Izixhobo zokukhusela ze-10kV i-oyile-immersed distribution distribution transformer ikakhulu ibandakanya ukujikeleza i-breaker, i-load switch kunye ne-fuse.  

 Isaphuli sesekethe ekwabizwa ngokuba siswitshi, kwi ukujikeleza ukusuka kwindima yokudibanisa kunye nokuqhawula isiphaluka, kodwa inamandla “arc” anamandla, ngoko ayikwazi ukulawula kuphela ukuphulwa kwezixhobo zombane, kwaye isiphaluka esifutshane siya kuhamba ngokuzenzekelayo.    

 Ukutshintshwa komthwalo kuphuhliswe ngesiseko sokutshintsha okukodwa, oko kukuthi ukutshintshela imela.  Inesakhono sokusebenza esilungileyo kwaye inokunqamla umthwalo wangoku.  Inesakhono esithile “sokucima i-arc”, kodwa isakhono “sokucima i-arc” asisikhulu.  

 I-fuse ikwabizwa ngokuba yi-inshurensi.  Ikwadlala indima ekudibaniseni nasekukhupheni iisekethe.  Kuluhlu lwalo lwamandla, lunamandla “okucima i-arc”, ingasetyenziselwa ukukhusela izixhobo zombane.