I-220kV eqhelekileyoinqaba yothumelo,ekwaziwa ngokuba yinqaba yothumelo lwamandla, yenzelwe ukuxhasa iintambo zamandla ombane aphezulu ezithwala umbane kumgama omde. Ukuphakama kwezi nqaba kunokwahluka ngokusekelwe kwizinto ezininzi, kubandakanywa indawo yejografi, umhlaba, kunye neemfuno ezithile zentambo yombane eziwuxhasayo. Ngokubanzi, a220kV inqabaukusuka kwi-30 ukuya kwi-50 yeemitha (malunga ne-98 ukuya kwi-164 inyawo) ubude. Lo mphakamo uyimfuneko ukuze kuqinisekiswe ukuba iintambo zothumelo ziphakanyiswe ngokukhuselekileyo ngaphezu komgangatho womhlaba, ukunciphisa umngcipheko wokudibana ngengozi nabantu, izithuthi, okanye izilwanyana.

Uyilo lwe-authumelo lwentambo yombane inqabaasingobude nje; ikwabandakanya ingqwalasela yobunjineli eqinisekisa uzinzo kunye nokuqina. Ezi nqaba ngokuqhelekileyo zakhiwe ngentsimbi okanye ikhonkrithi eyomeleziweyo, izinto ezikhethiweyo ngenxa yamandla azo kunye nokuchasana nezinto ezisingqongileyo. Ulwakhiwo kufuneka lumelane namandla ahlukeneyo, kuquka umoya, umkhenkce, kunye nobunzima beentambo zothumelo ngokwazo.

Ukongeza kubude, isithuba phakathiiinqaba zothumeloyenye inkalo ebalulekileyo yoyilo lwabo. Kwinqaba yombane engama-220kV, umgama phakathi kweenqaba ungasuka kuma-200 ukuya kuma-400 eemitha (malunga ne-656 ukuya kwi-1,312 yeenyawo). Esi sikhewu sichongwa ziipropati zombane kunye nezomatshini kwiintambo zothumelo, kunye nemimiselo yokhuseleko elawula ukuhanjiswa kwamandla.

Phezuluiinqaba zothutho, kubandakanywa iintlobo ze-220kV, zihlala zixhotyiswe ngee-insulators ezithintela umbane ukuba ungavuzi kwindawo. Ezi zithinteli zibalulekile ekugcineni ukusebenza kakuhle kokuhanjiswa kwamandla kunye nokuqinisekisa ukhuseleko lommandla ongqongileyo. Indibaniselwano yobude, isithuba, kunye neteknoloji yesigqubuthelo ivumela ezi nqaba ukuba zithwale ngokufanelekileyo umbane onamandla ombane kumgama omde.

Indima yeenqaba zothumelo idlulela ngaphaya kokusebenza nje; zikwasebenza njengomboniso obonakalayo weziseko zombane ezixhobisa ubomi bethu bale mihla. Umbono wepali yombhobho wothumelo ngokuchasene nesibhakabhaka sisikhumbuzo seenkqubo ezintsonkothileyo ezisa umbane kumakhaya ethu nakumashishini.

Kwiminyaka yakutshanje, kuye kwakho ugxininiso olukhulayo ekudityanisweni kobuhle beenqaba zothumelo kumhlaba. Eminye imimandla iqalisile ukuphonononga uyilo olunciphisa impembelelo yembonakalo ngelixa ihlangabezana nemigangatho eyimfuneko yobunjineli. Lo mkhwa ubonakalisa ulwazi olubanzi ngokubaluleka kolungelelwaniso lweemfuno zeziseko zophuhliso nokuqwalaselwa kokusingqongileyo kunye noluntu.