Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm Circuit Court breaker yog dab tsi?

Lub hauv paus ntsiab lus ua haujlwm ntawm aCircuit Court breakerrevolves nyob ib ncig ntawm lub ntsiab logic ntawm kev saib xyuas, kev txiav txim, thiab kev ua. Los ntawm nws cov built-in tripping mechanism thiab arc-extinguishing system, nws ua tiav ib qho kev sib txuas ntawm Circuit Court thiab disconnection tswj thiab cuam tshuam sai ntawm faulty circuits. Tshwj xeeb, nws tuaj yeem muab faib ua hom kev ua haujlwm ib txwm muaj thiab hom kev tiv thaiv txhaum. Lub arc-extinguishing system yog ib qho tseem ceeb auxiliary mechanism kom ntseeg tau tias kev poob qis.

Thaum lub Circuit Court muaj kev txhaum xws li overload, luv luv Circuit Court, los yog undervoltage, lub built-in mus txawv tebchaws unit ua rau lub locking mechanism rau account, ua tiav tsis siv neeg tripping. Cov kev ua txhaum sib txawv sib haum rau cov ntsiab cai sib txawv:

Kev tiv thaiv overload (Thermal Tripping Txoj Cai)

Core Component: Bimetallic sawb (ua los ntawm ob daim hlau nrog cov coefficients sib txawv ntawm thermal expansion nias ua ke).

Ua hauj lwm Logic: Thaum lub Circuit Court yog overloaded, tam sim no tsis tu ncua tshaj tus nqi ntsuas, ua rau lub bimetallic sawb khoov thiab deform vim tshav kub. Thaum lub deformation nce mus txog qhov pib, nws thawb lub ntsuas phoo mechanism kom qhib, thiab qhov kev sib cuag txav mus ua txhaum lub voj voog nyob rau hauv qhov kev txiav txim ntawm lub caij nplooj ntoos hlav.

Nta: Ua haujlwm qeeb; luv luv overloads (xws li pib lub cev muaj zog) yuav tsis ua rau tripping, tsis txhob dag tripping.

Kev tiv thaiv luv luv (Electromagnetic Tripping Principple)

Core Component: Electromagnetic coil (qhov txhab nyob ib ncig ntawm cov tub ntxhais hlau).

Kev Ua Haujlwm Logic: Thaum lub caij luv luv tshwm sim, tam sim no surges instantaneously mus rau kaum los yog ntau pua lub sij hawm tus nqi ntsuas. Lub tshuab hluav taws xob hluav taws xob tsim hluav taws xob muaj zog hluav taws xob, nyiam cov tub ntxhais hlau los tawm tsam lub tshuab xauv, tam sim qhib lub voj voog.

Nta: Millisecond-theem nrawm nrawm, muaj peev xwm txiav tawm Circuit Court hauv lub sijhawm luv luv, tiv thaiv arc hlawv rau cov khoom siv lossis ua rau hluav taws kub.

Undervoltage / Poob-of-Voltage Protection (Undervoltage Tripping Principple)

Core Component: Undervoltage mus txawv tebchaws coil, txuas nrog nyob rau hauv parallel hauv Circuit Court los saib xyuas qhov voltage.

Kev Ua Haujlwm Logic: Thaum qhov hluav taws xob poob qis dua li ntawm 70% ntawm tus nqi ntsuas lossis poob tag nrho, lub zog hluav taws xob ntawm lub voj voog mus ncig yuav ploj, thiab cov tub ntxhais hlau, nyob rau hauv qhov kev txiav txim ntawm lub caij nplooj ntoos hlav, ua rau lub xauv mechanism kom qhib, txiav tawm hauv Circuit Court.

Kev Ua Haujlwm: Tiv thaiv cov cuab yeej los ntawm kev ua haujlwm tsis zoo thiab kev puas tsuaj nyob rau hauv qhov tsis tshua muaj hluav taws xob, thiab zam kev nyab xeeb kev nyab xeeb los ntawm cov khoom siv tam sim ntawd pib thaum lub zog rov qab los.

Kev Tiv Thaiv Leakage (Residual Current Protection Principple)

Core Component: Zero-sequence tam sim no transformer.

Kev Ua Haujlwm Logic: Raws li qhov xwm txheej ib txwm muaj, cov tam sim no nyob rau theem thiab cov kab nruab nrab yog sib npaug hauv qhov loj thiab qhov sib txawv ntawm kev coj. Sib nqus flux nyob rau hauv lub transformer core tshem tawm ib leeg tawm, ua rau tsis muaj induced tam sim no tso zis. Thaum cov dej xau tshwm sim (xws li hluav taws xob poob siab), qee qhov tam sim no poob hauv av, ua rau muaj qhov tsis sib xws hauv ob theem tam sim no. Lub transformer generates ib tug induced teeb liab, triggering lub mus txawv tebchaws unit.

Nta: Kev ua haujlwm qis (feem ntau 30mA), ua ntej kev nyab xeeb ntawm tus kheej.