Da'irar monopole muhimmin abu ne na kayan aikin watsa wutar lantarki, yana taka muhimmiyar rawa wajen ingantaccen rarraba wutar lantarki. Ana amfani da da'irori na monopole a matakan ƙarfin lantarki daban-daban, gami da 330kV, 220kV, 132kV, da 33kV, da ...
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