Grounding System ASSESMENT GROUNDING (EKSISTING) GEDUNG UNIT 1, 2, DAN 3 PEMBANGKIT LISTRIK TENAGA PANAS BUMI (PLTP) KAMOJANG

Abstract

This study discusses the Grounding Assessment activities carried out on Buildings Unit 1, 2, and 3 of the Kamojang Geothermal Power Plant. The Grounding Assessment was carried out with the aim of evaluating the grounding system whether it was sufficient or needed improvement, evaluating the grounding system to improve system reliability, providing recommendations regarding additional protection steps and improving the design. The Grounding Assessment activity was carried out in several stages including conducting a field survey, measuring soil resistivity, processing and interpreting field data, determining the location of the investigation, the geological conditions of Kamojang, evaluating external building protection, and evaluating the results of the internal panel protection survey. From the overall measurement results, it was stated that an increase was needed because the soil resistance value had a value below 5 ohms. This value after further validation had surprising results at several points. Improvements must be made immediately in the Power House area and the lightning protection pole area of the workshop area. System improvements must also be made, namely by clearly dividing the lightning protection grounding system, equipment grounding system, and instrumentation grounding system.