Electronic Theses and Dissertation

Gedung Teknik Kimia Universitas Syiah Kuala telah dilengkapi dengan sistem proteksi petir eksternal tipe Sangkar Faraday untuk melindungi bangunan dan peralatan di dalamnya dari sambaran petir. Namun, efektivitas sistem tersebut belum pernah dievaluasi secara teknis berdasarkan standar yang berlaku. Penelitian ini bertujuan untuk menganalisis kondisi eksisting sistem proteksi petir, mengevaluasi kesesuaiannya terhadap standar nasional dan internasional, serta menentukan jangkauan perlindungan menggunakan metode Rolling Sphere. Metode penelitian dilakukan melalui observasi lapangan, pengukuran teknis komponen sistem, analisis risiko sambaran petir, serta pemodelan geometri bangunan. Hasil penelitian menunjukkan bahwa sistem proteksi petir terdiri dari 15 terminal udara, 12 konduktor penyalur, dan 12 elektroda pentanahan dengan nilai tahanan tanah sebesar 4 Ω, yang masih memenuhi persyaratan standar. Analisis risiko sambaran petir menghasilkan Level Proteksi Petir IV, sehingga digunakan radius Rolling Sphere sebesar 60 meter. Berdasarkan hasil pemodelan Rolling Sphere, seluruh permukaan atap gedung berada dalam zona perlindungan, di mana bola bergulir tidak menyentuh struktur bangunan. Hal ini menunjukkan bahwa secara geometris dan teknis, sistem proteksi petir tipe Sangkar Faraday yang terpasang telah mampu memberikan perlindungan terhadap sambaran petir langsung. Meskipun demikian, ditemukan beberapa ketidaksesuaian pada kondisi konduktor penyalur dan sistem pentanahan yang memerlukan perbaikan untuk meningkatkan keandalan sistem secara keseluruhan.

The Chemical Engineering Building of Universitas Syiah Kuala is equipped with an external lightning protection system of the Faraday Cage type to protect the building and its internal equipment from lightning strikes. However, the effectiveness of the installed system has not previously been evaluated technically based on applicable standards. This study aims to analyze the existing condition of the lightning protection system, evaluate its compliance with national and international standards, and determine the protection coverage using the Rolling Sphere method. The research methodology includes field observation, technical measurement of system components, lightning risk analysis, and geometric modeling of the building. The results show that the lightning protection system consists of 15 air terminals, 12 down conductors, and 12 grounding electrodes, with a measured earth resistance value of 4 Ω, which still meets the standard requirements. Lightning risk analysis indicates that the building falls under Lightning Protection Level IV, therefore a Rolling Sphere radius of 60 meters is applied. Based on the Rolling Sphere modeling, the entire roof surface of the building lies within the protection zone, where the rolling sphere does not directly contact the building structure. This indicates that, from a geometric and technical perspective, the installed Faraday Cage lightning protection system is capable of providing protection against direct lightning strikes. Nevertheless, several nonconformities were identified in the condition of the down conductors and grounding system, which require improvements to enhance the overall reliability of the lightning protection system.