High Resistance Neutral Grounding Device

High Resistance Grounding (HGR) systems are used in power systems where phase to neutral short-circuit current is desired to be limited to zero ampere a few amperes by placing highresistance between neutral point of transformer (or generator) and ground. As it is not possible to locate the fault point in delta connected systems, an artificial neutral point is created and delta connected system can be grounded. This allows a fault current of a few amperes thus locating the fault point becomes easy. When the neutral point is grounded thru high resistance, both continuity of operation is provided during fault condition and sufficient current (between 2A and 10A) flow is provided for ease of locating the fault point.