ingxelo ye-Circuit Breakers
I-Circuit Breaker sisixhobo esibalulekileyo kwinkqubo yamandla esetyenziselwa ukukhusela nokulawula iisekethe. Ingavala, ithwale kwaye iphule umbane phantsi kweemeko eziqhelekileyo okanye ezingalunganga. Imisebenzi yayo ephambili ibandakanya ukhuseleko lokugqithisa, ukhuseleko lwe-short-circuit, ukhuseleko lwe-undervoltage, njl. Ilingana nomxube wee-fuse kunye nee-over/under-voltage thermal relays, kodwa inokuthembeka okuphezulu kunye nokusetyenziswa kwakhona.

Iiparameter eziphambili zeempawu
I-voltage elinganisiweyo (Ue): I-voltage ephezulu apho i-circuit breaker isebenza khona ngokuqhelekileyo, njenge-220V, 380V, njl. 37

Umlinganiselo wamandla (In): Ixabiso lamandla ombane eliphezulu elinokuthwalwa ngokukhuselekileyo ixesha elide, ekufuneka libe likhulu kunomlinganiselo wamandla okusebenza wesekethe nge-35%.

Umthamo wokuqhekeza (Icu/Ics): Umthamo wokugqibela wokuqhekeza i-short-circuit (Icu) ubhekisa kubuchule bokuqhekeza umbane we-short-circuit ngexesha elinye. Umthamo wokuqhekeza osebenzayo (Ics) ubhekisa kumda wangoku ongasetyenziswa emva kokuqhekeka. Ngokubanzi, ii-frame circuit breakers zifuna ii-Ics≥50%Icu, kwaye ii-molded case circuit breakers zifuna ii-Ics≥25% ICU.

Umsinga wokumelana nexesha elifutshane (Icw): Amandla esixhobo sokwaphula isekethe okumelana nomsinga wokujikeleza ixesha elifutshane kwixesha elithile ngaphandle komonakalo.

Ii. Uhlu lwee-Circuit Breakers
1. Ngokwenqanaba le-voltage
Iziphuli zesekethe ezine-voltage ephezulu: Zisetyenziswa kwiinkqubo ze-3kV nangaphezulu. Izixhobo zokucima i-arc eziqhelekileyo ziquka i-sulfur hexafluoride (SF6), i-vacuum, i-oyile, njl.njl. 4

Ii-circuit breakers ezisebenzisa i-low-voltage zahlulwe zibe ziintlobo ezintathu: uhlobo lwesakhelo (i-ACB), uhlobo lwe-molded case (i-MCCB), kunye nohlobo lwe-miniature (i-MCB). 57.

2. Ngokwesakhiwo kunye nokusetyenziswa
Isixhobo sokwaphula isekethe yohlobo lwesakhelo (i-ACB)
Umlinganiselo wamandla: 200A ukuya kwi-6300A, ixhotyiswe ngokhuseleko olunezigaba ezine (ukulibaziseka kwexesha elide, ukulibaziseka okufutshane, ukusilela ngoko nangoko, kunye nokusilela komhlaba), isetyenziswa kakhulu ukukhusela iiswitshi eziphambili kwiinkqubo zokusasaza okanye izixhobo ezinomthamo omkhulu.

Isixhobo sokwaphula iisekethe zetyala elibunjiweyo (MCCB)
Ulwakhiwo oluncinci, olunereyithingi yamandla ukusuka kwi-10A ukuya kwi-1600A, lufanelekile kukhuseleko lwesekethe yesebe. I-MCCB ye-elektroniki ixhasa ukhuseleko olukhethiweyo, kwaye ezinye iimodeli zinomsebenzi we-regional interlock 57.

I-Miniature Circuit Breaker (MCB)
Isetyenziswa kwiisekethe zesiphelo ezingaphantsi kwe-125A (ezifana nezasekhaya nezeshishini), ifumaneka kwiinkcukacha ze-1P ukuya kwi-4P, kwaye ixhasa ukhuseleko lokugqithisela, isekethe emfutshane kunye nokuvuza.

3. Cinezela iteknoloji yokucima i-arc
Isixhobo sokuvala i-vacuum circuit: Ukucima i-arc ngokukhawuleza, ubomi benkonzo ende, kufanelekile kwiimeko zokusebenza rhoqo.

I-SF6 circuit breaker: Isebenza kakuhle kakhulu ekugqumeni nasekucimeni i-arc kwaye isetyenziswa kakhulu kwiinkqubo ze-high-voltage. Ubumsulwa begesi kufuneka buvavanywe rhoqo.

Iii. Imigaqo yokukhetha i-Circle Breaker
Tshatisa iiparameter zesekethe
I-voltage elinganisiweyo ≥ i-voltage yomgca, i-current elinganisiweyo ≥ i-load current ephezulu, amandla okuphuka ≥ i-current ye-short-circuit elindelekileyo 57.

Uhlobo lomthwalo oluhlengahlengiswayo
Ukhuseleko lwemoto kufuneka luthathele ingqalelo umsinga wokuqalisa (ixabiso lokuseta uhambo olukhawulezileyo liphindwe kayi-1.35 ukuya kwi-1.7 kumsinga wokuqalisa). Isekethe yokukhanyisa ithatha umsinga womthwalo ophindwe kathandathu wama-78.

Ulungelelwaniso olukhethiweyo
Iziphuli zesekethe eziphezulu nezisezantsi kufuneka zihlangabezane nomahluko wexesha (njengomahluko wesenzo sokulibaziseka okufutshane ≥0.1s) kunye nomahluko wangoku (umlinganiselo wesenzo wenqanaba eliphezulu ≥ ngokuphindwe ka-1.2 kunalowo wenqanaba elisezantsi) ukuze kuthintelwe ukukhubeka okugqithisileyo.

Ukulungelelaniswa kwendalo
Kwiindawo eziphakamileyo, ezifumileyo okanye ezishushu kakhulu, kufuneka kukhethwe iimodeli ezikhethekileyo kwaye umbane olinganisiweyo ulungiswe (kufuneka ukunciphisa amandla xa ubushushu budlula i-40℃). 13.

Iv. Uvavanyo kunye noLondolozo lweSekethe ye-Circuit Breaker
Izinto ezibalulekileyo zovavanyo
Ukumelana nokungaguquguquki koqhagamshelwano: Fumanisa ukulahleka koqhagamshelwano 12.

Uhlalutyo lweempawu zoomatshini: Ixesha lokuvula nelokuvala, isantya kunye nexesha elifanayo 14.

Ukusebenza kokufakwa kwe-insulation: Ukumelana novavanyo lwe-voltage, ukufunyanwa kwe-vacuum degree (kwi-vacuum circuit breakers) 14.

Ukuqinisekiswa komsebenzi wokhuseleko: Ukulinganisa amaxabiso esenzo sokugqitha kakhulu kunye ne-short-circuit tripping 8.

Amanqaku aphambili okugcina
Ukuhlolwa rhoqo: Uxinzelelo lwegesi (i-SF6 circuit breaker), i-contact ablation, i-mechanism lubrication 48.

Uvavanyo lokuthintela: Lwenziwa ngokwemigangatho efana ne-GB/T 1984 kunye ne-GB 14048, kanye emva kweminyaka eli-1 ukuya kwemi-3.

Ukuphathwa kwempazamo: Kwimeko yokunqongophala kweoyile, ubushushu obugqithisileyo okanye ukuqhuma, kufuneka ukwahlulwa okungxamisekileyo kwaye iingxaki zenkqubo yokudibanisa okanye yokucima i-arc kufuneka ziphandwe. 4.

V. Uhlalutyo lweeNgxaki eziQhelekileyo
Umahluko phakathi kwe-circuit breaker kunye ne-disconnector
Isixhumi (QS) sisetyenziselwa kuphela ukwahlukanisa umbane kwaye asinakho ukucima i-arc. I-circuit breaker (QF) inganqumla i-fault current ye-12.

Ukubaluleka kwe-Icu kunye ne-Ics
I-Icu ibonisa amandla okugqibela okuqhekeza, kwaye i-Ics ibonisa ukuthembeka kokusebenza okuqhubekayo. Imigca ephambili igxile kwi-Ics, ngelixa imigca yesebe igxile kwi-Icu8.

Ukukhethwa kwee-current-limited circuit breakers
Tshatisa uxinzelelo lobushushu lwentambo ngegophe elinomda wamandla, kwaye unike kuqala iimodeli ezinesantya sokuphuka esikhawulezayo (ezifana neziphuli zesekethe ye-vacuum) 78.

Ukhuseleko lokuvuza alusebenzi kakuhle
Ngenxa yokwehla kokugquma komgca okanye ukuguguleka okungalunganga, kuyimfuneko ukubona umsinga wokuvuza kunye nokulungisa umda wesenzo (ngokuvamile ukusuka kwi-30mA ukuya kwi-300mA)