GN30-12 (D) cire haɗin haɗi shine kayan lantarki na cikin gida na ƙimar ƙarfin lantarki 12kV, AC50/60Hz na uku. Ana amfani da shi don yin hutu da canja wurin yanzu don na'urar lantarki ta HV a ƙarƙashin yanayi tare da ƙarfin lantarki da babu kaya. Canjin yana amfani da lambar motsi mai jujjuyawa wacce aka ɗora a kan juzu'in juyawa. Yana rungumi bango ta hanyar shigarwa kuma. An yi shi gwargwadon IEC62271-102