YB27-12 / 0.4 (FR) panja malo oyikiratu (mawonekedwe aku Europe)
1. Utatu wa switchgear wamagetsi othamanga kwambiri, chosinthira komanso chosinthira chotsika kwambiri chimakhala ndi mphamvu yokwanira;
2. Kuteteza kwa voliyumu yayikulu komanso yotsika, ntchito yotetezeka komanso yodalirika, kukonza kosavuta;
3. Kukhala pantchito yaying'ono, kugulitsa ndalama zochepa, kupanga zochepa komanso kuyenda kosavuta;
4. Ndondomeko zamawaya zosintha;