Canja majalisar (canja majalisar) ne wani irin lantarki kayan aiki, canja majalisar waje line shiga cikin majalisar a cikin main sarrafa sauya, sa'an nan kuma shiga rarraba sarrafa sauya, kowane rarraba daidai da bukatun da aka saita. Kamar ma'auni, sarrafa kansa, injin lantarki na magnetic canzawa, nau'ikan AC contactors da sauransu, wasu kuma suna da babban ƙarfin lamba dakin da ƙananan ƙarfin lamba dakin canzawa kabinet, tare da babban ƙarfin lamba motherboard, kamar tashar wutar lantarki da sauransu, wasu kuma suna da ƙananan ƙananan ƙananan kayan aiki don kula da manyan kayan aiki.
Babban rawar switchgear shine buɗewa, sarrafawa da kare kayan aikin wutar lantarki yayin samar da wutar lantarki, watsawa, rarraba wutar lantarki da canjin wutar lantarki. Kayan da ke cikin kayan aiki na majalisar sun ƙunshi masu karya kewaye, masu raba kayan aiki, masu sauya kaya, masu aiki, masu canzawa da na'urorin kariya daban-daban. Hanyoyin rarrabawa na sauya majalisar suna da yawa, kamar ta hanyar shigarwa ta hanyar daidaitawa za a iya rarraba su zuwa mai sauya majalisar da kuma daidaitawa majalisar; Ko bisa ga daban-daban na majalisar tsarin, za a iya raba shi zuwa bude-irin sauya majalisar, karfe rufe sauya majalisar, da karfe rufe shimfidar sauya majalisar; Dangane da ƙarfin lantarki matakin daban-daban kuma za a iya raba zuwa high ƙarfin lantarki sauya majalisar, matsakaicin ƙarfin lantarki sauya majalisar da low ƙarfin lantarki sauya majalisar da sauransu. Yawancin amfani da wutar lantarki tashoshi, substations, petrochemical masana'antu, karfe karafa, haske masana'antu masana'antu, masana'antu ma'adinai kamfanoni da kuma zama yankunan, manyan gine-gine da sauran daban-daban lokuta.