maikutlo a Circuit Breakers
Circuit Breaker ke sesebelisoa sa bohlokoa tsamaisong ea matla e sebelisoang ho sireletsa le ho laola lipotoloho. E ka koala, ea jara le ho senya hona joale tlas'a maemo a tloaelehileng kapa a phoso. Mesebetsi ea eona ea mantlha e kenyelletsa ts'ireletso e feteletseng, ts'ireletso ea potoloho e khuts'oane, ts'ireletso ea undervoltage, joalo-joalo E lekana le motsoako oa li-fuse le li-relay tsa mocheso tse fetang/tlase, empa e na le ts'epo e phahameng le ho sebetsa hape.

Likarolo tse ka sehloohong tse khethollang
Rated voltage (Ue) : Matla a phahameng ka ho fetisisa ao motlakase oa motlakase o sebetsang ho ona ka tloaelo, joalo ka 220V, 380V, joalo-joalo 37

Rated current (In) : Theko e phahameng ka ho fetisisa ea hona joale e ka tsamaisoang ka mokhoa o sireletsehileng ka nako e telele, e lokelang ho ba e kholo ho feta ea ho sebetsa ha potoloho ka 35%.

Matla a ho senya (Icu / Ics) : Matla a ho senya nako e khutšoanyane (Icu) e bolela bokhoni ba ho senya nako e telele ea nako e khutšoanyane ka nako e le 'ngoe. Operating breaking capacity (Ics) e bolela moeli oa hajoale o ntseng o ka sebelisoa kamora ho robeha. Ka kakaretso, li-circuit breakers li hloka Ics≥50%Icu, 'me li-case circuit breakers li hloka Ics≥25% ICU.

Nako e khuts'oane ea ho mamella hona joale (Icw) : Bokhoni ba sekhechana sa potoloho ho mamella hona joale ka nako e khuts'oane ka nako e itseng ntle le tšenyo.

Ii. Classification of Circuit Breakers
1. Ka boemo ba motlakase
High-voltage circuit breakers: E sebelisoa mekhoeng ea 3kV le holimo. Mecha ea litaba e tloaelehileng ea ho tima li-arc e kenyelletsa sulfur hexafluoride (SF6), vacuum, oli, joalo-joalo 4.

Li-circuit tsa motlakase tse tlase li arotsoe ka mefuta e meraro: mofuta oa foreimi (ACB), mofuta oa linyeoe tse bōpiloeng (MCCB), le mofuta o monyenyane (MCB). 57.

2. Ka sebopeho le tšebeliso
Sekhechana sa potoloho ea mofuta oa foreimi (ACB
Hajoale e lekantsoeng: 200A ho 6300A, e nang le ts'ireletso ea mekhahlelo e mene (ho lieha nako e telele, ho lieha ha nako e khutšoanyane, hang-hang, le phoso ea fatše), e sebelisoa haholo bakeng sa tšireletso ea li-switches tse kholo tsamaisong ea kabo kapa thepa ea matla a maholo.

Molded case circuit breaker (MCCB
Sebopeho sa Compact, se lekantsoeng hona joale 10A ho 1600A, se loketseng tšireletso ea potoloho ea lekala. MCCB ea elektroniki e ts'ehetsa ts'ireletso e ikhethileng, 'me mefuta e meng e na le ts'ebetso ea interlock ea lebatooa 57.

Sekhahla se senyenyane sa Circuit Breaker (MCB
E sebelisoa lipotolohong tsa terminal tse ka tlase ho 125A (joalo ka tsa malapa le tsa khoebo), tse fumanehang ho 1P ho isa ho 4P, mme e ts'ehetsa ts'ireletso e ngata, potoloho e khuts'oane le ts'ireletso ea ho lutla.

3. Tobetsa theknoloji ea ho tima arc
Vacuum circuit breaker: Ho tima arc ka potlako, bophelo bo bolelele ba ts'ebeletso, bo loketseng maemo a ts'ebetso khafetsa 4.

Sekhechana sa potoloho sa SF6: E na le ts'ebetso e ntle haholo ea ho kenya letsoho le ho tima li-arc mme e sebelisoa haholo lits'ebetsong tse phahameng haholo. Bohloeki ba khase bo hloka ho hlahlojoa khafetsa.

Iii. Melao-motheo ea Khetho ea Sekheo sa Potoloho
Bapisa liparamente tsa potoloho
Lebelo la motlakase ≥ line voltage, rated current ≥ maximum load current, breaking capacity ≥ e lebelletsoeng nako e khutšoanyane ea potoloho ea 57.

Phetoho ea mofuta oa mojaro
Tšireletso ea koloi e hloka ho ela hloko nako ea ho qala (theko ea hang-hang ea ho eta ke 1.35 ho 1.7 makhetlo a ho qala hona joale). Potoloho ea mabone e nka makhetlo a tšeletseng ho feta moroalo oa 78.

Tšebelisano e khethehileng
Li-circuits tse ka holimo le tse tlaase li hloka ho kopana le phapang ea nako (e kang phapang e khutšoanyane ea khato ≥0.1s) le phapang ea hona joale (ketso ea hona joale ea boemo bo ka holimo ≥ makhetlo a 1.2 ea boemo bo tlaase) ho qoba ho khoptjoa ho feta tekanyo.

Ho ikamahanya le maemo a tikoloho
Bakeng sa libaka tse phahameng, tse mongobo kapa tse nang le mocheso o phahameng, ho lokela ho khethoa mehlala e khethehileng 'me ho lokisoe tekanyo ea hona joale (ho hlokahala hore ho fokotsehe ha mocheso o feta 40 ℃). 13.

Iv. Teko ea Circuit Breaker le Tlhokomelo
Lintlha tsa bohlokoa tsa tlhahlobo
Khanyetso e tsitsitseng / e matla ea ho ikopanya: Fumana tahlehelo ea mabitso 12.

Tlhahlobo ea sebopeho sa mochini: Nako ea ho bula le ho koala, lebelo le nako e le 'ngoe 14.

Ts'ebetso ea insulation: E mamelle tlhahlobo ea voltage, tlhahlobo ea boemo ba vacuum (bakeng sa li-circuit breakers) 14.

Netefatso ea ts'ebetso ea ts'ireletso: Tekanyetso ea litekanyetso tse ngata haholo le litekanyetso tsa ts'ebetso ea potoloho e khuts'oane 8.

Lintlha tsa bohlokoa tsa tlhokomelo
Tlhahlobo ea khafetsa: Khatello ea khase (SF6 potoloho ea potoloho), ho fokotsa ho kopana, ho tlotsa mochine 48.

Liteko tsa thibelo: E etsoa ho latela litekanyetso tse kang GB/T 1984 le GB 14048, hang ka mor'a lilemo tse 1 ho isa ho tse 3.

Ho sebetsana le phoso: Haeba ho na le khaello ea oli, ho chesa haholo kapa ho phatloha, ho hlokahala ho itšehla thajana 'me ho lokela ho batlisisoa mathata a amanang le ho kopana kapa mokhoa oa ho tima arc. 4.

V. Tlhahlobo ea Mathata a Tloaelehileng
Phapang pakeng tsa sekhechana sa potoloho le sekonopo
The disconnector (QS) e sebelisoa feela ho arola phepelo ea motlakase 'me ha e na matla a ho tima arc. Sekhechana sa potoloho (QF) se ka khaola motlakase oa 12.

Bohlokoa ba Icu le Ics
Icu e bonahatsa matla a ho qetela a ho senya, 'me Ics e bonahatsa ho tšepahala ha ts'ebetso e tsoelang pele. Mehala e meholo e lebisa tlhokomelo ho Ics, ha mela ea makala e shebane le Icu8.

Khetho ea li-circuit breakers tse fokotsang hona joale
Bapisa khatello ea mocheso oa thapo ka mothinya oa hona joale, 'me u etelle pele mefuta e nang le lebelo le pshatlehang (joalo ka li-vacuum circuit breakers) 78.

Tšireletso ea leakage ha e sebetse hantle
Haholo-holo ka lebaka la ho fokotseha ha li-insulation kapa motheo o fokolang, hoa hlokahala ho lemoha ho lutla ha hona joale le ho lokisa moeli oa ketso (hangata 30mA ho 300mA)