I-GDZK-IV yenzelwe ukulinganisa iqondo le-vacuum ye-vacuum breakers.Isebenzisa indlela yokulinganisa i-electromagnetic discharge, ukuqinisekisa ukuba iziphumo zovavanyo zichanekile kwaye zithembekile.Idatha yovavanyo inokuqikelela impilo kunye nobomi bomtshisi wevacuum.