Kev txheeb xyuas ntawm Circuit Breakers
Lub Circuit Court Breaker yog cov cuab yeej tseem ceeb hauv lub zog hluav taws xob siv los tiv thaiv thiab tswj cov kab hluav taws xob. Nws tuaj yeem kaw, nqa thiab tawg tam sim no nyob rau hauv ib txwm muaj lossis tsis raug. Nws cov haujlwm tseem ceeb suav nrog kev tiv thaiv overload, tiv thaiv luv luv, tiv thaiv kev tiv thaiv hluav taws xob, thiab lwm yam. Nws yog sib npaug ntawm kev sib txuas ntawm fuses thiab tshaj / qis-voltage thermal relays, tab sis nws muaj kev ntseeg siab dua thiab rov siv dua.

Main yam ntxwv parameter
Rated voltage (Ue): Qhov siab tshaj plaws voltage uas lub Circuit Court breaker ua haujlwm ib txwm, xws li 220V, 380V, thiab lwm yam. 37

Rated tam sim no (Nyob rau hauv): Qhov siab tshaj plaws tam sim no tus nqi uas tuaj yeem muaj kev nyab xeeb nyob rau lub sijhawm ntev, uas yuav tsum muaj ntau dua qhov kev khiav hauj lwm tam sim no ntawm Circuit Court los ntawm 35%.

Lub peev xwm tawg (Icu / Ics): Qhov kawg luv luv-circuit breaking peev (Icu) yog hais txog lub peev xwm los rhuav tshem qhov siab tshaj plaws luv luv tam sim no ntawm ib zaug. Lub peev xwm ua haujlwm tawg (Ics) yog hais txog qhov pib tam sim no uas tseem tuaj yeem siv tom qab tawg. Feem ntau, thav duab Circuit Court breakers xav tau Ics≥50% Icu, thiab molded case circuit breakers xav tau Ics≥25% ICU.

Lub sijhawm luv luv tiv thaiv tam sim no (Icw): Lub peev xwm ntawm lub tshuab hluav taws xob tiv thaiv hluav taws xob luv luv hauv lub sijhawm teev tseg yam tsis muaj kev puas tsuaj.

Ii. Classification ntawm Circuit Breakers
1. Los ntawm theem voltage
High-voltage Circuit Court breakers: Siv nyob rau hauv lub tshuab ntawm 3kV thiab siab dua. Feem ntau arc-extinguishing media muaj xws li sulfur hexafluoride (SF6), lub tshuab nqus tsev, roj, thiab lwm yam.

Tsawg-voltage Circuit Court breakers tau muab faib ua peb hom: thav duab hom (ACB), molded case type (MCCB), thiab hom me me (MCB). 57.

2. Los ntawm cov qauv thiab daim ntawv thov
Ncej hom Circuit Court breaker (ACB
Rated tam sim no: 200A txog 6300A, nruab nrog plaub-theem tiv thaiv (ntev ncua ntev, ncua sij hawm luv luv, instantaneous, thiab av txhaum), feem ntau yog siv rau kev tiv thaiv ntawm lub ntsiab keyboards nyob rau hauv tis systems los yog loj-muaj peev xwm.

Moulded case Circuit Breaker (MCCB
Compact qauv, ntsuas tam sim no 10A txog 1600A, haum rau cov ceg tiv thaiv kab mob. Lub tshuab hluav taws xob MCCB txhawb kev xaiv kev tiv thaiv, thiab qee cov qauv muaj kev cuam tshuam hauv cheeb tsam 57.

Miniature Circuit Breaker (MCB
Nws yog siv nyob rau hauv lub davhlau ya nyob twg Circuit Court hauv qab 125A (xws li tsev neeg thiab kev lag luam), muaj nyob rau hauv 1P txog 4P specifications, thiab txhawb overload, luv Circuit Court thiab tiv thaiv to.

3. Nias lub arc extinguishing tshuab
Nqus Circuit Court breaker: ceev arc extinguishing, ntev kev pab cuam lub neej, haum rau nquag ua hauj lwm scenarios 4.

SF6 Circuit Court breaker: Nws muaj cov rwb thaiv tsev zoo heev thiab kev ua haujlwm arc-extinguishing thiab feem ntau yog siv rau hauv cov tshuab hluav taws xob. Lub purity ntawm cov roj yuav tsum tau kuaj tsis tu ncua.

Iii. Cov ntsiab cai rau kev xaiv Circuit Breaker
Match Circuit Parameters
Rated voltage ≥ kab voltage, ntsuas tam sim no ≥ siab tshaj plaws load tam sim no, tawg muaj peev xwm ≥ xav tau luv-circuit tam sim no 57.

Load hom adaptation
Kev tiv thaiv lub cev muaj zog yuav tsum coj mus rau hauv tus account qhov pib tam sim no (tus nqi tam sim no mus txawv tebchaws yog 1.35 txog 1.7 npaug ntawm qhov pib tam sim no). Lub teeb pom kev zoo yuav siv sij hawm rau 6 npaug ntawm qhov tam sim no ntawm 78.

Xaiv kev sib koom tes
Lub tshuab hluav taws xob sab sauv thiab sab qis yuav tsum tau ua kom tau raws li lub sijhawm sib txawv (xws li ncua sijhawm ncua sijhawm sib txawv ≥0.1s) thiab qhov sib txawv tam sim no (qhov kev txiav txim siab tam sim no ntawm qib siab ≥ 1.2 npaug ntawm qib qis) kom tsis txhob dhau theem tripping.

Environmental adaptability
Rau qhov chaw siab tshaj, av ntub lossis kub kub, cov qauv tshwj xeeb yuav tsum raug xaiv thiab cov ntsuas tam sim no hloov kho (qhov yuav tsum tau txo qis thaum qhov kub siab tshaj 40 ℃). 13.

Iv. Circuit Breaker Test thiab Kho
Cov khoom tseem ceeb xeem
Static / dynamic contact resistance: Tshawb xyuas kev sib cuag 12.

Mechanical yam ntxwv tsom xam: qhib thiab kaw lub sij hawm, ceev thiab simultaneity 14.

Rwb thaiv tsev kev ua tau zoo: Kev ntsuas qhov ntsuas hluav taws xob, ntsuas ntsuas ntsuas ntsuas (rau lub tshuab nqus tsev vacuum) 14.

Kev tiv thaiv muaj nuj nqi pov thawj: Calibration ntawm overload thiab luv-circuit tripping nqis nqis 8.

Cov ntsiab lus tseem ceeb ntawm kev saib xyuas
Kev tshuaj xyuas tsis tu ncua: Roj siab (SF6 Circuit Court breaker), hu rau ablation, lub tshuab lubrication 48.

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

Kev tuav tsis raug: Nyob rau hauv cov ntaub ntawv ntawm cov roj tsis txaus, overheating los yog tawg, yuav tsum tau cais thaum muaj xwm ceev thiab muaj teeb meem nrog kev sib cuag los yog arc extinguishing system yuav tsum tau soj ntsuam. 4.

V. Kev tshuaj xyuas ntawm cov teeb meem
Qhov sib txawv ntawm Circuit Court breaker thiab disconnector
Lub disconnector (QS) tsuas yog siv los cais cov khoom siv hluav taws xob thiab tsis muaj peev xwm tua hluav taws. Lub Circuit Court breaker (QF) tuaj yeem txiav tawm qhov txhaum tam sim no ntawm 12.

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

Kev xaiv ntawm tam sim no-txheej Circuit Court breakers
Sib piv cov thermal stress ntawm lub cable los ntawm qhov tam sim no-limiting nkhaus, thiab muab qhov tseem ceeb rau cov qauv nrog ceev ceev ceev (xws li lub tshuab nqus tsev Circuit Court breakers) 78.

Qhov kev tiv thaiv leakage malfunctioned
Feem ntau vim qhov poob ntawm cov kab hluav taws xob los yog cov av tsis zoo, nws yog ib qho tsim nyog los kuaj xyuas qhov xau tam sim no thiab kho qhov pib ua haujlwm (feem ntau 30mA txog 300mA)