Lub tshuab hluav taws xob feem ntau muaj cov kab sib tiv tauj, ib qho arc - tua hluav taws xob, lub tshuab ua haujlwm, ib qho chaw mus ncig, thiab qhov chaw kaw.
Thaum lub sij hawm luv luv, cov hlau nplaum tsim los ntawm lub siab tam sim no (feem ntau 10 mus rau 12 npaug ntawm qhov ntsuas tam sim no) kov yeej lub zog ntawm kev tiv thaiv - quab yuam caij nplooj ntoos hlav; chav tsev mus txawv tebchaws ces actuates lub operating mechanism, ua rau lub hloov mus rau instantaneously. Thaum lub sij hawm overload, tam sim no nce, ua rau intensified tshav kub tsim; cov bimetallic strip deforms rau ib qho twg, ua rau lub tshuab ua kom muaj zog (qhov siab dua tam sim no, lub sijhawm teb luv dua).
Kuj tseem muaj hluav taws xob- hom hluav taws xob hluav taws xob, uas siv cov hloov pauv tam sim no los ua piv txwv qhov ntsuas tam sim no hauv txhua theem thiab muab piv rau tus nqi preset. Thaum kuaj pom qhov txawv txav tam sim no, lub microprocessor teeb tsa lub teeb liab uas ua rau lub tshuab hluav taws xob mus ncig, yog li tsav lub tshuab ua haujlwm.
Lub luag haujlwm ntawm lub Circuit Court breaker yog txuas thiab disconnect load circuits, nrog rau kev cuam tshuam kev cuam tshuam Circuit Court, yog li tiv thaiv kev sib tsoo ntawm kev sib tsoo thiab ua kom muaj kev nyab xeeb. High-voltage circuit breakers, tshwj xeeb tshaj yog, yuav tsum muaj peev xwm cuam tshuam cov hluav taws xob arcs uas muaj qhov hluav taws xob txog li 1500V thiab tam sim no ntawm 1500 txog 2000A; cov arcs tuaj yeem elongate mus rau qhov ntev txog li 2 meters thaum txuas ntxiv hlawv yam tsis muaj kev tua. Yog li ntawd, arc extinguishing yog ib qho kev sib tw tseem ceeb uas siab -voltage circuit breakers yuav tsum daws tau zoo.
Lub hauv paus ntsiab lus tom qab arc tshuab thiab tua feem ntau yog ua kom txias lub arc kom attenuate thermal ionization. Tsis tas li ntawd, los ntawm kev siv arc tshuab kom elongate lub arc, lub recombination thiab diffusion ntawm them hais yog kho kom zoo dua; Tib lub sijhawm, cov khoom siv hluav taws xob nyob hauv qhov sib txawv arc yog dispersed, yog li sai rov qab lub zog dielectric ntawm qhov nruab nrab insulating.
Tsawg-voltage circuit breakers, tseem hu ua lub tshuab hluav taws xob tsis siv neeg, ua haujlwm rau kev sib txuas thiab tshem tawm cov khoom siv hluav taws xob thiab tseem tuaj yeem siv los tswj cov tshuab hluav taws xob uas tsis tshua muaj pib. Ua haujlwm tau zoo, lawv sawv cev rau cov peev txheej ua ke- ib feem lossis tag nrho- ntawm ntau yam khoom siv hluav taws xob xws li riam hloov, overcurrent relays, undervoltage relays, thermal relays, thiab cov khoom siv tam sim no (tshuaj tiv thaiv); xws li, lawv yog ib qho tseem ceeb tiv thaiv ntaus ntawv nyob rau hauv qis -voltage fais fab faib tes hauj lwm.
Tsawg-voltage circuit breakers muaj ntau qhov zoo, suav nrog ntau yam kev tiv thaiv (xws li kev tiv thaiv ntau dhau, luv- Circuit Court, thiab kev tiv thaiv undervoltage), kho qhov chaw mus txawv tebchaws, muaj peev xwm tawg tau yooj yim, kev ua haujlwm yooj yim, thiab cov yam ntxwv muaj kev nyab xeeb, uas yog vim li cas lawv thiaj li tau siv dav heev. Hais txog cov qauv thiab kev khiav hauj lwm hauv paus ntsiab lus, qhov tsawg-voltage Circuit Court breaker muaj xws li kev khiav hauj lwm mechanism, hu, tiv thaiv cov cuab yeej (ntau hom mus txawv tebchaws units), thiab ib tug arc-extinguishing system.
Cov kev sib cuag tseem ceeb ntawm qhov qis -voltage circuit breaker raug kaw los ntawm manually lossis los ntawm kev kaw hluav taws xob. Thaum cov neeg sib cuag tseem ceeb tau kaw lawm, qhov pub dawb -txoj kev mus ncig ua haujlwm kaw lawv hauv txoj haujlwm kaw. Lub coil ntawm lub overcurrent mus txawv tebchaws chav tsev thiab lub thermal caij ntawm lub thermal mus txawv tebchaws chav tsev yog kev cob cog rua nyob rau hauv series nrog lub ntsiab Circuit Court, thaum lub coil ntawm undervoltage mus txawv tebchaws chav tsev yog kev cob cog rua nyob rau hauv parallel nrog lub hwj chim mov. Nyob rau hauv qhov kev tshwm sim ntawm ib tug luv luv Circuit Court los yog hnyav overload, lub armature ntawm lub overcurrent mus txawv tebchaws chav tsev yog attracted; qhov no ua rau kev ua haujlwm pub dawb - mus txawv tebchaws, ua rau cov neeg sib txuas lus tseem ceeb rau kev txiav lub hauv paus loj. Thaum lub Circuit Court yog overloaded, lub thermal caij ntawm thermal mus txawv tebchaws chav tsev heats li, ua rau lub bimetallic sawb khoov thiab ua rau lub free-trip mechanism. Thaum lub Circuit Court ntsib ib tug undervoltage mob, lub armature ntawm undervoltage mus txawv tebchaws unit tso tawm, li no kuj actuating lub free-trip mechanism. Lub shunt mus txawv tebchaws pab lub hom phiaj ntawm kev tswj chaw taws teeb; Thaum lub sijhawm ua haujlwm ib txwm, nws lub kauj tseem tsis muaj zog, tab sis thaum yuav tsum tau tswj cov chaw taws teeb, lub pob pib yog nias kom muaj zog lub kauj.