Prateek Gaure - IPS PowerServe

Typically, over 65-70% of faults experienced in power distribution networks are ground faults. Ground fault detection and isolation are, hence, crucial tasks. Detecting ground faults can be challenging, depending on the distribution network. The type of grounding employed in the distribution network can be classified as solidly grounded, low-impedance grounded, high-impedance grounded, resonant grounded, and ungrounded. Not only grounding configuration but load connection and available fault current are factors contributing to the challenges. In this presentation, we will revise the different grounding practices before diving deeper into ungrounded networks. We will also discuss the possible solutions for ground fault detection on an ungrounded network with traditional protection schemes as well as modern microprocessor-based relay schemes.