1.Sekela izivumelwano zokushaja ngokushesha njenge-PD/QC/AFC/FCP
2.Ukushaja okuphephile nokusheshayo ngaphandle kokulimaza ibhethri
3.Ngaphezulu kokungu-80% kokushaja okugcwele emizuzwini engama-40
4.Ukuvikela okuningi kokuphepha, i-overvoltage, undervoltage, overcurrent, short circuit, overtemperature, njll.