Kev tshuaj xyuas ntawm Circuit Breakers
Lub Circuit Breaker yog ib lub cuab yeej tseem ceeb hauv lub zog fais fab uas siv los tiv thaiv thiab tswj cov circuits. Nws tuaj yeem kaw, nqa thiab txiav cov hluav taws xob hauv qab qhov xwm txheej ib txwm muaj lossis qhov xwm txheej tsis zoo. Nws cov haujlwm tseem ceeb suav nrog kev tiv thaiv overload, kev tiv thaiv luv luv, kev tiv thaiv undervoltage, thiab lwm yam. Nws zoo ib yam li kev sib xyaw ua ke ntawm fuses thiab over/under-voltage thermal relays, tab sis nws muaj kev ntseeg siab dua thiab rov siv dua.

Cov yam ntxwv tseem ceeb
Qhov hluav taws xob ntsuas (Ue): Qhov hluav taws xob siab tshaj plaws uas lub tshuab hluav taws xob ua haujlwm ib txwm muaj, xws li 220V, 380V, thiab lwm yam. 37

Tam sim no ntsuas (Hauv): Tus nqi tam sim no siab tshaj plaws uas tuaj yeem nqa tau zoo rau lub sijhawm ntev, uas yuav tsum ntau dua li tam sim no ua haujlwm ntawm lub voj voog los ntawm 35%.

Lub peev xwm tawg (Icu/Ics): Lub peev xwm tawg luv luv kawg (Icu) yog hais txog lub peev xwm los tawg qhov siab tshaj plaws ntawm tam sim no luv luv hauv ib zaug. Lub peev xwm tawg ua haujlwm (Ics) yog hais txog qhov txwv tam sim no uas tseem siv tau tom qab tawg. Feem ntau, cov cuab yeej tawg voj voog thav duab xav tau Ics≥50%Icu, thiab cov cuab yeej tawg voj voog molded xav tau Ics≥25% ICU.

Lub sijhawm luv luv uas tiv taus tam sim no (Icw): Lub peev xwm ntawm lub circuit breaker kom tiv taus tam sim no luv luv hauv lub sijhawm teev tseg yam tsis muaj kev puas tsuaj.

II. Kev faib tawm ntawm Circuit Breakers
1. Los ntawm qib voltage
Cov cuab yeej hluav taws xob siab: Siv rau hauv cov kab ke ntawm 3kV thiab siab dua. Cov tshuaj tua hluav taws xob feem ntau suav nrog sulfur hexafluoride (SF6), nqus tsev, roj, thiab lwm yam. 4

Cov cuab yeej hluav taws xob qis-voltage raug muab faib ua peb hom: hom thav duab (ACB), hom molded case (MCCB), thiab hom miniature (MCB). 57.

2. Los ntawm cov qauv thiab daim ntawv thov
Lub tshuab hluav taws xob hom thav duab (ACB)
Tam sim no ntsuas: 200A txog 6300A, nruab nrog plaub-theem kev tiv thaiv (kev ncua ntev, kev ncua luv, tam sim ntawd, thiab av txhaum), nws feem ntau yog siv rau kev tiv thaiv cov hloov pauv tseem ceeb hauv cov kab ke faib khoom lossis cov khoom siv loj.

Lub tshuab hluav taws xob Moulded case Circuit Breaker (MCCB)
Cov qauv me me, ntsuas tam sim no 10A txog 1600A, tsim nyog rau kev tiv thaiv ceg hluav taws xob. Lub MCCB hluav taws xob txhawb nqa kev tiv thaiv xaiv, thiab qee cov qauv muaj lub luag haujlwm sib txuas hauv cheeb tsam 57.

Lub Tshuab Hluav Taws Xob Me Me (MCB)
Nws yog siv rau hauv cov voj voog davhlau ya nyob twg hauv qab 125A (xws li cov khoom siv hauv tsev thiab cov lag luam), muaj nyob rau hauv 1P txog 4P cov lus qhia, thiab txhawb nqa kev tiv thaiv overload, luv luv Circuit Court thiab kev tiv thaiv to.

3. Nias lub tshuab tua hluav taws xob arc
Lub tshuab hluav taws xob nqus tsev: Tua hluav taws xob sai, lub neej ntev, tsim nyog rau cov xwm txheej ua haujlwm ntau zaus 4.

SF6 Circuit Breaker: Nws muaj kev rwb thaiv tsev zoo heev thiab kev ua haujlwm tua hluav taws xob thiab feem ntau yog siv rau hauv cov kab ke high-voltage. Qhov huv ntawm cov roj yuav tsum tau kuaj xyuas tas li.

Iii. Cov Ntsiab Cai rau Kev Xaiv Circuit Breaker
Sib phim cov kev sib txuas ntawm lub voj voog
Qhov ntsuas hluav taws xob ≥ qhov hluav taws xob ntawm kab, qhov ntsuas tam sim no ≥ qhov siab tshaj plaws tam sim no, lub peev xwm tawg ≥ qhov xav tau tam sim no luv luv 57.

Kev hloov kho hom thauj khoom
Kev tiv thaiv lub cev muaj zog yuav tsum xav txog qhov pib tam sim no (qhov teeb tsa tam sim ntawd yog 1.35 txog 1.7 npaug ntawm qhov pib tam sim no). Lub voj voog teeb pom kev zoo siv rau npaug ntawm qhov tam sim no ntawm 78.

Kev xaiv sib koom tes
Cov cuab yeej hluav taws xob sab saud thiab sab qis yuav tsum ua kom tau raws li qhov sib txawv ntawm lub sijhawm (xws li qhov sib txawv ntawm kev ncua sijhawm luv luv ≥0.1s) thiab qhov sib txawv tam sim no (qhov kev ua haujlwm tam sim no ntawm qib sab saud ≥ 1.2 npaug ntawm qib qis dua) kom tsis txhob muaj kev hla dhau theem tripping.

Kev hloov pauv ib puag ncig
Rau qhov chaw siab, av noo lossis kub, yuav tsum xaiv cov qauv tshwj xeeb thiab kho qhov tam sim no (yuav tsum txo qhov muaj peev xwm thaum qhov kub tshaj 40 ℃). 13.

Iv. Kev Ntsuas thiab Kev Txij Nkawm Circuit Breaker
Cov khoom tseem ceeb ntawm kev sim
Kev tiv thaiv kev sib cuag zoo li qub / dynamic: Nrhiav kev poob kev sib cuag 12.

Kev tshuaj xyuas cov yam ntxwv ntawm lub tshuab: Lub sijhawm qhib thiab kaw, qhov ceev thiab tib lub sijhawm 14.

Kev ua tau zoo ntawm kev rwb thaiv tsev: Kev ntsuas hluav taws xob, kev kuaj pom qib nqus tsev (rau cov tshuab hluav taws xob nqus tsev) 14.

Kev txheeb xyuas kev ua haujlwm tiv thaiv: Kev kho qhov siab ntawm qhov overload thiab luv luv tripping action nqi 8.

Cov ntsiab lus tseem ceeb ntawm kev saib xyuas
Kev tshuaj xyuas tsis tu ncua: Kev ntsuas roj (SF6 circuit breaker), kev sib cuag ablation, lubrication mechanism 48.

Kev ntsuam xyuas tiv thaiv: Ua raws li cov qauv xws li GB/T 1984 thiab GB 14048, ib zaug txhua 1 txog 3 xyoos.

Kev tswj qhov ua yuam kev: Yog tias roj tsis txaus, kub dhau lossis tawg, yuav tsum tau muaj kev cais tawm thaum muaj xwm txheej ceev thiab yuav tsum tshawb xyuas cov teeb meem nrog kev sib cuag lossis lub kaw lus tua hluav taws xob. 4.

V. Kev Tshawb Fawb Txog Cov Teeb Meem Uas Feem Ntau Muaj
Qhov sib txawv ntawm lub tshuab hluav taws xob thiab lub tshuab txiav tawm
Lub disconnector (QS) tsuas yog siv los cais lub hwj chim thiab tsis muaj peev xwm tua hluav taws xob. Lub circuit breaker (QF) tuaj yeem txiav qhov txhaum tam sim no ntawm 12.

Qhov tseem ceeb ntawm Icu thiab Ics
Icu qhia txog lub peev xwm tawg kawg, thiab Ics qhia txog kev ntseeg tau ntawm kev ua haujlwm tas mus li. Cov kab tseem ceeb tsom mus rau Ics, thaum cov kab ceg tsom mus rau Icu8.

Kev xaiv cov hluav taws xob txwv tam sim no
Sib phim qhov kev ntxhov siab thermal ntawm lub cable los ntawm qhov nkhaus txwv tam sim no, thiab muab qhov tseem ceeb rau cov qauv nrog qhov ceev tawg sai (xws li lub tshuab nqus tsev circuit breakers) 78.

Kev tiv thaiv kev xau dej tsis ua haujlwm
Feem ntau vim yog qhov txo qis ntawm cov kab rwb thaiv tsev lossis cov av tsis zoo, nws yog qhov tsim nyog los ntes cov dej xau thiab kho qhov kev nqis tes ua (feem ntau 30mA txog 300mA).