Nyob rau hauv cov nqe lus ntawm kev tso cai rau lub sij hawm ntev ua hauj lwm kub rau cable cores, roj hmab rwb thaiv tsev feem ntau yog nyob rau ntawm 65 ° C, polyvinyl chloride (PVC) rwb thaiv tsev ntawm 70 ° C, thiab cross-linked polyethylene (XLPE) rwb thaiv tsev ntawm 90 ° C. Rau luv luv Circuit Court (nrog rau lub sijhawm ntev tshaj plaws tsis pub tshaj 5 vib nas this), qhov siab tshaj plaws tso cai tus neeg xyuas pib yog 160 ° C rau PVC rwb thaiv tsev thiab 250 ° C rau XLPE rwb thaiv tsev.
I. Qhov txawv ntawm XLPE Cables thiab PVC Cables
1. Tsawg Voltage Cross-Linked (XLPE) cables, txij li thaum lawv nruab nrab-1990s qhia, tau pom kev loj hlob sai, tam sim no suav nrog ib nrab ntawm kev ua lag luam nrog rau Polyvinyl Chloride (PVC) cables. Piv rau PVC cables, XLPE cables muaj peev xwm nqa tau ntau dua tam sim no, muaj peev xwm ua tau ntau dua, thiab lub neej ntev dua (PVC cable thermal lifespan feem ntau yog 20 xyoo nyob rau hauv cov kev mob zoo, thaum XLPE cable lifespan feem ntau yog 40 xyoo). Thaum kub hnyiab, PVC tso tawm cov pa luam yeeb dub thiab cov pa phem, thaum XLPE combustion tsis tsim cov pa phem halogen. Lub superiority ntawm cross-linked cables yog nce kev lees paub los ntawm kev tsim thiab daim ntawv thov sectors.
2. Ordinary PVC cables (cov rwb thaiv tsev thiab sheath) kub hnyiab tau nrawm nrawm, ua rau hluav taws kub. Lawv poob lub peev xwm muab hluav taws xob tsis pub dhau 1 mus rau 2 feeb. PVC combustion tso tawm cov pa luam yeeb tuab, ua rau ua pa nyuaj thiab kev khiav tawm. Qhov tseem ceeb tshaj, PVC combustion tso tawm cov pa phem thiab corrosive gases xws li hydrogen chloride (HCl) thiab dioxins, uas yog lub ntsiab ua rau cov neeg tuag nyob rau hauv hluav taws (suav txog 80% ntawm cov hluav taws kev tuag). Cov pa roj no corrode rau cov khoom siv hluav taws xob, ua rau muaj kev cuam tshuam loj ntawm kev ua haujlwm rwb thaiv tsev thiab ua rau muaj kev phom sij thib ob uas nyuaj rau txo qis.
II. Nplaim-Retardant Cables
1. Cov kab hluav taws xob hluav taws xob yuav tsum muaj cov yam ntxwv ntawm cov nplaim hluav taws thiab tau muab faib ua peb cov nplaim hluav taws kub-tiv thaiv qib A, B, thiab C raws li IEC 60332-3-24 "Kev ntsuam xyuas ntawm cov hluav taws xob cables nyob rau hauv hluav taws kub". Class A muaj qhov ua tau zoo tshaj plaws ntawm nplaim taws.
Kev sib piv combustion tests ntawm nplaim-retardant thiab non-flame-retardant xov hlau tau ua los ntawm US Standards thiab Technology Research Institute. Cov txiaj ntsig hauv qab no qhia txog qhov tseem ceeb ntawm kev siv cov kab hluav taws xob hluav taws xob:
a. Cov kab hluav taws xob hluav taws xob muab ntau dua 15 npaug ntau dua lub sijhawm khiav tawm piv rau cov xov hlau tsis muaj nplaim taws.
b. Cov kab hluav taws xob hluav taws xob hlawv tsuas yog ib nrab ntawm cov khoom siv ntau npaum li cov xov hlau tsis muaj nplaim taws.
c. Cov kab hluav taws xob hluav taws xob pom cov hluav taws xob tso tawm tsuas yog ib feem peb ntawm cov xov hlau uas tsis muaj nplaim taws.
d. Cov pa roj emissions los ntawm combustion tsuas yog ib feem peb ntawm cov khoom uas tsis yog nplaim taws.
e. Cov pa luam yeeb tsim kev ua tau zoo qhia tsis muaj qhov sib txawv ntawm cov khoom siv hluav taws xob thiab cov khoom tsis muaj nplaim taws.
2. Halogen-Free Low-Smoke Cables
Halogen-dawb tsis muaj pa luam yeeb cables yuav tsum muaj halogen-dawb, tsis muaj pa luam yeeb, thiab nplaim taws-retardant zoo, nrog rau cov nram qab no specifications:
IEC 60754 (Kev xeem tsis muaj halogen) IEC 61034 (Kev ntsuas pa taws tsawg)
PH weighted conductivity Yam tsawg kawg nkaus lub teeb transmittance
PH≥4.3 r≤10us/mm T≥60%
3. Hluav taws kub-Resistant Cables
a. Hluav taws kub-resistant cable combustion xeem ntsuas (qhov kub thiab txias) raws li IEC 331-1970 tus qauv yog 750 ° C rau 3 teev. Raws li qhov tseeb IEC 60331 cov qauv tshiab los ntawm kev pov npav IEC tsis ntev los no, qhov kub ntawm qhov kub ntawm 750 ° C txog 800 ° C rau 3 teev.
b. Cov kab hluav taws-tiv thaiv hluav taws xob thiab cov kab hluav taws xob tuaj yeem muab faib ua cov nplaim hluav taws kub-resistant cables thiab cov hluav taws kub-resistant cables raws li qhov sib txawv ntawm cov khoom tsis yog xim hlau. Cov kab hluav taws xob hauv tsev feem ntau siv cov mica-coated conductors thiab extruded nplaim-retardant rwb thaiv tsev raws li lawv cov qauv tseem ceeb, nrog rau feem ntau yog Class B khoom. Cov uas ua tau raws li Class A cov qauv feem ntau ntiav tshwj xeeb hluavtaws mica tapes thiab ntxhia rwb thaiv tsev (tooj liab core, tes tsho tooj liab, magnesium oxide rwb thaiv tsev, los yog MI) hluav taws-resistant cables.
Mineral-insulated hluav taws-resistant cables yog non-combustible, tsis muaj pa luam yeeb, yog corrosion-resistant, non-toxic, impact-resistant, thiab tiv thaiv dej tsuag. Lawv yog lub npe hu ua fireproof cables, qhia qhov zoo tshaj plaws fireproofing kev ua tau zoo ntawm hluav taws-resistant cable ntau yam. Txawm li cas los xij, lawv cov txheej txheem tsim khoom yog qhov nyuaj, lawv cov nqi ntau dua, lawv qhov ntev ntawm cov khoom siv yog txwv, lawv lub vojvoog dabtsi yog khoov loj, lawv cov rwb thaiv tsev yog qhov yooj yim rau ya raws, thiab tam sim no, tsuas yog cov khoom siv ib leeg ntawm 25mm2 thiab siab dua tuaj yeem muab tau. Kev ruaj ntseg terminals thiab intermediate connectors yog tsim nyog, ua rau installation thiab kev tsim kho complex.
Post lub sij hawm: Sep-07-2023