GCK ituaiga maualalo-voltage toso switchgear o loʻo faʻaaogaina i le eletise, substations, petrochemical, metallurgical rolling, malamalama fale gaosi oloa ma isi fale gaosimea ma pisinisi maina ma nofoaga e nonofo ai, fale maualuluga ma isi nofoaga, e pei o AC 50 ~ 60Hz, fuaina voluma galue. AC 660V ma lalo ifo o le faʻaogaina o le eletise o mea faʻapipiʻi eletise mo le faʻaliliuina o le mana, tufatufaina ma le pulea.