1. OvertView ntawmMC Cable
MC Cable yog cov hlau phom phom nrog cov txheej txheej sab nraud feem ntau ua los ntawm txhuas los yog cov hlau, muab kev tiv thaiv zoo dua. Tus thawj coj sab hauv feem ntau yog tooj liab lossis txhuas, thiab cov rwb thaiv tsev txheej yog ua los ntawm thermosetting lossis thermoplastic ntaub ntawv xws li XLPE lossis PVC. Cov xwm txheej tseem ceeb ntawm MC cables muaj xws li cov chaw ua haujlwm, cov tsev lag luam lag luam, cov chaw lag luam hauv av, thiab lwm yam khoom siv, thiab lwm yam khoom siv, thiab lwm yam khoom siv, thiab lwm yam khoom siv, thiab lwm yam khoom siv, thiab lwm yam khoom siv, thiab lwm yam khoom siv
2. Rated tam sim no ntawm MC cable
Rated tam sim no yog hais txog qhov ntau tshaj plaws tam sim no tus nqi uas ib lub cable tuaj yeem ruaj khov raws li cov xwm txheej tshwj xeeb. Nws nyob ntawm cov ntsiab lus hauv qab no:
2.1 Cov Ntaub Ntawv Saib Xyuas
Cov neeg saib xyuas ntawm MC cov qooblab feem ntau yog ua los ntawm tooj liab lossis txhuas. Tooj liab tus neeg saib xyuas, vim lawv qhov kev ua haujlwm tooj ntau dua, feem ntau muaj cov ntsuas ntsuas dua tshiab tam sim no dua li txhuas tus cwj pwm ntawm tib lub chaw hla. Piv txwv li, qhov ntsuas Rated tam sim no ntawm 10 tus neeg xyuas pib tooj liab yog li 30% siab dua li ntawm tus neeg kos thawj ntawm tib qho kev tshwj xeeb.
2.2 Tus neeg saib xyuas hla cheeb tsam ntawm ntu
Qhov chaw hla ntawm tus neeg xyuas kev coj ua (AWG lossis hli ²) cuam tshuam ncaj qha rau kev nqa khoom tam sim no ntawm cable. Ib thaj chaw hla kev loj dua muab cov nqi tiv tsawg dua thiab siab dua cov peev txheej tam sim no. Piv txwv li, qhov ntsuas nyob tam sim no ntawm 4 tus neeg xyuas pib me yog feem ntau yog nruab nrab ntawm 85A thiab 95A, thaum lub 10a thiab 40as.
2.3 Rwb thaiv tsev cov ntaub ntawv
Cov cua sov tsis kam ntawm cov ntaub ntawv rwb thaiv tsev cuam tshuam rau cov ntaus nqi tam sim no. Piv txwv li, MC cables insulated nrog xlpe (hla cov polyethylene) feem ntau wrovulated cables dua li PVC insululated cables
2.4 Txoj Kev Txhim Kho
Cov txheej txheem teeb tsa ntawm MC Cable muaj qhov cuam tshuam tseem ceeb ntawm qhov ntaus nqi tam sim no. Cov kev teeb tsa kev teeb tsa muaj xws li:
Ncaj qha rau saum huab cua
Yeeb Nkab Tso
Ncaj qha faus lossis nteg rau ntawm cable tais
Thaum pw saum huab cua, tshav kub dissipation nyhuv ntawm lub cable zoo dua, yog li cov rated tam sim no yog siab dua; Thaum faus rau hauv av, cov av ib puag ncig yuav txwv kub dissipation, yog li txo qhov rated tam sim no ntawm lub cable.
2.5 ib puag ncig kub
Lub ambient kub cuam tshuam rau txoj kev nqa khoom tam sim no ntawm MC cables. Muaj peev xwm ntau dua qhov kub yuav txo tau cov cua sov muaj peev xwm ntawm cov cable, uas ua rau muaj kev txo qis hauv qhov ntsuas hluav taws xob tam sim no. Piv txwv li, XLPE insulated mc cables nrog rau ib tug neeg ntsuas kub ntawm 90 degree c tuaj yeem ntsuas ntawm 100a nyob rau hauv 30a nyob rau hauv 30a hauv 50 degree c ib puag ncig.
2.6 hom kab thauj khoom
Daim ntawv thov cov xwm txheej ntawm cov cable, xws li load tsis tu ncua, tsim cov khoom sib txawv, lossis luv-kawg cov khoom ntim, tseem cuam tshuam rau qhov ntsuas uas muaj nyob tam sim no. Rau cov thauj khoom txuas ntxiv, yuav tsum tau xaiv nruj me ntsis raws li cov ntaus nqi tam sim no, thaum muaj cov nqi sib zog, tuaj yeem nce ntxiv.
3. Txoj kev rau xam cov rated tam sim no ntawmMC Cable
Qhov ntsuas cov kev xam tam sim no MC Cables yog hais txog NEC (National Electrotecical Commission Commission) Cov Qauv, thiab cov txheej txheem kev suav tshwj xeeb muaj xws li:
1.Determine cov neeg saib xyuas cov khoom thiab cov ntoo khaub lig.
2.determine cov khoom rwb thaiv tsev thiab nws cov kev ntaus kub kub.
3.Xaiv txoj kev teeb tsa thiab qhov cuam tshuam ntawm ib puag ncig kub.
4.Thaum cov rated tam sim no siv txoj kev txhim kho qhov tseeb.
5.assess voltage poob raws li ntev ntev thiab ua kom muaj kev hloov kho kom tsim nyog.
4. MC cable xaiv nyob rau hauv cov ntawv thov sib txawv
4.1 Cov Vaj Tse Lag Luam
Hauv cov tsev lag luam, MC CABLE siv rau teeb pom kev zoo, cua txias, thiab fais fab faib cov tshuab. Tooj liab cov neeg saib xyuas feem ntau yog siv los txhim kho kev nyab xeeb thiab kev ntseeg tau ntev. Rau cov thauj khoom txuas tas li, xws li cov chaw pub mov rau cov neeg rau zaub mov, kev ntsuas txias dua yuav tsum tau txiav txim siab.
4.2 Cov Chaw Muaj Chaw
Muaj ib puag ncig feem ntau yuav tsum muaj hluav taws xob hluav taws xob muaj hluav taws xob, ntau dua hla ntawm thaj tsam MC cables yog xaiv. Cov txheej txheem kev teeb tsa feem ntau yog cable tais tso pw lossis kev teeb tsa kev teeb tsa kom txo tau kev pheej hmoo ntawm cable kev puas tsuaj.
4.3 Av lossis av ib puag ncig
Hauv av hauv av lossis av ib puag ncig yuav tsum muaj cov khoom siv dej thiab cov kev tiv thaiv corrosion thiab cov kev tiv thaiv corrosion-resistant sheaths yuav tsum tau siv los tiv thaiv cov cable los ntawm kev cuam tshuam los ntawm noo noo.
5. Cov kev ntsuas kev txheeb xyuas ntawm cov kev xaiv uas muaj rated tam sim no
Rooj plaub 1: Muab fais fab rau cov ntaub ntawv
Tus neeg rau zaub mov racks nyob rau hauv lub chaw haujlwm xav tau cov khoom siv hluav taws xob ruaj khov, feem ntau yog siv tooj liab core core thiab nteg hauv daim ntawv ntawm cable cable. Piv txwv tias yog ib qho kev siv cable ib zaug ntawm 100A, ntawm qhov kub ntawm 30 degree c, nws yog ib qho tsim nyog los xaiv ib qho kev ntsuas ntawm tsawg kawg 125A kom paub meej txog kev nyab xeeb npoo.
Rooj plaub 2: Muaj cov khoom siv Cable xaiv
Lub cev muaj zog ntawm qee lub Hoobkas yuav tsum tau khiav tsis tu ncua, nrog lub zog ntawm 50 KW, ib qho hluav taws xob ntawm 480V, thiab ib qho hluav taws xob ntawm txog 10 amps. Xav txog qhov kub tshaj plaws ntawm 40 degree c, nws yog ib qho yuav tsum tau xaiv MC cables nrog ib tug rated tam sim no tsis tsawg dua 100a.
Rooj plaub 3: Undergrounding system
Ib txoj kev pw hauv av nyob hauv av yuav tsum tau nqa lub nra ntawm 75a, nrog qhov kub ntawm 25 degree c, siv cov txhuas coj, thiab faus ncaj qha. Vim tias cov cua sov tsis zoo tso tawm, MC cables nrog ib tus neeg nyob tam sim no tsawg kawg 90A yuav tsum tau xaiv.
