Abstract :
This project presents a summary of the tests realized with equipment, with the purpose of detecting the high impedance faults that occur in the electrical systems, and also the researches done to evaluate the status of the art of equipment and/or processes used to detect the high impedance faults of the electrical energy distribution system. During the tests, short circuit tests were made, with normal, aluminum and aluminum with steel soul cables, provoking with same fallen cables over several different kinds of soil, with a great variety of contact resistivity with the soil, also the cases of covered cables were tested, used in compact network, in both 13.8 kV and 34.5 kV, proving that these currents of short circuit of cables fallen to the soil are very small.
