A umephuli wojikelezosisixhobo sombane esiqhele ukusetyenziswa kwiisekethe ze-AC.Imodeli eluncedo ngokuqhelekileyo yenziwe ngoqhagamshelwano olususwayo, umfowunelwa oshukumayo kunye nomfowunelwa omileyo.Kwisekethe, imodeli yoncedo inokunqumla umbane, idibanise umbane kwaye ikhusele izixhobo zombane.Ngokwesakhiwo sayo kunye nomgaqo wokusebenza, unokwahlulwa ubeumephuli wesiphaluka senqanaba elinye, i-breaker circuit breaker yesigaba sesithathu kunyei-air circuit breaker.I-Circuit breaker, njengesixhobo sokuphazamisa phakathi kwesiphaluka solawulo kunye nokunikezelwa kwamandla, idlala indima ebalulekileyo kwigridi yamandla.Xa umthwalo wesiphaluka, isiphaluka esifutshane kunye nezinye iimpazamo, ukukhuselwa kwesenzo sombane kwangexesha kuya kunqunyulwa, ukuze isekethe ivuleke ukukhusela ukhuseleko lomntu kunye nepropati kunye nezinye izixhobo emonakalweni.Ngoko keumephuli wojikelezoesetyenziswa ngokubanzi kwinkqubo yamandla ikwabizwa ngokuba “ngumkhuseli ongaphezulu-undervoltage” okanye “ifuse”.Omnye wemisebenzi ebalulekileyo kukunqumla ngokuzenzekelayo unikezelo lwamandla xa kukho isiphaluka esifutshane.
Umgaqo wokusebenza
Xa i-AC yangoku ngoqhagamshelwano lwe-breaker circuit, umtsalane we-electromagnetic, uqhuba isenzo sendlela yokusebenza, ukuze i-breaker circuit breaker ikhuphe ukukhubeka, ngaloo ndlela ukusika isiphaluka.
Ngomsebenzi, isixhobo sokulibaziseka sinokudibaniswa ukwenzela ukuba isiphaluka sinokuqhawulwa kuphela emva kokuba umsebenzi wokutshintsha ugqitywe ngexesha elimiselweyo.
Xa i-short-circuit current idlula kwi-breaker circuit, isinyithi esikufutshane noqhagamshelwano siyanyibilika kwaye sikhutshwe ngokukhutshwa kwe-thermal ngenxa ye-arc kinetic yamandla kunye nobushushu obunzulu obuveliswa yi-melting of the contact, ngaloo ndlela inqumle i-current.
Xa umbane wombane uvaliwe okanye isiphaluka esixhunywe kuyo asiphumeleli, i-breaker circuit inokuphula isiphaluka ngexesha elifutshane.
Ngokwefom yesakhiwo yahlulwe yaba zithathu ezisisigxina, ezihambayo kunye nezinqunyanyisiweyo.
Ngokwendlela yokukhulula yahlulwe kwiifom zencwadana kunye nombane ezimbini.
Ngokwendlela yokusebenza inokwahlulwa ibe yibhanti yokuhanjiswa kwaye akukho bhanti yokuhanjiswa kweentlobo ezimbini;
Ukuhlelwa
(1)Izaphuli zeseketheinokohlulwa ibe yivacuum interrupter chamber (VHV), i-arc interrupter gate (AVR), ivacuum release (VSD) kunye nevacuum contactor ngokutsho kwe-arc interrupter.
(2) Abaphuli beesekethe bangahlulwa babe ziindidi ezintathu: i-single-phase circuit breaker, i-three-phase circuit breaker kunye ne-air circuit breaker.
(3) I-air circuit breakers ingahlulwa ibe yintlobo ezimbini, i-AC kunye ne-DC, ngokuhambelana nabasebenzisi kunye neendawo ezahlukeneyo zokusetyenziswa.
(4) I-breaker circuit inokudibaniswa nebhanki ye-air capacitor, i-inductor yomoya kunye nezinye izixhobo zombane ngokwendlela yokufakela, kwaye ingasetyenziselwa njengesixhobo sombane sokukhusela.
(5) Zihlelwe ngaphaya kohlobo lokhuseleko lwangoku, uhlobo lokukhusela i-short-circuit kunye nohlobo lokukhusela olungaphantsi kwe-voltage ngokweempawu zabo zokukhusela.
(6) Kukho i-100V yochungechunge lwe-voltage yenjongo jikelele yomoya kunye namabakala angoku ngokuhambelana nombane wabo olinganisiweyo kunye namaxabiso angoku.
Ipharamitha yokuchaza
Uhlobo lwe-breaker circuit lufana nezinye izixhobo zombane, ezifana nekhowudi eyenziwe ngoonobumba "P", "Y" kunye namadijithi okutshintshwa kokusasazwa, kunye nekhowudi eyenziwe yileta "C" kunye namadijithi okutshintsha kweemela. , njl., kodwa imisebenzi kunye nezakhiwo zabo ngokucacileyo zahlukile kwaye ngokubanzi azinakusetyenziselwa iinjongo eziqhelekileyo.Thatha i-ZF6 kunye ne-ZF14 umzekelo.
I-2) I-voltage elinganisiweyo: ibhekisela kwixabiso elilinganiselweyo elinokuthi i-breaker circuit ikwazi ukuthwala phantsi kwe-frequency elinganisiweyo (50Hz) kunye ne-frequency elinganisiweyo (25Hz).
I-3) I-rate yangoku: ibhekisela kubuninzi bokusebenza ngoku ukuba i-breaker circuit ingakwazi ukumelana phantsi kweemeko ezichaziweyo.
4. "Umthamo wokuqhawula" kuthetha ukuba i-breaker circuit inokuqhawula ngokuthembekileyo i-AC 50Hz okanye i-DC 1000V okanye ngaphantsi kweemeko ezimiselweyo, kwaye ixesha lokuqhawula aliyi kudlula i-5ms.
5) Iimpawu zokusebenza
Umgaqo wokukhetha
1. Yahlulwe yaba:
(1) Abaphuli beesekethe zesigaba esinye babhekisa kwezo zisetyenziselwa ukukhuselwa kweesekethe, iimoto kunye nezinye izixhobo zombane.I-breaker circuit inenzuzo yokusebenza ngokungaqhelekanga kunye nokulula, kodwa kuyafuneka ukuba kunqunyulwe ukunikezelwa kwamandla ngexesha xa umgca kunye nemoto zigqithisekile okanye zifutshane ukukhusela ingozi ekukhuliseni.Ngoko ke, i-breaker circuit kufuneka ihlangabezane neemfuno zokuqhawula ukunikezelwa kwamandla ngaphakathi kwexesha elimiselweyo, kunye nexesha elifutshane lokuqhawula, ukukhetha okulungileyo kunye nokunye.
(2) Igama elithi "isigaba sesithathu se-AC i-low-voltage circuit breaker" ibhekisela kwi-breaker circuit esetyenziselwa ukhuseleko lweemoto kunye neesekethe zokulawula, ezinomsebenzi ofanayo kunye nesigaba esisodwa sesiphaluka, kodwa yongeze iswitshi yokuqhawula ubume bangaphakathi besixhobo sombane ukuze kuhlangatyezwane neemfuno zokukhusela iinjini kunye neesekethe zolawulo kwiisekethe ze-AC.Ukongeza, ikwanayo ne-overload relay, i-undervoltage relay kunye ne-zero ngokulandelelana kwe-relay yangoku.
Ixesha lokuposa: Feb-17-2023