Umwanya wo gushiraho inyoni zo kwirinda:

Impamvu nyamukuru zitera kwangirika kwinyoni ni flashover yinyoni, umuzenguruko mugufi wibikoresho byumukara wumukara, umuzenguruko muto wumubiri winyoni, nibindi. Muri byo, urugendo rwumurongo rwatewe ninyoni nini zamazi nkumuryango wa Heron hamwe nimiryango yinzoka kuminara ni 90 % yinyoni yangiza ikosa ryumurongo woherejwe, niyo mpamvu nyamukuru yo gutambutsa umurongo winyoni zijyanye nurugendo. Umuzunguruko mugufi wibikoresho byinyoni hamwe n irembo ryumuzunguruko uterwa numubiri muto winyoni bigaragarira cyane cyane kumurongo wo kugabura. Kubwibyo, ingingo yingenzi yo gukwirakwiza kwangirika kwinyoni ni ukurinda kwangirika kwinyoni guterwa ninyoni nini. Kwirinda inyoni ni "urushinge rw'icyuma" rwashyizwe ku munara. Ikigamijwe ni ukubuza inyoni nini kugenda ku munara, kugirango tugere ku ntego yo kurandura inyoni. Kurwanya inyoni bikoreshwa cyane cyane mukurinda flashover ya 110 kV kugeza 500 kV.