I-GDZK-IV yakhelwe ukukala izinga le-vacuum yama-vacuum breakers.Isebenzisa indlela yokulinganisa ukukhishwa kwe-electromagnetic, ukuze kuqinisekiswe imiphumela yokuhlola inembile futhi inokwethenjelwa. Idatha yokuhlola ingalinganisela impilo nempilo ye-vacuum breaker.