Txoj Cai Ua Haujlwm ntawm Circuit Breaker

lub tshuab hluav taws xobfeem ntau yog tsim los ntawm ib lub kaw lus sib cuag, ib lub kaw lus tua hluav taws xob, ib lub tshuab ua haujlwm, ib chav mus ncig, thiab ib lub plhaub.
Lub luag haujlwm ntawm lub tshuab hluav taws xob yog txiav thiab txuas lub voj voog thauj khoom, thiab txiav lub voj voog tsis ua haujlwm, kom tiv thaiv kev nthuav dav ntawm qhov xwm txheej thiab xyuas kom muaj kev nyab xeeb. Lub tshuab hluav taws xob siab-voltage yuav tsum tawg 1500V, thiab tam sim no yog 1500-2000A arc, thiab cov arcs no tuaj yeem ncab mus rau 2m thiab tseem txuas ntxiv hlawv yam tsis tau tua hluav taws. Yog li ntawd, arc tua hluav taws yog qhov teeb meem uas yuav tsum tau daws rau cov tshuab hluav taws xob siab voltage.
Cov cuab yeej hluav taws xob qis, tseem hu ua tsis siv neegcua hloov, siv tau los qhib thiab kaw cov voj voog thauj khoom, thiab kuj siv tau los tswj cov cav uas tsis tshua pib. Nws txoj haujlwm yog sib npaug rau qhov sib sau ua ke ntawm qee lossis tag nrho cov haujlwm ntawm riam hloov, over-current relay, voltage loss relay, thermal relay thiab leakage protector. Nws yog ib qho khoom siv tiv thaiv tseem ceeb hauv lub network faib hluav taws xob qis.
Cov cuab yeej hluav taws xob qis muaj ntau yam kev tiv thaiv (overload,luv luv, kev tiv thaiv tsis muaj zog, thiab lwm yam), tus nqi ua haujlwm hloov kho tau, muaj peev xwm tawg siab, ua haujlwm yooj yim, kev nyab xeeb, thiab lwm yam, yog li lawv tau siv dav. Cov qauv thiab cov hauv paus ntsiab lus ua haujlwm Lub tshuab hluav taws xob qis-voltage yog tsim los ntawm cov txheej txheem ua haujlwm, kev sib cuag, cov khoom siv tiv thaiv (ntau yam tso tawm), lub kaw lus tua hluav taws xob arc thiab lwm yam.
Qhov chaw tiv tauj tseem ceeb ntawm lub tshuab hluav taws xob qis-voltage raug kaw manually lossis hluav taws xob. Tom qab qhov chaw tiv tauj tseem ceeb raug kaw, lub tshuab tripping dawb xauv qhov chaw tiv tauj tseem ceeb rau hauv qhov chaw kaw. Lub kauj ntawm qhov tso tawm overcurrent thiab lub thermal element ntawm qhov tso tawm thermal tau txuas nrog ua ke nroglub voj voog tseem ceeb,thiab lub kauj ntawm qhov tso tawm tsis muaj zog txuas nrog lub hwj chim. Thaum lub voj voog luv luv lossis hnyav dhau, lub armature ntawm qhov tso tawm ntau dhau yuav rub kom ua rau lub tshuab tripping dawb ua haujlwm, thiab lub ntsiab sib cuag yuav txiav lub voj voog tseem ceeb. Thaum lub voj voog overloaded, lub thermal element ntawm qhov tso tawm thermal yuav tsim cua sov los khoov daim ntawv bimetal, thawb lub tshuab tso tawm dawb kom ua haujlwm. Thaum lub voj voog tsis muaj zog, lub armature ntawm qhov tso tawm tsis muaj zog raug tso tawm. Kuj tseem ua kom lub tshuab tripping dawb ua haujlwm. Lub shunt tso tawm siv rau kev tswj chaw taws teeb. Thaum lub sijhawm ua haujlwm ib txwm, nws lub kauj raug tua. Thaum xav tau kev tswj qhov deb, nias lub pob pib kom muaj zog rau lub kauj.