Lub sijhawm tshiab ntawm lub zog tshiab tsheb kev lag luam lub xub pwg ob lub hom phiaj ntawm kev hloov pauv kev lag luam thiab kev txhim kho thiab kev tiv thaiv ib puag ncig huab cua, uas ua rau muaj kev loj hlob ntawm high-voltage cables thiab lwm yam khoom siv rau cov tsheb fais fab, thiab cov tuam txhab cable thiab cov ntawv pov thawj muaj. tau nqis peev ntau lub zog rau hauv kev tshawb fawb thiab kev loj hlob ntawm high-voltage cables rau hluav taws xob tsheb. Cov hluav taws xob hluav taws xob hluav taws xob rau cov tsheb hluav taws xob muaj kev ua haujlwm siab hauv txhua yam, thiab yuav tsum ua tau raws li RoHSb tus qauv, nplaim hluav taws kub qib UL94V-0 tus qauv yuav tsum tau ua thiab ua haujlwm muag muag. Daim ntawv no qhia txog cov ntaub ntawv thiab kev npaj tshuab ntawm high voltage cables rau hluav taws xob tsheb.
1.Cov khoom siv ntawm high voltage cable
(1) Cov khoom siv hluav taws xob ntawm lub cable
Tam sim no, muaj ob yam ntaub ntawv tseem ceeb ntawm cable conductor txheej: tooj liab thiab txhuas. Ob peb lub tuam txhab xav tias aluminium core tuaj yeem txo lawv cov nqi ntau lawm, los ntawm kev ntxiv tooj liab, hlau, magnesium, silicon thiab lwm yam khoom siv los ntawm cov ntaub ntawv ntshiab txhuas, los ntawm cov txheej txheem tshwj xeeb xws li kev sib txuas thiab kev kho mob annealing, txhim kho cov hluav taws xob conductivity, khoov. kev ua tau zoo thiab corrosion kuj ntawm lub cable, thiaj li yuav ua tau raws li qhov yuav tsum tau ntawm tib lub peev xwm load, kom ua tiav cov nyhuv tib yam li tooj liab core conductors los yog zoo dua. Yog li, tus nqi tsim khoom tau txais txiaj ntsig zoo heev. Txawm li cas los xij, feem ntau cov tuam txhab tseem suav tias yog tooj liab yog cov khoom tseem ceeb ntawm cov neeg xyuas pib txheej, ua ntej ntawm tag nrho cov, qhov resistivity ntawm tooj liab yog tsawg, thiab ces feem ntau ntawm cov kev ua tau zoo ntawm tooj liab yog zoo dua li ntawm txhuas nyob rau tib theem, xws li cov tam sim no loj. nqa lub peev xwm, tsis tshua muaj hluav taws xob poob, kev siv hluav taws xob tsawg thiab muaj kev ntseeg siab. Tam sim no, kev xaiv cov conductors feem ntau siv lub teb chaws tus qauv 6 mos conductors (ib qho tooj liab hlau elongation yuav tsum siab tshaj 25%, txoj kab uas hla ntawm lub monofilament yog tsawg dua 0.30) los xyuas kom meej lub softness thiab toughness ntawm tooj liab monofilament. Table 1 teev cov qauv uas yuav tsum tau ua raws li cov khoom siv tooj liab uas siv tau.
(2) Insulating txheej ntaub ntawv ntawm cables
Nyob rau hauv ib puag ncig ntawm lub tsheb hluav taws xob yog complex, nyob rau hauv kev xaiv ntawm insulating cov ntaub ntawv, ntawm ib sab, los xyuas kom meej kev ruaj ntseg ntawm rwb thaiv tsev txheej, ntawm qhov tod tes, kom deb li deb raws li tau xaiv yooj yim ua thiab dav siv cov ntaub ntawv. Tam sim no, cov khoom siv insulating feem ntau yog polyvinyl chloride (PVC),cross-linked polyethylene (XLPE), silicone roj hmab, thermoplastic elastomer (TPE), thiab lwm yam, thiab lawv cov khoom tseem ceeb tau qhia hauv Table 2.
Ntawm lawv, PVC muaj cov hmoov txhuas, tab sis RoHS Cov Lus Qhia txwv tsis pub siv cov hlau lead, mercury, cadmium, hexvalent chromium, polybrominated diphenyl ethers (PBDE) thiab polybrominated biphenyls (PBB) thiab lwm yam khoom tsis zoo, yog li xyoo tas los no PVC tau hloov los ntawm XLPE, silicone roj hmab, TPE thiab lwm yam khoom zoo nkauj.
(3) Cable shielding txheej khoom
Txheej shielding yog muab faib ua ob ntu: semi-conductive shielding txheej thiab braided shielding txheej. Lub ntim resistivity ntawm cov khoom siv tiv thaiv ib nrab ntawm 20 ° C thiab 90 ° C thiab tom qab kev laus yog qhov tseem ceeb tshaj plaws los ntsuas cov khoom siv tiv thaiv, uas tsis ncaj qha txiav txim siab lub neej kev pab cuam ntawm high-voltage cable. Cov khoom siv tiv thaiv semi-conductive muaj xws li ethylene-propylene roj hmab (EPR), polyvinyl chloride (PVC), thiabpolyethylene (PE)raws li cov ntaub ntawv. Nyob rau hauv rooj plaub uas cov khoom siv raw tsis muaj qhov zoo dua thiab cov qib zoo tsis tuaj yeem txhim kho nyob rau lub sijhawm luv, cov chaw tshawb fawb tshawb fawb thiab cov khoom siv cable tsom mus rau kev tshawb fawb ntawm cov txheej txheem thev naus laus zis thiab cov qauv sib piv ntawm cov ntaub thaiv npog, thiab nrhiav kev tsim kho tshiab hauv kev lag luam. muaj pes tsawg leeg ntawm cov ntaub thaiv npog los txhim kho tag nrho cov kev ua tau zoo ntawm cable.
2.High voltage cable npaj txheej txheem
(1) Conductor strand technology
Cov txheej txheem yooj yim ntawm cable tau tsim los rau lub sijhawm ntev, yog li tseem muaj lawv tus kheej cov qauv tshwj xeeb hauv kev lag luam thiab kev lag luam. Nyob rau hauv tus txheej txheem ntawm kev kos duab, raws li hom untwisting ntawm ib lub xaim, cov khoom siv stranding tuaj yeem muab faib ua untwisting stranding tshuab, untwisting stranding tshuab thiab untwisting / untwisting stranding tshuab. Vim lub siab crystallization kub ntawm tooj liab conductor, lub annealing kub thiab lub sij hawm ntev, nws yog tsim nyog los siv cov untwisting stranding tshuab cov cuab yeej nqa tawm nruam rub thiab nruam rub monwire los txhim kho lub elongation thiab puas tus nqi ntawm hlau kos duab. Tam sim no, tus ntoo khaub lig-txuas polyethylene cable (XLPE) tau hloov tag nrho cov roj ntawv cable ntawm 1 thiab 500kV voltage theem. Muaj ob hom kev ua tus neeg xyuas pib ua cov txheej txheem rau XLPE conductors: ncig compaction thiab xaim twisting. Ntawm qhov tod tes, cov tub ntxhais hlau tuaj yeem zam qhov kub thiab txias hauv qhov sib txuas ntawm cov kav dej los nias nws cov ntaub thaiv npog thiab cov khoom siv rwb thaiv tsev rau hauv qhov sib txawv ntawm cov xaim thiab ua rau cov khoom pov tseg; Ntawm qhov tod tes, nws tseem tuaj yeem tiv thaiv kev nkag mus rau hauv dej raws li tus neeg xyuas pib coj los xyuas kom muaj kev nyab xeeb ntawm kev ua haujlwm ntawm cable. Tus neeg xyuas pib tooj liab nws tus kheej yog ib qho kev sib txuas ntawm cov qauv, uas feem ntau yog tsim los ntawm cov qauv zoo tib yam stranding tshuab, diav rawg stranding tshuab, thiab lwm yam.
(2) XLPE cable rwb thaiv tsev txheej txheem ntau lawm
Rau kev tsim cov hluav taws xob hluav taws xob XLPE cable, catenary qhuav cross-linking (CCV) thiab ntsug qhuav cross-linking (VCV) yog ob txoj hauv kev.
(3) Extrusion txheej txheem
Yav dhau los, cable manufacturers siv ib tug thib ob extrusion txheej txheem los tsim cable rwb thaiv tsev tub ntxhais, thawj kauj ruam nyob rau tib lub sij hawm extrusion conductor shield thiab rwb thaiv tsev txheej, thiab ces hla-txuas thiab mob rau lub cable tais, muab tso rau ib lub sij hawm ntawm lub sij hawm thiab ces extrusion. rwb thaiv tsev ntaub thaiv npog. Thaum lub sijhawm xyoo 1970, 1 + 2 peb txheej txheej extrusion tau tshwm sim hauv cov tub ntxhais insulated, tso cai rau kev thaiv sab hauv thiab sab nraud thiab rwb thaiv tsev kom tiav hauv ib txheej txheem. Cov txheej txheem ua ntej extrudes tus neeg xyuas pib ntaub thaiv npog, tom qab ib tug luv luv nrug (2 ~ 5m), thiab ces extrudes lub rwb thaiv tsev thiab rwb thaiv tsev ntaub thaiv npog ntawm tus neeg xyuas pib ntaub thaiv npog tib lub sij hawm. Txawm li cas los xij, thawj ob txoj hauv kev muaj qhov tsis zoo, yog li nyob rau xyoo 1990s, cov khoom siv hluav taws xob tsim khoom siv tau qhia txog peb txheej txheej txheej txheej txheej txheej txheej txheej txheej extrusion, uas extruded conductor shielding, rwb thaiv tsev thiab rwb thaiv tsev tiv thaiv tib lub sijhawm. Ob peb xyoos dhau los, cov teb chaws txawv teb chaws kuj tau tsim ib lub taub hau extruder tshiab thiab nkhaus mesh phaj tsim, los ntawm kev ntsuas cov ntsia hlau taub hau kab noj hniav txaus siab kom txo tau cov khoom tsub zuj zuj, txuas ntxiv lub sij hawm ntau lawm, hloov cov kev hloov tsis nres ntawm specifications. lub taub hau tsim kuj tuaj yeem txuag cov nqi poob qis thiab txhim kho kev ua haujlwm zoo.
3. Cov lus xaus
Cov tsheb tshiab lub zog muaj kev txhim kho zoo thiab muaj kev lag luam loj, xav tau cov khoom siv hluav taws xob siab hluav taws xob uas muaj peev xwm thauj khoom, siab kub tsis kam, electromagnetic shielding nyhuv, khoov tsis kam, yooj, ua haujlwm ntev thiab lwm yam kev ua tau zoo hauv kev tsim khoom thiab tuav lub kev ua lag luam. Hluav taws xob tsheb high-voltage cable cov ntaub ntawv thiab nws cov txheej txheem kev npaj muaj broad zeem muag rau txoj kev loj hlob. Lub tsheb hluav taws xob tsis tuaj yeem txhim kho kev tsim khoom thiab xyuas kom muaj kev nyab xeeb tsis muaj hluav taws xob hluav taws xob.
Post lub sij hawm: Aug-23-2024