Cov qauv ntawm cov cable zoo li yooj yim, qhov tseeb, txhua qhov ntawm nws muaj nws lub hom phiaj tseem ceeb, yog li txhua yam khoom siv yuav tsum tau ua tib zoo xaiv thaum tsim cov cable, txhawm rau ua kom ntseeg tau tias cov khoom siv ntawm cov khoom siv no thaum lub sijhawm ua haujlwm.
1. Cov khoom siv hluav taws xob
Keeb kwm, cov ntaub ntawv siv rau lub hwj chim cable conductors yog tooj liab thiab txhuas. Sodium kuj tau sim luv luv. Tooj thiab txhuas muaj cov khoom siv hluav taws xob zoo dua, thiab cov tooj liab kuj tsawg dua thaum xa cov tib yam tam sim no, yog li cov kab hluav taws xob sab nraud ntawm tus neeg xyuas pib yog me dua li ntawm txhuas tus neeg xyuas pib. Tus nqi ntawm aluminium yog qis dua tooj liab. Tsis tas li ntawd, vim tias qhov ntom ntawm tooj liab loj dua li ntawm txhuas, txawm tias lub peev xwm nqa tam sim no zoo ib yam, qhov hla ntawm txhuas tus neeg xyuas pib loj dua li tus neeg xyuas pib tooj liab, tab sis aluminium conductor cable tseem sib zog dua tooj liab conductor cable. .
2. Cov ntaub ntawv rwb thaiv tsev
Muaj ntau cov ntaub ntawv insulating uas MV fais fab cables tuaj yeem siv tau, txawm tias suav nrog cov txheej txheem thev naus laus zis impregnated ntawv rwb thaiv tsev cov ntaub ntawv, uas tau siv tau zoo rau ntau tshaj 100 xyoo. Niaj hnub no, extruded polymer rwb thaiv tsev tau txais dav. Extruded polymer rwb thaiv tsev cov ntaub ntawv suav nrog PE (LDPE thiab HDPE), XLPE, WTR-XLPE thiab EPR. Cov ntaub ntawv no yog cov thermoplastic thiab cov thermosetting. Cov ntaub ntawv thermoplastic deform thaum rhuab, thaum cov ntaub ntawv thermoset khaws lawv cov duab ntawm kev ua haujlwm kub.
2.1. Ntawv rwb thaiv tsev
Thaum pib ntawm lawv txoj haujlwm, cov ntaub ntawv insulated cables tsuas yog nqa ib qho me me thiab khaws cia zoo. Txawm li cas los xij, cov neeg siv hluav taws xob txuas ntxiv ua rau lub cable nqa ntau dua thiab siab dua, cov txheej txheem ntawm kev siv cov khoom qub tsis haum rau cov kev xav tau ntawm cov cable tam sim no, ces cov kev paub zoo qub tsis tuaj yeem sawv cev rau yav tom ntej kev ua haujlwm ntawm cable yuav tsum zoo. . Nyob rau hauv xyoo tas los no, daim ntawv insulated cables tsis tshua siv.
2.2.PVC
PVC tseem siv los ua cov khoom siv insulating rau cov hluav taws xob tsawg 1kV cables thiab tseem yog cov khoom siv sheathing. Txawm li cas los xij, daim ntawv thov ntawm PVC hauv cable rwb thaiv tsev yog hloov los ntawm XLPE sai, thiab daim ntawv thov nyob rau hauv sheath yog sai hloov los ntawm linear low density polyethylene (LLDPE), nruab nrab ntom polyethylene (MDPE) los yog high density polyethylene (HDPE), thiab tsis. -PVC cables muaj nqi qis dua lub neej.
2.3. Polyethylene (PE)
Tsawg ntom polyethylene (LDPE) tau tsim nyob rau xyoo 1930s thiab tam sim no siv los ua lub hauv paus cob rau crosslinked polyethylene (XLPE) thiab ntoo-resistant ntoo crosslinked polyethylene (WTR-XLPE) cov ntaub ntawv. Nyob rau hauv lub xeev thermoplastic, qhov siab tshaj plaws kev khiav hauj lwm kub ntawm polyethylene yog 75 ° C, uas yog qis dua qhov kub ntawm cov ntaub ntawv insulated cables (80 ~ 90 ° C). Qhov teeb meem no tau raug daws nrog qhov tshwm sim ntawm cross-linked polyethylene (XLPE), uas tuaj yeem ua tau raws lossis siab tshaj qhov kev pab cuam kub ntawm cov ntawv-cov kab hluav taws xob.
2.4.Hla-txuas polyethylene (XLPE)
XLPE yog cov khoom siv thermosetting ua los ntawm kev sib xyaw cov polyethylene tsawg (LDPE) nrog tus neeg sawv cev sib txuas (xws li peroxide).
Qhov siab tshaj plaws kev khiav hauj lwm kub ntawm XLPE insulated cable yog 90 ° C, overload test yog mus txog 140 ° C, thiab luv luv-circuit kub yuav ncav cuag 250 ° C. XLPE muaj zoo heev dielectric yam ntxwv thiab yuav siv tau nyob rau hauv lub voltage range. 600V txog 500kV.
2.5. Water resistant ntoo Hla-txuas polyethylene (WTR-XLPE)
Qhov tshwm sim ntawm tsob ntoo dej yuav txo qhov kev pab cuam lub neej ntawm XLPE cable. Muaj ntau txoj hauv kev los txo cov ntoo ntoo loj hlob, tab sis ib qho ntawm feem ntau lees txais yog siv cov khoom siv hluav taws xob tshwj xeeb uas tsim los tiv thaiv cov ntoo loj hlob, hu ua water-resistant tree cross-linked polyethylene WTR-XLPE.
2.6. Ethylene propylene roj hmab (EPR)
EPR yog cov khoom siv thermosetting ua los ntawm ethylene, propylene (qee zaum peb lub monomer), thiab cov copolymer ntawm peb lub monomers hu ua ethylene propylene diene roj hmab (EPDM). Tshaj qhov kub ntau yam, EPR ib txwm nyob twj ywm mos thiab muaj kev tiv thaiv corona zoo. Txawm li cas los xij, qhov dielectric poob ntawm EPR cov khoom yog siab dua li ntawm XLPE thiab WTR-XLPE.
3. Rwb thaiv tsev vulcanization txheej txheem
Cov txheej txheem crosslinking yog tshwj xeeb rau cov polymer siv. Lub chaw tsim khoom ntawm crosslinked polymers pib nrog matrix polymer thiab tom qab ntawd stabilizers thiab crosslinkers tau ntxiv los ua ib qho sib xyaw. Cov txheej txheem crosslinking ntxiv cov ntsiab lus txuas ntxiv rau cov qauv molecular. Thaum hla kev sib txuas, cov saw hlau polymer molecular tseem elastic, tab sis tsis tuaj yeem raug txiav tag rau hauv cov kua dej.
4. Cov khoom siv hluav taws xob tiv thaiv thiab insulating shielding cov ntaub ntawv
Lub semi-conductive shielding txheej yog extruded rau sab nrauv ntawm tus neeg xyuas pib thiab rwb thaiv tsev kom zoo ib yam ntawm cov hluav taws xob hluav taws xob thiab kom muaj cov hluav taws xob hauv cov tub ntxhais cable insulated. Cov khoom siv no muaj cov qib engineering ntawm cov khoom siv roj carbon dub los ua kom cov txheej txheem tiv thaiv ntawm cov kab hluav taws xob kom ua tiav qhov kev ua haujlwm ruaj khov hauv qhov xav tau.
Post lub sij hawm: Apr-12-2024