Iimfuno zokwakha iintambo
Ngaphambi kokubeka intambo, khangela ukuba intambo inomonakalo womatshini kunye nokuba i-reel yekhebula ilungile.Kwiintambo ze-3kV nangaphezulu, uvavanyo lombane lokumelana kufuneka lwenziwe.Kwiintambo ezingaphantsi kwe-1kV, i-1kV megohmmeteringasetyenziselwa ukulinganisa ukumelana nokugquma.Ixabiso lokumelana ne-insulation ngokuqhelekileyo alikho ngaphantsi kwe-10MΩ.
Ngaphambi kokuqala umsebenzi wokwemba umsele wentambo, imibhobho engaphantsi komhlaba, umgangatho womhlaba kunye nomhlaba wendawo yokwakha kufuneka iqondwe ngokucacileyo.Xa ukumba imingxuma kwiindawo ezinemibhobho engaphantsi komhlaba, amanyathelo kufuneka athathwe ukukhusela umonakalo kwimibhobho.Xa kugrunjwa imisele kufuphi neepali okanye izakhiwo, kufuneka kuthathwe amanyathelo okuthintela ukuwa.
Umlinganiselo werediyasi yentambo yokugoba kwidayamitha yangaphandle yentambo akufunekanga ibe ngaphantsi kwala maxabiso achaziweyo alandelayo:
Kwiintambo zamandla ezininzi ezingundoqo ezinamaphepha, i-lead sheath ngamaxesha angama-15 kunye ne-aluminium sheath ngamaxesha angama-25.
Kwiphepha elifakwe kwi-single-core power cables, i-lead sheath kunye ne-aluminium sheath zombini ngamaxesha angama-25.
Kwiintambo zokulawula ezifakwe ngephepha, i-lead sheath ngamaxesha angama-10 kunye ne-aluminium sheath ngamaxesha angama-15.
Irabha okanye iplastiki efakwe kwi-multi-core okanye i-single-core cables, intambo ye-armored ngamaxesha angama-10, kunye nekhebula elingaguqukiyo ngamaxesha angama-6.
Kwicandelo elithe ngqo lomgca wekhebula ongcwatywe ngokuthe ngqo, ukuba akukho sakhiwo sisisigxina, izibonda zokumakisha kufuneka zingcwatywe, kwaye izibonda zokumakisha kufuneka zingcwatywe kumalungu kunye neekona.
Xa intambo yamandla efakwe kwi-oyile eyi-10kV yakhiwe phantsi kwemeko yobushushu obungaphantsi kwe-0.℃, indlela yokufudumala kufuneka isetyenziswe ukunyusa ubushushu be-ambient okanye ukushisa ikhebula ngokudlula okwangoku.Xa ukufudumala ngokudlula okwangoku, ixabiso langoku akufanele lidlule ixabiso langoku elilinganisiweyo elivunyelwe yikhebula, kwaye ubushushu bomgangatho wentambo akufanele budlule i-35.℃.
Xa ubude bomgca wentambo abudluli ubude bokuvelisa umenzi, intambo yonke kufuneka isetyenziswe kwaye amajoyina kufuneka agwenywe kangangoko kunokwenzeka.Ukuba amajoyina ayimfuneko, kufuneka abekwe kumngxuma okanye umngxuma wentambo yomsele okanye i-cable tunnel, kwaye imakwe kakuhle.
Iintambo ezingcwatywe ngokuthe ngqo phantsi komhlaba kufuneka zikhuselwe ngezixhobo kunye ne-anti-corrosion layer.
Kwiintambo ezingcwatywe ngokuthe ngqo phantsi komhlaba, umphantsi womsele kufuneka ucandwe kwaye uhlanganiswe phambi kokungcwatywa.Indawo ejikeleze iintambo kufuneka igcwaliswe ngomhlaba otyebileyo oyi-100mm okanye ilahleko.Umaleko womhlaba kufuneka ugutyungelwe ngesitya sokuvala ikhonkrithi esisigxina, kwaye amajoyina aphakathi kufuneka akhuselwe ngejacket yekhonkrithi.Iintambo akufanele zingcwatywe kwimigangatho yomhlaba kunye nenkunkuma.
Ubunzulu beentambo ezingcwatyelwe ngokuthe ngqo ze-10kV nangaphantsi abukho ngaphantsi kwe-0.7m, kwaye bungabi ngaphantsi kwe-1m kumhlaba wasefama.
Iintambo ezibekwe kwiintambo zentambo kunye neetonela kufuneka ziphawulwe ngeempawu kwiindawo ezikhokelela ekuphumeni, ii-terminals, ii-intermediate joints kunye neendawo apho ulwalathiso lutshintsha, lubonisa ukucaciswa kwentambo, iimodeli, iisekethe kunye nokusetyenziswa kokugcinwa.Xa ikhebula lingena kumsele wangaphakathi okanye i-duct, i-anti-corrosion layer kufuneka ihlulwe (ngaphandle kokukhusela umbhobho) kunye nepeyinti echasene ne-rust kufuneka isetyenziswe.
Xa iintambo zifakwe kwiibhloko zemibhobho yekhonkrithi, kufuneka kumiswe imingxunya.Umgama phakathi kwemingxunya akufuneki ube mkhulu kune 50m.
Imingxunya kufuneka ifakwe kwiitonela zentambo apho kukho ukugoba, amasebe, imithombo yamanzi, kunye neendawo ezinomahluko omkhulu kubude bomhlaba.Umgama phakathi kwemingxuma kwiindawo ezithe tye kufuneka ungadluli kwi-150m.
Ukongeza kwiibhokisi zokukhusela zekhonkrithi eziqinisiweyo, iibhobho zekhonkrithi okanye iibhobho zeplastiki ezinzima zingasetyenziswa njengezihlanganisi zekhebula eliphakathi.
Xa ubude bentambo edlula kwi-tube yokukhusela ingaphantsi kwe-30m, ububanzi bangaphakathi becandelo elichanekileyo ityhubhu yokukhusela kufuneka ibe ngaphantsi kwamaxesha angama-1.5 ububanzi obungaphandle bekhebula, kungabi ngaphantsi kwamaxesha angama-2.0 xa kukho ukugoba enye, kwaye akukho ngaphantsi kwe-2.5 amaxesha xa kukho ukugoba ezimbini.Xa ubude bekhebula obudlula ityhubhu yokukhusela bungaphezu kwama-30m (ubuncinci kumacandelo achanekileyo), ububanzi bangaphakathi bombhobho okhuselayo kufuneka bungabi ngaphantsi kwama-2.5 ububanzi obungaphandle bekhebula.
Ukudityaniswa kweengcingo ezingundoqo zekhebula kufuneka kwenziwe ngokuqhagamshelwa komkhono ojikelezileyo.Iintsimbi zobhedu kufuneka zihlanjululwe okanye zifakwe kwimikhono yobhedu, kunye neentsimbi ze-aluminium kufuneka zihlanjululwe ngemikhono ye-aluminium.Iibhubhu zokudibanisa i-Copper-aluminium kufuneka zisetyenziswe ukudibanisa iintambo zobhedu kunye ne-aluminium.
Zonke iintambo ezingundoqo ze-aluminiyam zi-crimped, kwaye ifilimu ye-oxide kufuneka isuswe ngaphambi kokuba i-crimping.Isakhiwo esipheleleyo se-sleeve emva kwe-crimping akufanele ikhubazeke okanye igobe.
Zonke iintambo ezingcwatywe phantsi komhlaba kufuneka zihlolwe imisebenzi efihliweyo ngaphambi kokuzaliswa ngasemva, kwaye umzobo ogqityiweyo kufuneka uzotywe ukubonisa ulungelelwaniso oluthile, indawo kunye nendlela.
Ukuwelda kweentsimbi ezingezizo i-ferrous kunye nezitywina zetsimbi (ezaziwa ngokuba kukutywinwa ngelothe) kufuneka ziqine.
Ukubekwa kwekhebula langaphandle, xa udlula kwi-cable hand hole okanye umngxuma, ikhebula ngalinye kufuneka limakishwe ngophawu lweplastiki, kwaye injongo, indlela, ukucaciswa kwekhebula kunye nomhla wokubeka intambo kufuneka imakwe ngepeyinti.
Kwiiprojekthi zangaphandle ezifihliweyo zokubeka ikhebula, umzobo ogqityiweyo kufuneka unikezelwe kwiyunithi yokusebenza ukwenzela ukugcinwa nokulawula iinjongo xa iprojekthi igqityiwe kwaye ihanjiswe ukuze yamkelwe.
Ixesha lokuposa: Jun-24-2024
