GN30-12 Imbere mu kuzenguruka hejuru ya voltage itandukanya swithc ni ubwoko bushya bwo kwigunga hamwe nicyuma cyizunguruka, ni ikintu nyamukuru ni ugushiraho ibice bibiri bya insulator hamwe no guhuza indege zo hejuru no hepfo yindege eshatu zisanzwe hamwe no kumenya gufungura no gufunga switch muguhinduranya icyuma cyo guhuza.
Gn30-12D yo mu nzu izenguruka cyane ya voltage itandukanya ibintu ishingiye kuri GN30-12 yo mu nzu izenguruka hejuru ya voltage yo mu bwoko bwa swithc ishobora guhuza ibikenerwa na sisitemu zitandukanye, iki gicuruzwa gifite igishushanyo mbonera gifite umwanya muto.ubushobozi bukomeye bwo gukumira no kwishyiriraho byoroshye no kubihindura, ni imikorere yujuje ibyangombwa bisabwa na GB1985-89 AC hight voltage itandukanya amashanyarazi na sisitemu yo hasi, irakwiriye kuri sisitemu yo murugo ifite voltage iri munsi ya 10kv AC50 Hz kandi irashobora gukoreshwa mugukingura no gufunga imirongo munsi imiterere ya voltage kandi ntamuzigo irashobora gukoreshwa hamwe nibikoresho byo hejuru bya voltage cyangwa gukoreshwa wenyine.