rondedzero yeCircuit Breakers
Circuit Breaker chishandiso chakakosha mumagetsi chinoshandiswa kudzivirira nekudzora macircuit. Chinogona kuvhara, kutakura nekupwanya magetsi mumamiriro ezvinhu akajairwa kana asina kunaka. Mabasa ayo makuru anosanganisira kudzivirira overload, short-circuit protection, undervoltage protection, nezvimwewo. Yakaenzana nemusanganiswa wemafuse uye over/under-voltage thermal relays, asi ine kuvimbika kwakanyanya uye inogona kushandiswazve.

Main hunhu parameters
Voltage yakayerwa (Ue): Voltage yepamusoro iyo circuit breaker inoshanda nayo, yakaita se220V, 380V, nezvimwewo. 37

Rated current (In) : Kukosha kwemagetsi kwakakwirira kunogona kutakurwa zvakachengeteka kwenguva yakareba, iyo inofanira kunge yakakura kupfuura simba rekushanda redunhu ne35%.

Kugona kupwanya magetsi (Icu/Ics): Kugona kupwanya magetsi kwenguva pfupi (Icu) kunoreva kugona kupwanya magetsi enguva pfupi panguva imwe chete. Kugona kupwanya magetsi (Ics) kunoreva chiyero chemagetsi chinogona kushandiswa mushure mekupwanya magetsi. Kazhinji, ma "frame circuit breakers" anoda Ics≥50%Icu, uye ma "molded case circuit breakers" anoda Ics≥25% ICU.

Mhepo inomira kwenguva pfupi (Icw): Kugona kwemuchina unopwanya dunhu kutsungirira mhepo inomira kwenguva pfupi mukati menguva yakatarwa pasina kukuvara.

Ii. Kupatsanurwa kweMacircuit Breakers
1. Nedanho remagetsi
Ma "high-voltage circuit breakers": Anoshandiswa muma "systems" ane simba re3kV zvichikwira. Midziyo yekudzimisa arc inowanzo sanganisira sulfur hexafluoride (SF6), vacuum, oiri, nezvimwewo.

Ma "low-voltage circuit breakers" akakamurwa kuita mhando nhatu: rudzi rwefuremu (ACB), rudzi rwe "molded case" (MCCB), uye rudzi rwe "miniature type" (MCB). 57.

2. Nemaumbirwo uye mashandisirwo
Chinopwanya dunhu remhando yefuremu (ACB)
Rated current: 200A kusvika 6300A, ine dziviriro yezvikamu zvina (kunonoka kwenguva refu, kunonoka kwenguva pfupi, kukanganisa kwepakarepo, uye ground fault), inonyanya kushandiswa kuchengetedza main switch muma distribution systems kana michina yakakura.

Muchina wekupwanya dunhu wakaumbwa (MCCB)
Chimiro chidiki, chine mwero wemagetsi kubva pa10A kusvika 1600A, chakakodzera kuchengetedzwa kwedunhu rebazi. Iyo MCCB yemagetsi inotsigira dziviriro yakasarudzwa, uye mamwe mamodheru ane regional interlock function 57.

Chinopwanya Dunhu Chidiki (MCB)
Inoshandiswa muma terminal circuits ari pasi pe 125A (akadai seemumba nedzemabhizinesi), inowanikwa mu 1P kusvika 4P specifications, uye inotsigira overload, short circuit uye leak protection.

3. Dzvanya tekinoroji yekudzima arc
Muchina wekupwanya dunhu: Kudzima simbi nekukurumidza, hupenyu hurefu, hwakakodzera kushandiswa kakawanda.

SF6 circuit breaker: Ine insulation yakanaka uye arc-extinguishing performance uye inonyanya kushandiswa mumasystem ane voltage yakawanda. Kuchena kwegasi kunofanirwa kuongororwa nguva nenguva.

III. Nheyo dzeSarudzo yeCircuit Breaker
Match parameters edunhu
Voltage yakayerwa ≥ voltage yemutsara, current yakayerwa ≥ load current yepamusoro, kugona kutyoka ≥ short-circuit current inotarisirwa 57.

Kugadziriswa kwemhando yemutoro
Dziviriro yemota inofanira kufunga nezve starting current (inokurumidza trip setting value is 1.35 kusvika 1.7 times starting current). Lighting circuit inotora load current katanhatu pane 78 current.

Kurongeka kwekusarudza
Ma "circuit breakers" epamusoro nepazasi anofanira kusangana nemusiyano wenguva (semusiyano we "short-delay action" ≥0.1s) nemusiyano we "current" ( "action current" ye "top level" ≥ ka1.2 kupfuura "low level") kudzivirira kudonha kwepamusoro.

Kuchinjika kwezvakatipoteredza
Kune nzvimbo dzakakwirira, dzine hunyoro kana tembiricha yepamusoro, mhando dzakakosha dzinofanira kusarudzwa uye magetsi akayerwa anogadziriswa (kudzikiswa kwesimba kunodiwa kana tembiricha yadarika 40℃). 13.

Iv. Kuedzwa uye Kugadziriswa kweCircuit Breaker
Zvinhu zvikuru zvekuyedza
Kuramba kusangana kwakasimba/kwakasimba: Tsvaga kurasikirwa kwekubatana 12.

Kuongorora hunhu hwemakanika: Nguva yekuvhura nekuvhara, kumhanya uye panguva imwe chete 14.

Kushanda kwekudzivirira: Kutsungirira bvunzo yemagetsi, kuonekwa kwedhigirii re vacuum (yevacuum circuit breakers) 14.

Kusimbiswa kwebasa rekudzivirira: Kuenzanisa huwandu hwezvinhu zvinorema uye zvinokanganisa kufamba kwemhepo 8.

Pfungwa huru dzekugadzirisa
Kuongorora nguva dzose: Kumanikidzwa kwegasi (SF6 circuit breaker), kubatwa kwemagetsi, kunyorovesa michina 48.

Miedzo yekudzivirira: Inoitwa zvichienderana nezvinodiwa zvakaita seGB/T 1984 neGB 14048, kamwe chete pagore rimwe kusvika matatu.

Kugadzirisa zvikanganiso: Kana mafuta ashomeka, kupisa zvakanyanya kana kuputika, kupatsanurwa kwechinhu nekukurumidza kunodiwa uye matambudziko ane chekuita nemagetsi kana arc extinguisher system anofanira kuongororwa. 4.

V. Kuongororwa kweMatambudziko Akajairika
Musiyano uripo pakati pecircuit breaker nechinobvisa magetsi
Chinobvisa magetsi (QS) chinoshandiswa chete kuparadzanisa magetsi uye hachina simba rekudzima magetsi. Chinobvisa magetsi (QF) chinogona kudzima magetsi emagetsi kusvika pa12.

Kukosha kweIcu neIcs
Icu inoratidza kugona kwayo kupwanya zvinhu, uye Ics inoratidza kuvimbika kwekushanda kwayo nguva dzose. Mitsetse mikuru inotarisa paIcs, nepo mitsetse yebazi ichitarisa paIcu8.

Kusarudzwa kwema "current-limiting circuit breakers"
Enzanisa kushushikana kwekupisa kwetambo kuburikidza necurrent-limiting current, uye isa pamberi mamodheru ane kumhanya kwekupwanya nekukurumidza (senge vacuum circuit breakers) 78.

Dziviriro yekubuda kwemvura haina kushanda zvakanaka
Zvikurukuru nekuda kwekudzikira kwekudzivirira kwetambo kana kusasimba zvakanaka kwepasi, zvakakosha kuona kubuda kwemvura uye kugadzirisa chiyero chebasa (kazhinji kubva pa30mA kusvika 300mA)