Intshayelelo kulwazi olusisiseko lwe-conductor shielding layer kunye ne-metal shielding layer

Umaleko okhuselayo we-conductor (ekwabizwa ngokuba ngumaleko okhuselayo wangaphakathi, umaleko ongaphakathi wesemi-conductive)

I-conductor shielding layer yi-non-metallic layer extruded kwi-cable conductor, ene-equipotential kunye ne-conductor kwaye inomthamo we-resistiveivity ye-100 ~ 1000Ω•m.Equipotential kunye nomqhubi.

Ngokubanzi, iintambo zombane ophantsi we-3kV nangaphantsi azinawo umaleko okhuselayo we-conductor, kwaye iintambo eziphakathi kunye neziphezulu ze-6kV nangaphezulu kufuneka zibe ne-conductor shielding layer.

Imisebenzi ephambili ye-conductor shielding layer: ukuphelisa ukungalingani kwendawo yomqhubi;ukuphelisa umphumo we-tip of the surface conductor;ukuphelisa ama-pores phakathi kwe-conductor kunye ne-insulation;yenza i-conductor kunye ne-insulation ngokusondeleyo;ukuphucula ukuhanjiswa kwentsimi yombane malunga nomqhubi;kwi-cross-linked cable conductor shielding layer, nayo inomsebenzi wokuthintela ukukhula kwemithi yombane kunye nokukhusela ukushisa.

I-Insulation layer (ekwabizwa ngokuba yi-insulation layer)

I-insulation ephambili yekhebula inomsebenzi othile wokumelana nombane wenkqubo.Ngethuba lobomi benkonzo yentambo, kufuneka imelane ne-voltage elinganisiweyo kunye ne-overvoltage ngexesha lokusilela kwenkqubo ixesha elide, i-voltage ye-impulse yombane, ukuqinisekisa ukuba akukho sihlobo okanye isigaba-to-isigaba sokuqhekeka isiphaluka esifutshane senzeke phantsi kwemeko yokufudumeza okusebenzayo.Ngoko ke, eyona nto iphambili yokugquma ingundoqo kumgangatho wekhebula.

I-polyethylene edibeneyo yoMnqamlezo yinto efanelekileyo yokukhusela, ngoku isetyenziswa ngokubanzi.Umbala wayo ubluish-mhlophe kwaye uguquguqukayo.Iimpawu zayo zezi: ukuxhathisa okuphezulu kwe-insulation;iyakwazi ukumelana nobuninzi bamandla aphezulu kunye ne-pulse electric field breakdown;i-tangent yelahleko ye-dielectric ephantsi;iipropati ezizinzileyo zeekhemikhali;ukumelana nobushushu obulungileyo, ixesha elide elivumelekileyo lobushushu bokusebenza kwe-90 ° C;iimpawu ezintle zoomatshini, ukucutshungulwa lula kunye nonyango lwenkqubo.

Umaleko okhuselayo we-insulation (okwabizwa ngokuba ngumaleko okhuselayo wangaphandle, umaleko ongaphandle we-semi-conductive)

I-insulation shielding layer yi-non-metallic layer extruded on the main insulation of the cable.Impahla yayo nayo i-cross-linked material ene-semi-conductive properties kunye ne-volume resistivity ye-500 ~ 1000Ω•m.I-equipotential kunye nokhuseleko lomhlaba.

Ngokubanzi, iintambo zombane ophantsi we-3kV nangaphantsi azinawo umaleko okhuselayo, kwaye iintambo eziphakathi neziphezulu ze-6kV nangaphezulu kufuneka zibe ne-insulation shielding layer.

Indima ye-insulation shielding layer: utshintsho phakathi kwe-insulation main of the cable kunye ne-grounding metal shielding, ukwenzela ukuba babe noqhagamshelwano olusondeleyo, ukuphelisa i-gap phakathi kwe-insulation kunye ne-conductor yomhlaba;ukuphelisa umphumo we-tip ebusweni be-tape yobhedu yokumisa;phucula ukuhanjiswa kwebala lombane malunga nomphezulu wokugquma.

I-insulation shielding yahlulwe ibe ziindidi ezihluthwayo nezingenakuhluthwa ngokwenkqubo.Kwiintambo zombane ophakathi, uhlobo olunokuhluthwa lusetyenziselwa i-35kV nangaphantsi.Isikhuselo esihle se-insulation esinokususwa sincamathela kakuhle, kwaye akukho masuntswana e-semi-conductive aseleyo emva kokuhlutywa.Uhlobo olungahluthwanga lusetyenziselwa i-110kV nangaphezulu.Uluhlu lokukhusela olungenakuhluthwa ludibaniswe ngakumbi kunye ne-insulation main, kwaye iimfuno zenkqubo yokwakha ziphezulu.

Umaleko okhusela isinyithi

Umaleko okhuselayo wesinyithi usongelwe ngaphandle komgangatho okhuselayo.Umaleko okhuselayo wesinyithi ngokuqhelekileyo usebenzisa iteyiphu yobhedu okanye ucingo lobhedu.Sisakhiwo esibalulekileyo esinciphisa intsimi yombane ngaphakathi kwekhebula kwaye ikhusela ukhuseleko lomntu.Kwakhona i-grounding shielding layer ekhusela intambo ekuphazamisekeni kombane kwangaphandle.

Xa i-grounding okanye i-short-circuit iphutha lenzeke kwinkqubo, i-metal shielding layer iyishaneli ye-short-circuit grounding current.Indawo yayo enqamlezileyo kufuneka ibalwe kwaye imiselwe ngokwenkqubo yomthamo wesekethe emfutshane kunye nendlela yokumisa inqaku elingathathi hlangothi.Ngokubanzi, indawo enqamlezileyo yomaleko okhuselayo obalelwe inkqubo ye-10kV kucetyiswa ukuba ingabi ngaphantsi kwe-25 millimeters yesikweri.

Kwimigca yentambo ye-110kV nangaphezulu, i-metal shielding layer yenziwe nge-sheath yensimbi, eneendawo zombini zokukhusela intsimi yombane kunye nemisebenzi yokutywinwa kwamanzi, kwaye inemisebenzi yokukhusela ngomatshini.

Izinto eziphathekayo kunye nesakhiwo se-sheath yensimbi ngokuqhelekileyo yamkela i-sheath ye-aluminium edibeneyo;isingxobo sobhedu;isingxobo sentsimbi engatyiwayo;i-lead sheath, njl. Ukongeza, kukho i-sheath edibeneyo, eyisakhiwo apho i-aluminium foil ifakwe kwi-PVC kunye ne-PE sheaths, esetyenziswa ngokubanzi kwiimveliso zaseYurophu naseMelika.

Umaleko wesikrweqe

Umaleko wesikrweqe sesinyithi usongelwe kungqameko olungaphakathi lwelayini, ngokuqhelekileyo kusetyenziswa isikrweqe sebhanti sentsimbi enamaleko amabini.Umsebenzi wayo kukukhusela ngaphakathi kwekhebula kunye nokuthintela amandla angaphandle omatshini ekonakalisa ikhebula ngexesha lokwakha kunye nokusebenza.Kwakhona kunomsebenzi wokukhusela umhlaba.

Uluhlu lwezixhobo zineentlobo ezahlukeneyo, ezifana nentsimbi yentsimbi, izixhobo zensimbi ezingenasici, izixhobo ezingezizo zetsimbi, njl., ezisetyenziselwa izakhiwo zekhebula ezikhethekileyo.