PENGARUH SISTEM PENTANAHAN GARDU DISTRIBUSI TERHADAP TEGANGAN SENTUH

Abstrak

The grounding system at the distribution substation is needed to overcome the touch potential on the transformer or other conductor objects attached to it. The maximum limit of touch potential which is still considered not harmful humans is 50 volts (PUIL 2000). One of touch potential happen is due to the unqualified grounding system factor and the short circuit fault current flow in a closed circuit. This condition is harmful for humans who touch it and can cause death. This study aims to compare the existing (Solid Grounding) and the new grounding systems (Grid Grounding) at distribution substations and to find out that these grounding systems are safe for humans. The method used is the measurement of the existing ground (solid grounding) and the measurement in the new system (Grid System Grounding) with a total of 20 integrated system points. The measurement data is used to calculate the amount of touch potential in each of these systems. The results of the research, the existing 5.056 ohm grounding condition can cause a touch potential of 1013.906 volts, the grid system from the 20 point trial results obtained 0.16 Ohm and a touch potential of 42.14 volts. The conclusion is that the condition of the existing grounding system has not been able to minimize the level of touch potential harmful to humans, while the grid system can protect humans from the danger of touch potential.

Keywords: Grounding System, Touch Potential, Distribution Transformer.