Circuit-breaker

A circuit breaker inoreva chinhu chinochinja chinogona kuvhara, kutakura uye kupaza ikozvino pasi pemamiriro edunhu akajairika uye chinogona kuvhara, kutakura uye kupaza ikozvino pasi pemamiriro edunhu asina kujairika mukati menguva yakatarwa.Circuit breakers yakakamurwa kuita high-voltage circuit breakers uye yakaderera-voltage circuit breaker zvichienderana nekukura kwavo kwekushandisa.

Circuit breaker inogona kushandiswa kugovera simba remagetsi, kutanga asynchronous motors zvisingaite, uye kuchengetedza magetsi emagetsi mitsara uye mota.Kana vaine zvakakomba kuwandisa kana pfupi-dunhu uye pasi-voltage zvikanganiso, ivo vanogona kucheka otomatiki dunhu.Basa rayo rakaenzana nefuse switch.Kusanganiswa nekupisa uye underheating relay, etc. Uyezve, kazhinji hazvidikanwi kushandura zvikamu mushure mekuputsa kukanganisa ikozvino.Rave richishandiswa zvakafara.

Kugovera kwesimba chinhu chakakosha zvakanyanya muchizvarwa, kutapurirana uye kushandiswa kwemagetsi.Iyo magetsi ekugovera sisitimu inosanganisira ma transformer uye akasiyana akakwira uye akaderera voltage emagetsi emagetsi, uye yakaderera voltage circuit breaker chinhu chinoshandiswa zvakanyanya chemagetsi.

Working principle:

A wedunhu breaker anowanzo kuumbwa yekubatanidza system, arc yekudzima system, inoshanda sisitimu, yekuburitsa, uye casing.

Kana dunhu repfupi rikaitika, iyo magineti inogadzirwa neiyo hombe yazvino (kazhinji gumi kusvika gumi nemaviri nguva) inokunda iyo reaction simba chitubu, kuburitswa kunodhonza mashandiro ekuita, uye shanduko inofamba ipapo ipapo.Kana yaremerwa, ikozvino inova yakakura, chizvarwa chekupisa chinowedzera, uye bimetallic sheet inoshandura kune imwe nzvimbo kuti ikurudzire chiito chemaitiro (yakakura ikozvino, ipfupi nguva yekuita).

Iko kune mhando yemagetsi, iyo inoshandisa transformer kuunganidza ikozvino kwechikamu chimwe nechimwe uye inoienzanisa neiyo yakatarwa kukosha.Kana iyo yazvino isina kujairika, iyo microprocessor inotumira chiratidzo kuti iite yemagetsi kuburitsa dhiraivha nzira yekushandisa kuita.

Basa remutsigiri wedunhu nderekucheka uye kubatanidza dunhu remutoro, pamwe nekucheka chikanganiso chedunhu, kudzivirira njodzi kuti iwedzere, uye kuve nechokwadi chekushanda kwakachengeteka.Iyo yepamusoro-voltage circuit breaker inoda kutyora 1500V arcs ine ikozvino ye1500-2000A.Aya ma arcs anogona kutambanudzwa kusvika ku2m uye anoramba achipisa pasina kudzimwa.Naizvozvo, kudzimisa arc idambudziko iro repamusoro-voltage redunhu mabreaker rinofanira kugadzirisa.

Iyo musimboti wekuvhuvhuta arc uye kudzima arc inonyanya kutonhodza arc kudzikisa kupisa kuparadzaniswa.Kune rumwe rutivi, kurebesa arc nekufuridza arc kusimbisa kubatanidzwa uye kupararira kwezvimedu zvinochaja, uye panguva imwecheteyo, zvidimbu zvinochajiswa muarc gap zvinopeperetswa, uye simba re dielectric repakati rinodzoreredzwa nekukurumidza. .

Low-voltage circuit breakers, inozivikanwawo seotomatiki mhepo inochinja, inogona kushandiswa kubatidza nekudzima maseketi ekutakura, uye inogona kushandiswa kudzora mota dzinotanga zvisingaite.Basa rayo rakaenzana nehuwandu hwemamwe kana ese mabasa emidziyo yemagetsi senge banga switch, overcurrent relay, voltage kurasikirwa relay, thermal relay uye leakage protector.Icho chinhu chakakosha chekudzivirira chemagetsi chinoshandiswa mu low-voltage distribution distribution network.

Low-voltage circuit breakers ine zvakanakira mabasa akawanda ekudzivirira (kuremedza, pfupi-circuit, under-voltage dziviriro, nezvimwewo), inogadziriswa chiitiko kukosha, yakakwira yekutyora, kushanda kuri nyore, uye chengetedzo, saka inoshandiswa zvakanyanya.Chimiro uye musimboti wekushanda Iyo yakaderera-voltage yedunhu breaker inoumbwa neanoshanda masisitimu, anobatika, maturusi ekudzivirira (akasiyana kuburitswa), uye arc yekudzima system.

Iwo makuru ekubatika e low-voltage circuit breakers anoshandiswa nemaoko kana kuvharwa nemagetsi.Mushure mekunge iyo huru yekubata yakavharwa, iyo yemahara yekufamba michina inovhara iyo huru yekusangana munzvimbo yakavharwa.Iyo coil yekusunungurwa kwepamusoro uye chinhu chinopisa chekusunungurwa kwekushisa chakabatanidzwa mumutsara nedunhu guru, uye coil ye undervoltage release inobatanidzwa mukuenderana nemagetsi.Kana iyo dunhu iri pfupi-yakatenderedzwa kana yakanyanyisa kuremerwa, iyo armature yekuburitswa kwepamusoro inodhonzwa mukati kuti iite yemahara rwendo mechanisheni kuita, uye iyo huru yekubata inobvisa iyo huru yedunhu.Kana iyo dunhu yaremerwa, iyo inopisa chikamu cheiyo thermal kusunungurwa ichapisa uye inokotama bimetal, ichisundira iyo yemahara yekuburitsa nzira kuti iite.Kana iyo yedunhu iri undervoltage, iyo armature ye undervoltage kuburitswa inoburitswa.Uyewo shandisa nzira yekusununguka yekufamba.Iyo shunt kuburitswa inoshandiswa kuremote control.Panguva yekushanda kwakajairika, coil yayo inodzimwa.Kana kuremerwa kuri kudiwa, tinya bhatani rekutanga kuti upe simba coil.

Main features:

Mamiriro emupunzi wedunhu anonyanya kusanganisira: rated voltage Ue;rated current In;kudzivirirwa kwekuremerwa (Ir kana Irth) uye pfupi-circuit dziviriro (Im) kutsika ikozvino kuseta renji;rated short-circuit breaking current (industrial circuit breaker Icu; house circuit breaker Icn )Mirira.

Yakatemerwa Operating Voltage (Ue): Iyi ndiyo voltage iyo inotyora wedunhu inoshanda pasi pezvakajairwa (zvisina kukanganiswa).

Rated current (In): Uhwu ndihwo hukoshi hwepamusoro hwazvino hwekuti muparadzi wedunhu akashongedzerwa neanokosha overcurrent rwendo relay anogona kumira nekusingaperi pane ambient tembiricha yakataurwa nemugadziri, uye haizopfuure tembiricha inotarwa nechikamu chezvino chinotakura.

Short-circuit relay rwendo ikozvino kugadzika kukosha (Im): Iyo pfupi-yedunhu rwendo relay (pakarepo kana kupfupi-kunonoka) inoshandiswa kukurumidza kutsika muvhari wedunhu kana yakakwira kukanganisa ikozvino kukosha, uye rwendo rwayo muganhu iIm.

Rated short-circuit breaking capacity (Icu or Icn): The rated short-circuit breaking current of a circuit breaker ndiyo yepamusoro-soro (inotarisirwa) ikozvino kukosha iyo muparadzi wedunhu anogona kupaza pasina kukuvara.Ikozvino tsika dzakapihwa muyero ndeye rms kukosha kweiyo AC chikamu chekukanganisa ikozvino, uye iyo DC yenguva pfupi chikamu (inogara ichiitika mune yakaipisisa-kesi pfupi-circuit) inofungidzirwa kuve zero kana ichiverenga kukosha kwakajairika. .Industrial circuit breaker ratings (Icu) uye yeimba yedunhu redunhu ratings (Icn) inowanzopihwa mu kA rms.

Short-circuit breaking capacity (Ics): Iyo yakatemerwa yekutyora simba yedunhu inopwanya yakakamurwa kuita mhando mbiri: yakayerwa yekupedzisira-yepfupi-yedunhu kutyora kugona uye yakayerwa kushanda pfupi-yedunhu kutyora kugona.