What is impedance earthing?

Impedance earthing, also known as impedance grounding, is a method of grounding electrical systems that involves using a resistance or reactance to limit the fault current during a fault condition. This technique helps to maintain system stability and safety by reducing the potential voltage rise on exposed conductive parts and minimizing the risk of electric shock. It is commonly used in industrial and utility applications to improve the reliability of power systems and to protect equipment. By controlling the fault current, impedance earthing can also mitigate the effects of transient overvoltages.