Tsarin Gwajin Wutar Lantarki ana amfani dashi galibi don aiwatar da cikakken gwajin ƙarfin walƙiya na walƙiya, gwajin tsinkewa da sauya gwajin motsawa akan na'urorin HV kamar su masu canza wuta, mai kamawa, insulators, bushings, capacitors, da masu sauyawa.Yana iya haifar da daidaitaccen igiyar walƙiya, igiyar juyawa, igiyar sarewa tare da faffadan ƙarfin lantarki da ƙarfi.