Kodi ntchito ya wophwanyira dera ndi chiyani, mfundo yogwirira ntchito yophwanyira dera ndikulongosola mwatsatanetsatane
Dongosolo likalephera, chitetezo cha chinthu cholakwa ndi kulephera kwa ophwanya dera akukana kuyenda, yendani wophwanya dera loyandikana nalo kudzera pakutetezedwa kwa chinthu cholakwika, ndipo njirayo ingagwiritsidwenso ntchito kupanga waya. ulendo wa distal circuit breaker nthawi yomweyo umatchedwa chitetezo cha circuit breaker failure.
Nthawi zambiri, pambuyo pakuchitapo kanthu kwa magawo apano, magulu awiri oyambira olumikizirana amatuluka, ndipo malo olumikizirana achitetezo akunja amalumikizidwa motsatizana mudera, ulalo wa basi kapena gawo lophwanyira dera kulephera kuyambitsa chitetezo cholephera.
Kodi ntchito za ma circuit breakers ndi ziti
Zowononga ma circuit zimagwiritsidwa ntchito makamaka pama motors pafupipafupi komanso ma transfoma akulu ndi ma substation.Circuit breaker ili ndi ntchito yogawa katundu wangozi, ndipo imagwirizana ndi chitetezo chosiyanasiyana choteteza zida zamagetsi kapena mizere.
Circuit breaker nthawi zambiri imagwiritsidwa ntchito pakuwunikira kotsika-voltage, gawo lamagetsi, limatha kugwira ntchito yongodula dera;dera wosweka ndi kuchulukirachulukira ndi lalifupi chitetezo dera ndi ntchito zina zambiri, koma vuto m'munsi katundu ayenera kukonzedwa ndi disconnecting lophimba limagwira ntchito kudzipatula magetsi, ndi dera wosweka creepage mtunda sikokwanira.
Tsopano pali chowotcha chozungulira chokhala ndi ntchito yodzipatula, chomwe ndi chophwanyira wamba ndi cholumikizira ntchito ziwiri m'modzi.Wowononga dera wokhala ndi ntchito yodzipatula amathanso kukhala cholumikizira thupi.M'malo mwake, cholumikizira cholumikizira nthawi zambiri sichimayendetsedwa ndi katundu, pomwe chotchingira dera chimakhala ndi gawo lalifupi, chitetezo chochulukirapo, kupsinjika ndi ntchito zina zoteteza.
Mfundo yogwirira ntchito ya circuit breaker ndi tsatanetsatane
Mtundu woyambira: Chida chosavuta kwambiri chotetezera dera ndi fusesi.Fuseyi ndi waya woonda kwambiri, wokhala ndi chotchinga choteteza kenako cholumikizidwa ndi dera.Deralo litatsekedwa, mafunde onse ayenera kuyenda kudzera pakalipano pa fusesi -- fuse ngati momwemonso pazigawo zina pagawo lomwelo.Fuseyi imapangidwa kuti izitha kuphatikizika kutentha kwafika pamlingo winawake.Kuboola fuseyi kungayambitse misewu yotseguka kuti madzi asawononge mawaya a nyumba.Vuto la fuseyi ndikuti limatha kugwira ntchito kamodzi kokha.Nthawi zonse fuseyo ikawotchedwa, iyenera kusinthidwa.Ma circuit breakers amatha kugwira ntchito yofanana ndi ma fuse, koma atha kugwiritsidwa ntchito mobwerezabwereza.Pomwepo ikafika pamlingo wowopsa, nthawi yomweyo imayambitsa kuzungulira kotseguka.
Mfundo yoyambira yogwirira ntchito: waya wamoto wozungulira umalumikizidwa ndi malekezero onse a switch.Chosinthiracho chikayikidwa pamalopo, magetsi amatuluka kuchokera pansi, motsatizana kudzera pamagetsi amagetsi, ma foni am'manja, ma static contacts, ndipo pomaliza kuchokera pamwamba.Zamakono zimatha kuchititsa maginito maginito amagetsi.Mphamvu ya maginito yomwe imapangidwa ndi maginito a electromagnetic imawonjezeka ndi panopa, ndipo ngati panopa imachepa.Pamene panopa kudumpha pa mlingo woopsa, zinachitikira EM umapanga lalikulu mokwanira maginito mphamvu kukoka chitsulo ndodo olumikizidwa kwa lophimba kugwirizana.Izi zimapangitsa contactor kusuntha kupendekeka ndi kusiya contactor malo amodzi, ndiye kudula dera.Mphamvu yamagetsi imasokonezedwanso.The bimetal bala lakonzedwa kutengera mfundo yomweyo, kusiyana ndi kuti palibe chifukwa chopatsa mphamvu maginito amagetsi thupi pano, koma amalola kapamwamba chitsulo kupinda pa mlingo mkulu, ndiyeno kuyamba kugwirizana chipangizo.Ena ophwanya madera amadzazanso zophulika kuti asunthire chosinthira.Mphamvu ikadutsa mulingo wina, imayatsa zinthu zomwe zaphulika kenako ndikuyendetsa pisitoni kuti itsegule switch.
Zitsanzo zokwezedwa: Zophulitsa zotsogola kwambiri zimasiya zida zosavuta zamagetsi ndipo m'malo mwake amagwiritsa ntchito zida zamagetsi (zida za semiconductor) kuti aziwunika momwe zilili pano.Ground fault circuit breaker (GFCI) ndi mtundu watsopano wophwanya dera.Wowononga derali sangangoletsa kuwonongeka kwa mawaya a nyumba, komanso kuteteza anthu kuzinthu zamagetsi.
Ntchito yowonjezereka: GFCI imayang'anira nthawi zonse zomwe zikuchitika paziro ndi mizere yamoto mudera.Chilichonse chikakhala bwino, zomwe zili pamizere yonseyi ziyenera kukhala zofanana.Mzere wamoto ukangokhazikika (mwachitsanzo, wina akhudza chingwe chamoto mwangozi), zomwe zili pamotowo zimawonjezeka mwadzidzidzi, pamene zero sizimatero.GFCI imadula dera atangozindikira vutoli kuti apewe kuvulala kwamagetsi.Chifukwa GFCI imatha kuchitapo kanthu popanda kudikirira mpaka pano ikwera kufika pamlingo wowopsa, imachita mwachangu kuposa ophwanya wamba.
Nthawi yotumiza: Aug-24-2022
