XLPE Insulated Hlau

XLPE insulated hlau pib nrog polyethylene raws li nws cov khoom siv hauv paus, uas dhau los ua cov txheej txheem hloov tshuaj lom neeg uas muaj cov organic peroxides los tsim nws tus ntoo khaub lig- txuas cov qauv molecular. Tus ntoo khaub lig-txuas cov txheej txheem txuas rau polyethylene tau tsim nyob rau hauv Teb Chaws Asmeskas rov qab rau xyoo 1950s thiab tau pom kev ua kom zoo dua qub txij li thaum, tshwj xeeb tshaj yog kom tau raws li qhov xav tau ntawm ib txwm muaj - qib siab dua. Raws li qhov xav tau kom muaj peev xwm kis tau tus mob tau loj hlob, 500 kV XLPE cable systems tau mus txog tam sim no muaj kev lag luam.

Tswj cov kab hluav taws xob uas muaj XLPE rwb thaiv tsev, braided shielding, steel daim kab xev armoring, thiab nplaim taws -retardant, halogen-dawb PVC txheej sheath muaj nyob rau hauv voltage ratings ntawm 450/750V thiab 600/1000V.

Rau txoj kev tiv thaiv, tswj cov cables feem ntau yog siv tooj liab hlau braiding los yog tooj liab daim kab xev wrapping. Copper hlau braided cov ntxaij vab tshaus muab kev tsim kho ruaj khov-lawv kev tiv thaiv kev ua tau zoo tseem zoo ib yam tsis hais txog kev khoov cable lossis lwm yam xwm txheej, thaum tuav tag nrho cov kab yooj yim. Qhov braiding no tuaj yeem ua tiav qhov ntom ntawm ntau dua 80%. Hauv kev sib piv, tooj liab daim kab xev qhwv tuaj yeem muab txog 100% kev pab them nqi.

PVC-cov kab hluav taws xob ntsuas hluav taws xob yog tsim los rau cov tshuab nrog cov ntsuas hluav taws xob tsis tshaj 450/750V.

Rau kev ua haujlwm tas mus li, qhov siab tshaj plaws tus neeg xyuas pib yog 70℃rau PVC-insulated cables thiab 90℃rau XLPE-insulated ntau yam.

Kev teeb tsa yuav tsum tau nqa tawm ntawm qhov kub thiab txias tshaj 0 degree, thiab qhov tsawg kawg nkaus khoov lub vojvoog thaum lub sijhawm teeb tsa yuav tsum yog rau lub sijhawm ntawm lub cable tag nrho txoj kab uas hla.

Cov neeg siv khoom ua raws li IEC 60228 cov cai.

Cov khoom no yog tsim nyob rau hauv raws li IEC 60502-1, uas qhia txog high-molecular polymer insulated fais fab cables. Tus qauv npog qhov ntsuas hluav taws xob xws li 1 kV (Um=1.2 kV) txog 35 kV (Um=40.5 kV). Tshwj xeeb, Tshooj 1 ntawm cov qauv chaw nyob cables nyob ntawm 1 kV (Um=1.2 kV) thiab 3 kV (Um=3.6 kV).

1. Fais Field Distribution
Piv rau sector-zoo li tus conductors, round stranded conductors muab ib tug ntau txawm hluav taws xob teb tis, uas txhawb siab voltage ratings rau lub cable.

2. Flexibility thiab dabtsi yog khoov Performance
Ib tug stranded conductor, tsim los ntawm ntau tus neeg nyob ntawm tej, muab superior yooj thiab khoov muaj peev xwm. Thaum cov khoom siv ib leeg yog khoov, cov khoom nyob rau sab nraud ntawm lub nruab nrab axis undergoes nro, thaum sab hauv muaj kev compression. Hauv kev tsim kho, txawm li cas los xij, tus kheej cov xov hlau tuaj yeem xaub txheeb ze rau ib leeg, tso cai rau sab hauv thiab sab nrauv los them nyiaj rau qhov sib txawv. Qhov no tiv thaiv kev deformation mus tas li thaum khoov thiab txhim kho ob qho tib si yooj thiab kev ruaj ntseg ntawm cov tub ntxhais.

Rau XLPE insulated cables, bendability yog roughly proportional to the square root of the number of stranded wires-ntau strands ua rau khoov yooj yim dua. Txawm li cas los xij, tag nrho qhov yooj yim kuj yog txwv los ntawm cov txheej txheem tiv thaiv sab nraud. Yog li ntawd, cov qauv kev lag luam qhia cov naj npawb zoo ntawm cov strands rau txhua qhov nominal cross-section.

3. Lay Direction thiab Stranding Configuration
Txhawm rau tiv thaiv kev tsis sib haum xeeb, cov kev taw qhia nteg yog hloov ntawm cov txheej txheem (sab laug- tes thiab sab xis- tes), kom ntseeg tau tias txhua txheej tuav ib txoj hauj lwm ruaj khov thiab ruaj khov. Qhov kev npaj no kuj ua kom zoo ib yam elongation thoob plaws txhua txheej thaum lub cable yog khoov.

Tag nrho cov xov tooj ntawm tus kheej nyob rau hauv ib qho stranded core tuaj yeem qhia tau tias:
K=1 + 6 + 12 + … + 6n (qhov twg n=1, 2, 3, ...)

Qhov ntau thiab tsawg tus neeg xyuas pib tau teev los ntawm tus ntoo khaub lig- cheeb tsam hauv cheeb tsam hauv square millimeters, txawm hais tias tus qauv nominal cross-section qauv yuav txawv raws lub teb chaws.

Cov khoom tiav + ntim cov thawv ntoo