Evaluasi penangkal petir mengunakan metode sudut proteksi dan bola gelinding pada gadung Fikes Universitas Borneo Tarakan, petir external pada Gedung Fikes Universitas Borneo Tarakan dan dapat mencegah sambaran petir dengan cara batang elektorda di tancap ke tanah dengan panjang elektroda batang 2 m atau sering di sebut metode tancap yang ada pada Gedung Fikes Universitas Borneo Tarakan. Dengan menggunakan dua metode yaitu metode sudut proteksi dan metode bola gelinding Adapun hasil data yang di ukur di lapangan berserta hasil perhitungan data di yang peroleh adalah sebagai berikut: Data lapangan 0,23 ohm, Data hasil perhitungan terbagi dua yaitu: Data perhitungan menurut data lapangan sebesar (0,75 ohm) dan Data perhitungan menurut SNI sebsar (4,15 ohm), Data hari guruh selama 12 bulan dengan hasil perhitungan terdapat hasil 10,32 Km tahun, Indeks bahaya sambaran petir pada tabel 2.5 dngan hasil yang di peroleh sebesar (12) data curah hujan dengan hasil perhitungan sebesar 5,24 Km²/tahun, Menghitung area proteksi (Ac) pada gedung yaitu: Atap tengah 100 574,29 Km² dan Atap samping 90 416,08 Km², rata rata sambaran petir pertahun Atap tengah 1,0 sambaran petir pertahun, dan Atap samping 0,90 sambaran pertahun, Mengitung efesiensi sambaran petir Atap tengah gedung 0,9% dan Atap samping gedung 0,8%, Data sambaran petir tahun 2022 pada area Universitas Borneo Tarakan sebesar 1,659 A. Nilai probability atau angka perhitungan yang akan terjadi badai petir terdapat sebesar 13,8%, perhitugan jari jari petir 345 m dan hasil lingkaran bola gelinding 67,07 derajat.


Kata Kunci: Metode sudut proteksi dan metode bola gelinding. Gedung FIK/Fakultas Ilmu Kesehatas Universitas Borneo Tarakan.

Evaluation of lightning rods used the protection angle and rolling ball method at Fikes building Universitas Borneo Tarakan, external lightning at Fikes Building Universitas Borneo Tarakan and could prevent lightning strikes by means of the electrode rod being plugged into the ground with a rod electrode length of 2 m or often called the plugging method in Fikes Building Universitas Borneo Tarakan. This research used two methods, namely the angle of protection method and the rolling ball method. The results of the data measured in the field along with the results of the calculation of the data obtained were as follows: Field data was 0.23 ohm, Data from the calculation results was divided into two, namely: Calculation data according to field data was (0.75 ohm) and Calculation data according to SNI was as large as (4.15 ohm), Thunder day data for 12 months with the results of the calculation was 10.32 [Km) ^2/year, Lightning strike hazard index in table 2.5 with the results obtained at (1 2), rainfall data with the calculation results of 5.24 [Km)^2/year, calculating the protection area (Ac) on the building, namely: Middle roof 100 574.29 (Km) ^2 and side roof 90 416.08 [Km) ^2, average lightning strikes per year: Middle roof 1.0 lightning strikes per year, and side roof 0.90 strikes per year, calculating the efficiency of lightning strikes: center roof of the building 0.9% and building side roofs 0.8%, lightning strike data for 2022 in the Universitas Borneo Tarakan area was 1.659 A. The probability value or calculation number that a thunderstorm will occur is 13.8%, the calculation of the radius of lightning is 345 m and the resulting circle of a rolling ball is 67.07 degrees. Keywords: Erth Tester, Protection angle method and rolling ball method, FIK Building/Faculty of Health Sciences, University of Borneo Tarakan