Ukuvikela ukugcwala ngokweqile kuyisici kumasistimu kagesi esivimbela ukulimala noma ukwehluleka ngenxa yokugeleza kwamanje okudlulele. Ngokuvamile kusebenza ngokuphazamisa ukuhamba kukagesi uma weqa izinga eliphephile, kungaba ngokufutha i-fuse noma ukukhubeka i-circuit breaker. Lokhu kusiza ukuvimbela ukushisa, umlilo, noma ukulimala kwezingxenye ze-elekthronikhi okungase kube umphumela wokugeleza kwamanje okudlulele. Ukuvikela ukulayisha ngokweqile kuyisilinganiso sokuphepha esibalulekile ekwakhiweni kwesistimu kagesi futhi kuvame ukutholakala kumadivayisi afana namabhodi okushintshanisa, ama-circuit breaker namafuse.
PSE