What is Ground Potential Rise?
I’ll try to answer this in as basic terms as I can here in the FAQ section, because this website has an entire section dedicated to answering this question and you will be able to get more detailed information there. A GPR is a phenomenon that happens when a large amount of electricity enters the earth. This happens with lightning strikes, high-voltage line faults and at electrical substations. This electricity must go somewhere, and just like a pebble being thrown into a pool of water, the electricity moves away from the strike point just like the ripples in a pool of water. You can imagine that the closer you are to the strike point, the more electricity you could be exposed to. GPR events are typically measured in Volts. As the electricity travels across the surface of the earth it will come into contact with various objects, including equipment and any personnel standing in its way. There in lies the potential for injury to occur to personnel and damage to occur to equipment. GPR e
