Iimfuno ngokubanzi zemigca ephezulu:

Imigca ephezulukufuneka basebenzise ngokubanzi intsimbi ene-aluminiyam yocingo oluphothiweyo okanye ucingo oluphothiweyo lwe-aluminiyam.I-cross-section of the aluminiumstranded wire of the high-voltage overhead line ayiyi kuba ngaphantsi kwe-50 millimeters square, i-cross-section of core aluminium stranded wire ayiyi kuba ngaphantsi kwe-35 millimeters square;i-cross-section yocingo olungenanto aluyi kuba ngaphantsi kwe-16 millimeters square.

Icandelo lomnqamlezo wocingo kufuneka lihlangabezane neemfuno zomthwalo omkhulu.
Ukukhethwa kwecandelo lomnqamlezo kufuneka kwakhona kuhlangabezane nokulahlekelwa kwamandla ombane ongekho ngaphezu kwe-5% ye-voltage elinganisiweyo (i-high-voltage overhead lines), okanye i-2% ukuya kwi-3 (imigca yokukhanyisa eneemfuno ezibonakalayo eziphezulu).Kwaye kufuneka ukuhlangabezana amandla athile oomatshini.

Ukwakhiwa kwemigca ephezulu
Indlela yokuchaza ulwakhiwo kunye namanyathelo omgca we-ovaphezulu zezi zilandelayo:

Umlinganiselo womgca: uphonononge umhlaba kunye neempawu ngokomzobo woyilo, misela indawo yokuqalisa umgca, indawo yekona kunye nendawo yepali yevenkile yokugcina, ekugqibeleni unqume indawo yepali ephakathi kunye nepali yokuqinisa kwaye ufake isibonda.

Ukubuyisela umva kwe-excavator yesiseko: Xa ugrumba umgodi wesiseko, ingqwalasela kufuneka ihlawulwe kumgangatho womhlaba kunye nokusingqongileyo.Ubungakanani bokuvuleka komngxuma ngokuqhelekileyo buyi-0.8 yeemitha ububanzi kunye ne-0.3 yeemitha ubude.Ubungakanani bomngxuma wocingo ngokuqhelekileyo buzimitha ezi-0.6 ububanzi kunye ne-1.3 yeemitha ubude.Ixabiso lesalathiso sobunzulu obungcwatyiweyo bepali buhamba ngolu hlobo lulandelayo:

Ubude bepali yesamente (m) 7 8 9 10 11 12 15
Ukungcwatywa ubunzulu (m) 1.1 1.6 1.7 1.8 1.9 2.0 2.5
Xa ukubuyisela isiseko senqaba kunye nesiseko sentambo, akuvumelekanga ukubuyisela iingcambu zomthi, ukhula, njl njl. Umhlaba kufuneka udityaniswe ngaphezu kwezihlandlo ezibini, kwaye i-backfill kufuneka ibe yi-30-50 cm ngaphezu komhlaba.

Ipali: Iipali zombane zisetyenziselwa ukuxhasa iingcingo kwimigca engaphezulu.Kukho iintlobo ezininzi zeepali zombane, kwaye eziqhelekileyo ziyizibonda ezinqamlekileyo, izibonda zembombo, izibonda ze-terminal, njl njl ngokwemisebenzi yazo.Iindlela eziqhele ukusetyenziswa zezi: iipali zecrane, iipali ezintathu, iipali ezijonge phantsi kunye neepali zokumisa.

Ipali yetripod yindlela elula yokumisa ipali.Ixhomekeke ikakhulu kwiwintshi encinci kwitripodi ukunyusela ipali.Xa kugxunyekwa ipali, qala ngokushenxisela ipali kwincam yomngxuma, umise i-tripod, kwaye ubeke ipali epalini.Iintambo ezintathu zokutsalwa zibotshelelwa kwincam ukulawula umzimba wepali, emva koko ipali imiswe kwaye iwiswe emhadini wepali, kwaye ekugqibeleni umzimba wepali uyahlengahlengiswa kwaye umhlaba uxinene.
I-cross arm assembly: I-cross-arm yi-bracket yokufakela i-insulators, i-switchgear, i- arresters, njl. Ngokomxholo, kukho iingalo ezinqamlezayo zokhuni, iingalo zentsimbi kunye neengalo ze-ceramic cross-arms.Ingalo yomnqamlezo wentonga kufuneka ifakwe kwicala lomthwalo, kwaye intonga engeyiyo yomgca kufuneka ifakwe kwicala elichasene noxinzelelo.

Iinsulators: Iinsulators zisetyenziselwa ukubamba iingcingo endaweni yazo.Ngoko ke kufuneka ibe neepropati ezaneleyo zokugquma umbane kunye namandla omatshini.I-insulators esetyenziswa ngokuqhelekileyo kwimigca ephezulu ibandakanya i-pin insulators, i-suspension insulators, i-butterfly insulators, njl.

Ulwakhiwo lokutsalwa kocingo: Ukutsalwa kocingo kumgca ongaphezulu kudlala indima yokuxhasa ipali.Ngokubanzi, intonga yekona, intonga yetheminali, intonga yoxinzelelo, njl.njl. kufuneka ibenocingo olutsalayo ukuxhasa ipali, ukuze ingajikwa kukutsalwa kocingo.Ngokuqhelekileyo, i-angle phakathi kwentambo kunye nomhlaba iphakathi kwe-30 ° kunye ne-60 °, kwaye i-cable handle, i-cable handle, kunye ne-cable handle ephantsi ilungiselelwe ngokulandelanayo.

Indlela yokufaka ucingo: ukuxhoma iingcingo kubandakanya ukwandlala, ukuqhagamshela iingcingo, iingcingo ezijingayo kunye neengcingo eziqinisayo, njl. njl. Intlawulo kukukhulula ucingo kwi-spool kwaye ulumise kwipali yokunqumla ingalo.Kukho iindidi ezimbini zoyilo lomgca: indlela yokutsala kunye nokulahla kunye nendlela yokusasaza.Iikhondaktha zocingo ezingaphezulu ziqhele ukudityaniswa ngokudibanisa, ukubopha, kunye nokukrwela.Ukuxhoma ucingo kukutsala ucingo epalini ngentambo encinci kwaye ulubeke kwingalo enqamlezileyo.Ukuqinisa ucingo kukubopha ngokuqinileyo ucingo kwi-insulator kwelinye icala lokumelana noxinzelelo, kwaye uqinise ngocingo oluqinileyo kwelinye icala.I-Sag yi-sag yendalo eyenziwe yi-sag yocingo ngaphakathi kwe-span.

Ukulandelelana kwesigaba sokuhlelwa kwesigaba sesithathu somgca ophezulu kuya kuhlangabezana nezi mfuno zilandelayo: ukusuka kwicala lasekhohlo elijongene nomthwalo, ukulandelelana kwesigaba solungiselelo lomqhubi yi-L1, N, L2, L3, kunye nomgca ongathathi hlangothi ngokubanzi ecaleni kwendlela yepali.Iipali zombane zidla ngokumiswa emantla nasempuma emacaleni endlela.