Agba nke mkpuchi mkpuchi isi nke njikwa eriri na-adịkarị oji na ọcha, na obere voltaji nke eriri ike na-ekewakarị agba. Ụkpụrụ maka eriri njikwa bụ 9330, na ọkọlọtọ maka eriri ọkụ bụ GB12706. Na eriri ọkụ na-achọ ka n'ọbọ waya nwee ike mkpakọ zuru oke, ike ọdụdọ, okpomọkụ na-eguzogide na corrosion iguzogide. Achọrọ eriri njikwa dị ntakịrị. Mgbe a na-emepụta eriri ọkụ eletrik ụlọ ọrụ mmepụta ihe na eriri njikwa nke otu nkọwapụta, mkpuchi mkpuchi na mkpuchi mkpuchi nke eriri ike dị oke karịa nke eriri njikwa.
Igwe njikwa na-ebufe ọkụ eletrik ozugbo site na ebe nkesa nke sistemu ike na ahịrị njikọ ọkụ eletrik nke akụrụngwa na ngwa eletrik dị iche iche., ebe a na-ejikarị eriri ọkụ na-emepụta ike, nkesa, nnyefe, mgbanwe. Na nnyefe nke ike eletrik siri ike na eriri ọkụ ọkụ, nke ugbu a na-agafe bụ nnukwu, na eriri ọkụ na-eji na isi ahịrị nke usoro ike na-ebufe na ikesa nnukwu eletriki ike.
Igwe ọkụ bụ waya ibu ibu, ikike ibu nke ugbu a na-abawanye na mmụba nke ike. Na ngalaba ngwa nke waya ga-abawanye na nke ugbu a. Ya mere nkọwapụta nke eriri ọkụ na-adịkarị ibu, buru ibu ka 500 square mita (nso na omenala ndị na-emepụta ihe nwere ike imepụta). Enwere ndị nrụpụta ole na ole nwere ike ime ya.
Na eriri njikwa bụ waya iwu nke abụọ, nke na-achịkwa ọrụ na-ebu ugbu a nke ngwaọrụ, ibu ugbu a dị oke obere. Na waya cross-ngalaba bụ nnọọ obere. Ya mere, akụkụ obe nke eriri njikwa na-adịkarị obere, na kacha bụ n'ozuzu bụghị karịa 10 square mita.
Ọdịiche dị n'etiti voltaji elele nke eriri ọkụ na eriri njikwa: voltaji nke agbagoro nke ike eriri bụ n'ozuzu 0.6/1kV na n'elu, na eriri njikwa bụ tumadi 450/750V.
Ọnụ ọgụgụ nke cores nke eriri ọkụ dị obere, e nwere otu-isi, isi abuo, 3-isi, 4-isi (atọ-adọ anọ-waya usoro), 5-isi (usoro waya ise nke atọ), dị ka ihe achọrọ nke grid ike, kacha bụ n'ozuzu 5 isi. A na-eji eriri njikwa na-ebufe akara njikwa, na ọnụ ọgụgụ nke cores dị ukwuu, sitere na 2 cores ka 61 isi, ma ọ bụ ọbụna karịa. Igwe njikwa ahụ na-anabatakwa usoro isi dị iche iche, mkpuchi na usoro ndị ọzọ iji nweta mmetụta ndakọrịta elektrọn na-eju afọ.
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