Lub qhov hluav taws xob hluav taws xob hluav taws xob yog qhov hloov pauv uas yuav ua haujlwm thaum lub hluav taws xob tam sim no hauv Circuit Court tshaj li tus nqi tau teev tseg. Feem ntau siv cov hluav taws xob hluav taws xob hluav taws xob tau muab faib ua ob hom: hom hluav taws xob thiab hom tam sim no, thiab hom tam sim no tau muab faib ntxiv rau hauv hom electromagnetic thiab hom hluav taws xob. Voltage hom to Circuit Court breakers yog siv nyob rau hauv low-voltage power grids qhov twg qhov nruab nrab point ntawm transformer yog tsis grounded. Nws tus yam ntxwv yog hais tias thaum ib tug neeg yog electrocuted, ib tug kuj high voltage tshwm nyob rau hauv nruab nrab kab thiab hauv av, ua rau lub relay ua hauj lwm thiab lub hwj chim hloov mus rau qhov chaw. Tam sim no hom to Circuit Court breakers yog tsuas yog siv nyob rau hauv low-voltage tis systems uas qhov nruab nrab point ntawm lub transformer yog grounded. Nws tus yam ntxwv yog tias thaum ib tug neeg raug electrocuted, ib tug leakage tam sim no tau pom los ntawm xoom-sequence tam sim no transformer, ua rau lub relay ua hauj lwm thiab lub hwj chim hloov mus rau disconnect.
Cov hauv qab no yog ob qho txhaum uas tau ntsib thaum siv cov hluav taws xob hluav taws xob thiab lawv cov kev daws teeb meem:
Fault 1: Lub xaim hluav taws xob hluav taws xob tawm mus sai li sai tau thaum nws muab tso rau hauv kev ua haujlwm
(I) Cov kab hluav taws xob peb-theem, suav nrog cov kab nruab nrab, tsis txhob dhau los ntawm xoom-sequence tam sim no transformer nyob rau hauv tib txoj kev. Kho cov kab hluav taws xob.
(ii) Cov kab hluav taws xob nrog thiab tsis muaj hluav taws xob txuas hluav taws xob txuas nrog. Tsuas yog cais ob lub voj voog.
(iii) Muaj ib qho chaw nyob thiab hauv av hauv Circuit Court. Tsuas yog tshem tawm cov khoom ntawd.
(iv) Muaj rov qab grounding ntawm txoj kab nruab nrab ua haujlwm dhau los ntawm xoom-sequence tam sim no transformer. Cov av rov qab yuav tsum tau muab tshem tawm.
(v) Cov hluav taws xob hluav taws xob hluav taws xob nws tus kheej yog qhov tsis raug thiab yuav tsum tau hloov.
Fault 2: Kev ua haujlwm tsis zoo ntawm cov hluav taws xob hluav taws xob tawg
(i) Ua los ntawm overvoltage. Yog tias lub Circuit Court breaker tuaj yeem ua haujlwm tau thaum muaj kev khiav hauj lwm overvoltage tshwm sim hauv Circuit Court, ncua sij hawm lossis impulse voltage tsis ua hauj lwm to Circuit Court breaker tuaj yeem xaiv. Ib qho resistor-capacitor absorption Circuit Court kuj tseem tuaj yeem ntsia nruab nrab ntawm cov neeg sib cuag los tiv thaiv cov overvoltage. Ib qho overvoltage absorption ntaus ntawv kuj tuaj yeem muab ntxiv rau hauv Circuit Court.
(ii) Electromagnetic cuam tshuam. Yog tias muaj cov khoom siv sib nqus los yog cov khoom siv hluav taws xob muaj zog nyob ze, qhov chaw teeb tsa ntawm lub qhov hluav taws xob hluav taws xob yuav tsum raug kho kom nyob deb ntawm cov khoom siv hluav taws xob.
(iii) Kev cuam tshuam tam sim no. Yog hais tias ob lub transformers yog ua nyob rau hauv parallel, lawv ob leeg muaj lawv tus kheej grounding. Txij li thaum lub impedance ntawm ob lub transformers tsis tuaj yeem sib npaug, ib qho circulating tam sim no yuav raug tsim nyob rau hauv cov av xaim, ua rau lub Circuit Court breaker ua haujlwm. Koj tuaj yeem tshem tawm ib txoj hlua hauv av. Tsis tas li ntawd, tib lub transformer muab lub zog rau tib lub load los ntawm ob qho tib si circuits. Cov dej ntws hauv ob lub voj voog tsis tuaj yeem zoo ib yam, thiab cov khoom siv hluav taws xob kuj tuaj yeem tshwm sim. Yog li ntawd, ob lub voj voog yuav tsum tau ua haujlwm sib cais.
(IV) Lub rwb thaiv tsev tsis kam ntawm cov kab ua haujlwm nruab nrab raug txo qis. Thaum lub rwb thaiv tsev ntawm kev ua haujlwm nruab nrab yog txo qis, yog tias peb-theem load tsis sib npaug, qhov kev ua haujlwm loj heev yuav tshwm sim ntawm cov kab nruab nrab thiab ntws mus rau lwm cov ceg hauv av, kom cov dej ntws tawm tuaj yeem tshwm sim ntawm txhua qhov xau. Circuit Court breaker, ua rau lub Circuit Court breaker malfunction.
(V) Kev siv tsis raug. Yog hais tias cov kab nruab nrab yog rov ua dua, nws yuav ua rau cov hluav taws xob hluav taws xob tsis zoo.
(VI) Kev cuam tshuam ntawm overload lossis luv luv Circuit Court. Yog tias qhov hluav taws xob hluav taws xob hluav taws xob muaj kev tiv thaiv luv luv thiab kev tiv thaiv overcurrent tib lub sijhawm, nws yuav ua haujlwm tsis zoo thaum qhov teeb tsa tam sim no ntawm kev tiv thaiv overcurrent tso tawm tsis tsim nyog. Lub sijhawm no, koj tuaj yeem kho qhov teeb tsa tus nqi tam sim no.