Insights into applications of IEEE Standards for Ground Fault Protection in Industrial and Commercial Power Systems

This paper intends to show some special topics on Ground Fault Protection (GFP). Single line-to-ground (LG) faults are the most common fault type, the protection engineer has to understand how often these occur, the nature and also the effects of a single phase arcing fault. System grounding also affects the magnitude of fault current, protective devices selection and settings. This paper discusses LG and associated issues such as transformer energization, line-charging current. Such considerations shall be addressed when setting grounding relays and to adopt the best LG protection practices.