Akwai wani abubuwa cewa manyan substation 110 kV na farko sun yi amfani da "sauran gabashin karami" a karamin kayayyakin takamawa, inda kayayyakin takamawa sun yi amfani da "sauran gabashin karami" a harkar. Wannan yana nuna a wasu substation 220 kV wanda ke bayar 110 kV karami daga tsofaffuka masu sauran alamar "takamawa uku mai karfi." Wannan shirya ta haɗa da tsofaffuk 2, a karamin 10 kV sun yi amfani da karami daya da gabashin karami.
Abubuwan da suka samun su ne sun hada da hanyar gwaji mai kyau, yanayin amfani mai kyau, hanyar ziyartar gwaji mai sauƙi, da kuma laifi ɗaya da karami 3 a karamin kayayyakin takamawa 2. Kuma karamin kayayyakin takamawa ba ya bukata da inganci masu inganta, saboda an yi amfani a tsari na tsofaffuk ɗaya da karami 3. Amma, akwai ƙasashe da suka faru: karami ɗaya zai iya ɗauka tsofaffuk ɗaya, wanda ya ɓoye magangan ƙwarewa 10 kV. Kuma idan tsofaffuk ɗaya yake da take, duk substation ɗaya zai iya ɗauka, wanda zai iya ɗon ƙwarewa duk substation idan baki ɗaya yake da take.
Don in fadada magangan substation da inganta ƙwarewa, wani babban ƙarfin substation 110 kV ta yi amfani da "sauran gabashin karami mai yawa," a karamin kayayyakin takamawa sun yi amfani da "sauran gabashin karami mai yawa." Wannan shirya ta haɗa da tsofaffuk 3. Kayayyakin takamawa sun yi amfani daga tsofaffuk 110 kV karamin 2 "karami gaba" daga substation 220 kV ɗaya, da karamin 1 "karami tsohuwar" daga substation 220 kV ɗaya.
A karamin 10 kV sun yi amfani da karami daya da gabashin karami, idan zai iya ɗauka karamin tsofaffuk ɗaya a karamin 10 kV zuwa A da B. Wannan hanyar ya kasance magangan ƙwarewa 10 kV da kuma in ɗauka ƙwarewa daga tsofaffuk ɗaya zuwa biyu idan yana da take. Amma, wannan ya ɓace muhimmanci a kan yanayin amfani da kuma hanyar ziyartar gwaji, da kuma laifi mai yawa.
Idan jihohin birnin ya ɗauka, kafin ya ɗauka, da kuma talabinta takamawa ya ɗauka, an yi buƙata don in fadada magangan substation da inganta ƙwarewa. Yanzu, hanyar substation 110 kV na biyu sun yi amfani da karami daya da gabashin karami a karamin kayayyakin takamawa, da kuma tsofaffuk 4 - kila ɗaya ana haɗa da karami ɗaya, da kuma tsofaffuk 2 a tsakanin suna haɗa da kayayyakin takamawa ta hanyar. A karamin 10 kV, ana yi amfani da karami A/B da kuma "gabashin karami 8."
Wannan hanyar ya kasance magangan ƙwarewa 10 kV da kuma inganta ƙwarewa. Haɗin tsofaffuk 2 a tsakanin zuwa kayayyakin takamawa ta hanyar tana ba ƙwarewa a karamin 10 kV 8 gabashi, hatta idan karamin 110 kV ɗaya yake da take. Amma, akwai ƙasashe da suka faru: laifi mai yawa, laifi mai yawa, da kuma muhimmancin yanayin amfani da kuma hanyar ziyartar gwaji.
