kokhala ndi mphamvu yamagetsi kuyambira 10A mpaka 1600A, koyenera kuteteza nthambi. MCCB yamagetsi imathandizira chitetezo chosankha, ndipo mitundu ina ili ndi ntchito yolumikizirana yachigawo 57.

Chothyola Chaching'ono Cha Circuit (MCB)
Imagwiritsidwa ntchito m'ma terminal circuits osakwana 125A (monga m'nyumba ndi m'mabizinesi), yomwe imapezeka mu 1P mpaka 4P specifications, ndipo imathandizira chitetezo cha overload, short circuit ndi leak.

3. Kanikizani ukadaulo wozimitsa moto wa arc
Chotsekera dera la vacuum: Chozimitsa moto mwachangu, nthawi yayitali yogwira ntchito, choyenera kugwiritsidwa ntchito pafupipafupi 4.

Chotsekera ma circuit cha SF6: Chili ndi mphamvu yabwino kwambiri yotetezera kutentha komanso kuzimitsa mpweya ndipo chimagwiritsidwa ntchito kwambiri m'makina amphamvu kwambiri. Kuyera kwa mpweya kuyenera kuyesedwa nthawi zonse.

III. Mfundo Zofunikira Posankha Circuit Breaker
Magawo ofanana a dera
Voliyumu yovotera ≥ voltage ya mzere, voltage yovotera ≥ mphamvu yayikulu yonyamula katundu, mphamvu yosweka ≥ mphamvu yochepa yoyendera yomwe ikuyembekezeka 57.

Kutengera mtundu wa katundu
Chitetezo cha injini chiyenera kuganizira mphamvu yoyambira (mtengo woyambira nthawi yomweyo ndi nthawi 1.35 mpaka 1.7 kuposa mphamvu yoyambira). Dongosolo lowunikira limatenga mphamvu yodzaza katundu kasanu ndi kamodzi kuposa mphamvu yodzaza katundu ya 78.

Kugwirizana kosankha
Ma circuit breaker apamwamba ndi otsika ayenera kukwaniritsa kusiyana kwa nthawi (monga kusiyana kwa zochita zochedwa ≥0.1s) ndi kusiyana kwa mphamvu (mphamvu yamagetsi ya gawo lapamwamba ≥ nthawi 1.2 kuposa ya gawo lapansi) kuti apewe kugwedezeka kwambiri.

Kusinthasintha kwa chilengedwe
Pa malo okwera kwambiri, chinyezi kapena kutentha kwambiri, mitundu yapadera iyenera kusankhidwa ndipo mphamvu yamagetsi yoyesedwa isinthidwe (kuchepetsa mphamvu kumafunika pamene kutentha kupitirira 40℃). 13.

Iv. Kuyesa ndi Kukonza Circuit Breaker
Zinthu zazikulu zoyesera
Kukana kukhudzana ndi chinthu mosasunthika/mwamphamvu: Dziwani kutayika kwa kukhudzana ndi chinthu 12.

Kusanthula kwa makhalidwe a makina: Nthawi yotsegulira ndi kutseka, liwiro ndi nthawi imodzi 14.

Kugwira ntchito kwa insulation: Kupirira mayeso a voltage, kuzindikira digiri ya vacuum (ya ma vacuum circuit breakers) 14.

Kutsimikizira ntchito ya chitetezo: Kuwerengera kuchuluka kwa zinthu zolemera kwambiri komanso zotsika pang'ono 8.

Mfundo zazikulu zosamalira
Kuyang'anira pafupipafupi: Kupanikizika kwa mpweya (SF6 circuit breaker), kuphatikizika kwa contact, mafuta odzola 48.

Mayeso oletsa: Amachitidwa motsatira miyezo monga GB/T 1984 ndi GB 14048, kamodzi pa chaka chimodzi kapena zitatu zilizonse.

Kusamalira zolakwika: Ngati mafuta akusowa, kutentha kwambiri kapena kuphulika, pamafunika kudzipatula mwadzidzidzi ndipo mavuto okhudzana ndi makina ozimitsira moto kapena arc ayenera kufufuzidwa.

V. Kusanthula Mavuto Ofala
Kusiyana pakati pa chosokoneza mawaya ndi cholumikizira mawaya
Cholumikizira magetsi (QS) chimagwiritsidwa ntchito kokha kupatula magetsi ndipo sichingathe kuzimitsa magetsi. Chotsegula magetsi (QF) chimatha kudula mphamvu yamagetsi kufika pa 12.

Kufunika kwa Icu ndi Ics
Icu imawonetsa mphamvu yosweka bwino kwambiri, ndipo Ics imawonetsa kudalirika kwa ntchito yopitilira. Mizere yayikulu imayang'ana kwambiri pa Ics, pomwe mizere ya nthambi imayang'ana kwambiri pa Icu8.

Kusankha ma circuit breakers oletsa magetsi
Yerekezerani mphamvu ya kutentha kwa chingwe kudzera mu current-limiting current, ndipo perekani patsogolo mitundu yomwe ili ndi liwiro lotha kusweka mwachangu (monga vacuum circuit breakers) 78.

Chitetezo cha kutayikira kwa madzi sichinagwire ntchito bwino
Chifukwa cha kuchepa kwa kutchinjiriza kwa mzere kapena nthaka yosalimba, ndikofunikira kuzindikira mphamvu yotuluka ndikusintha malire a zochita (nthawi zambiri 30mA mpaka 300mA)