Umephuli wojikelezo

I-circuit breaker ibhekisela kwisixhobo sokutshintsha esinokuthi sivale, sithwale kwaye siphule amandla akhoyo phantsi kweemeko zesiphaluka eziqhelekileyo kwaye sinokuvala, ukuthwala kunye nokuqhawula okwangoku phantsi kweemeko zesekethe ezingaqhelekanga ngexesha elithile.Ii-Circuit breakers zihlulwe zibe zii-high-voltage circuit breakers kunye ne-low-voltage circuit breakers ngokobubanzi bokusebenzisa.

Izaphuli zesekethe zingasetyenziselwa ukuhambisa amandla ombane, ukuqala iimotor ezilinganayo, kwaye zikhusele iintambo zombane kunye neenjini.Xa benomthwalo onzima kakhulu okanye i-short-circuit kunye ne-low-voltage iimpazamo, banokunqumla ngokuzenzekelayo isiphaluka.Umsebenzi wayo ulingana nokutshintsha kwe-fuse.Ukudibanisa kunye nokugqithisa kunye ne-underheating relay, njl. Ngaphezu koko, ngokuqhelekileyo akuyimfuneko ukutshintsha amacandelo emva kokuphula i-fault current.Isetyenziswe ngokubanzi.

Ukusasazwa kombane likhonkco elibaluleke kakhulu ekuveliseni, ekuhanjisweni nasekusetyenzisweni kombane.Inkqubo yokuhambisa amandla ibandakanya iinguqu kunye nezixhobo ezahlukeneyo zombane eziphezulu nezisezantsi, kunye ne-low voltage breaker circuit sisixhobo sombane esisetyenziswa ngokubanzi.

Umgaqo wokusebenza:

I-breaker circuit ngokubanzi iqulunqwe yinkqubo yoqhagamshelwano, inkqubo yokucima i-arc, indlela yokusebenza, ukukhululwa, kunye ne-casing.

Xa isiphaluka esifutshane sisenzeka, intsimi yamagnetic eveliswa ngumbane omkhulu (ngokuqhelekileyo i-10 ukuya kumaxesha e-12) yoyisa i-reaction force spring, ukukhululwa kudonsa indlela yokusebenza ukuba isebenze, kwaye utshintsho luhamba ngokukhawuleza.Xa i-overloaded, i-current iba nkulu, isizukulwana sobushushu siyanda, kwaye i-bimetallic sheet ikhubaza kwinqanaba elithile ukukhuthaza isenzo somatshini (inkulu yangoku, ifutshane ixesha lesenzo).

Kukho uhlobo lwe-elektroniki, olusebenzisa i-transformer ukuqokelela okwangoku kwinqanaba ngalinye kwaye lithelekise nexabiso elimiselweyo.Xa ikhoyo ngoku ingaqhelekanga, i-microprocessor ithumela umqondiso ukwenza ukukhutshwa kombane kuqhube indlela yokusebenza ukuze isebenze.

Umsebenzi we-circuit breaker ukunqumla kunye nokudibanisa isiphaluka somthwalo, kunye nokunqumla isiphaluka sesiphambeko, ukukhusela ingozi ekukhuliseni, kwaye uqinisekise ukusebenza okukhuselekileyo.I-high-voltage circuit breaker idinga ukuphula i-1500V arcs kunye ne-current ye-1500-2000A.Ezi arcs zinokolulwa ukuya kwi-2m kwaye ziqhubeke zivutha ngaphandle kokucima.Ngoko ke, ukucima i-arc yingxaki ekufuneka i-high-voltage circuit breakers iyisombulule.

Umgaqo wokuvuthela kwe-arc kunye nokucima i-arc ikakhulu ukupholisa i-arc ukunciphisa ukuchithwa kwe-thermal.Ngakolunye uhlangothi, ukwandisa i-arc ngokuvuthela i-arc ukuqinisa ukuhlanganiswa kunye nokusabalalisa amaqhekeza ahlawulisiweyo, kwaye ngexesha elifanayo, iinqununu ezihlawulisiweyo kwi-gap ye-arc zivuthelwa, kwaye amandla e-dielectric ophakathi abuyiselwe ngokukhawuleza. .

I-low-voltage circuit breakers, eyaziwa ngokuba yi-automatic air switches, ingasetyenziselwa ukucima kunye nokucima iisekethe zomthwalo, kwaye ingasetyenziselwa ukulawula iimoto eziqala ngokungaqhelekanga.Umsebenzi wayo ulingana nesimbuku seminye okanye yonke imisebenzi yezixhobo zombane ezinje ngokutshintsha kweemela, i-overcurrent relay, i-voltage loss relay, i-thermal relay kunye nesikhuseli sokuvuza.Sisixhobo sombane esikhuselayo esibalulekileyo kwinethiwekhi yokuhambisa i-voltage ephantsi.

I-low-voltage circuit breakers inenzuzo yemisebenzi emininzi yokukhusela (umthwalo ogqithisiweyo, i-short-circuit, ukhuseleko olungaphantsi kwe-voltage, njl.), ixabiso lesenzo esilungelelanisiweyo, umthamo ophezulu wokuphulwa, ukusebenza kakuhle, kunye nokhuseleko, ngoko zisetyenziswa ngokubanzi.Isakhiwo kunye nomgaqo wokusebenza I-low-voltage circuit breaker iqulunqwe yindlela yokusebenza, oonxibelelwano, izixhobo zokukhusela (ukukhutshwa okuhlukeneyo), kunye nenkqubo yokucima i-arc.

Abafowunelwa abaphambili be-low-voltage circuit breakers baqhutywa ngesandla okanye bavalwe ngombane.Emva kokuba uqhagamshelwano oluphambili luvaliwe, indlela yohambo lwasimahla ivalela umfowunelwa oyintloko kwindawo evaliweyo.I-coil yokukhutshwa kwe-overcurrent kunye ne-thermal element yokukhululwa kwe-thermal idibaniswe kwichungechunge kunye nesekethe eyintloko, kwaye i-coil yokukhutshwa kwe-undervoltage ixhunywe ngokuhambelana nokunikezelwa kwamandla.Xa isiphaluka sifutshane okanye sigxininiswe kakhulu, i-armature yokukhululwa kwe-overcurrent itsalwa ukuze yenze indlela yokuhamba ngokukhululekileyo, kwaye uqhagamshelwano oluphambili luqhawula isiphaluka esikhulu.Xa i-circuit igcwele kakhulu, i-thermal element yokukhutshwa kwe-thermal iya kufudumala kwaye igobe i-bimetal, ityhale indlela yokukhululwa yamahhala ukuba isebenze.Xa isiphaluka singaphantsi, i-armature ye-undervoltage release ikhutshwe.Kwakhona uvule indlela yohambo lwasimahla.Ukukhutshwa kwe-shunt kusetyenziselwa ulawulo olude.Ngexesha lokusebenza okuqhelekileyo, ikhoyili yayo ivaliwe.Xa kufuneka ulawulo lomgama, cofa iqhosha lokuqala ukunika amandla ikhoyili.

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Iimpawu eziphambili:

Iimpawu ze-breaker circuit ikakhulu ziquka: i-voltage elinganisiweyo i-Ue;ireyithwe ngoku ngaphakathi;ukukhuselwa kwe-overload (Ir okanye i-Irth) kunye nokukhusela i-short-circuit (Im) i-tripping current setting range;ireyithwe kwi-short-circuit breaking current (i-industrial circuit breaker Icu; i-breaker circuit ye-Icn )Yima.

I-Rated Operating Voltage (Ue): Le yi-voltage apho i-circuit breaker isebenza phantsi kweemeko eziqhelekileyo (ezingenakuphazamiseka).

Ireyithiwe yangoku (In): Eli lelona xabiso liphezulu langoku ukuba umaphuli wesekethe exhotyiswe nge-relay ekhethekileyo yohambo oludlulayo anokumelana ngokungenasiphelo kwiqondo lobushushu le-ambient elichazwe ngumenzi, kwaye aliyi kudlula umlinganiselo weqondo lobushushu elichazwe licandelo langoku lokuthwala.

Ixabiso le-relay yohambo lwangoku lwe-short-circuit (Im): I-short-circuit trip relay (ngoko nangoko okanye ukulibaziseka okufutshane) isetyenziselwa ukukhawuleza i-breaker circuit xa ixabiso eliphezulu lesiphoso senzeke, kwaye umda wohambo lwayo ngu-Im.

Ilinganiswe kwi-short-circuit breaking capacity (i-Icu okanye i-Icn): I-short-circuit breaking current ye-circuit breaker ye-circuit breaker iyona nto iphezulu (ekulindeleke) ixabiso langoku elinokuthi i-circuit breaker ingaliphula ngaphandle kokulimala.Amaxabiso akhoyo abonelelwe kumgangatho lixabiso le-rms yecandelo le-AC lempazamo yangoku, kunye necandelo le-DC elidlulayo (elihlala lisenzeka kwimeko emfutshane-imeko embi kakhulu) lithathwa njengoziro xa kubalwa ixabiso eliqhelekileyo. .Iireyithingi ze-Industrial circuit breaker (Icu) kunye ne-house circuit breaker ratings (Icn) zidla ngokunikezelwa nge-kA rms.

Umthamo wokuqhawula isekethe esifutshane (Ics): Umthamo wokuqhawula olinganisiweyo we-breaker wesekethe uhlukaniswe ube ziindidi ezimbini: ireyithwe ekugqibeleni i-short-circuit breaking capacity kunye ne-rated yokusebenza i-short-circuit breaking capacity.


Ixesha lokuposa: May-07-2022