| Title |
A Study on the Grounding Resistance Effects of Power Transformer in Electric Distribution Systems |
| Authors |
Kyung-Chul Kim ; Ji-Won Jung ; Kyu-Jin Lee ; Kang-Soo Lee ; Sun-Kyu Choi |
| Keywords |
Transformer Grounding Resistance ; Neutral To Earth Voltage ; Touch Voltage ; Safety Criteria |
| Abstract |
A safe grounding design is used for providing means to carry electric currents into the earth under fault conditions without exceeding any operating limits and for assuring that a person in the vicinity of grounded facilities is not exposed to danger of critical electrical shock. Transformer neutral point grounding is for the purpose of controlling the voltage to earth within tolerable limits under a line-to-ground fault. Transformer frame grounding is for the purpose of minimizing the hazardous potential within safety criteria appearing at the faulted equipment. This paper deeply investigates the grounding resistance effects of distribution power transformers by analysing the neutral to eatth voltages and touch voltages when the fault occurs. |