EVALUASI SISTEM PROTEKSI PETIR MENARA TELEKOMUNIKASI PT DAYAMITRA TELEKOMUNIKASI (TELKOM GROUP) SIMPANG TIMBANGAN INDRALAYA

Ansyori Ansyori, Faisal Adil Sinaga

Abstract


Abstrak-Petir merupakan fenomena alam yang sering terjadi di Indonesia. Petir juga dapat disebut fenomena alam yang tidak dapat ditebak. Sekarang ini petir jadi permasalahan penting untuk dihadapi. Karena petir dapat merusak bahkan dapat membunuh makhluk hidup. Bangunan menara telekomunikasi yang terletak di simpang timbangan, Indralaya, Ogan Ilir Sumatera Selatan merupakan bangunan tertinggi yang ada di daerah tersebut. Dengan menara setinggi 40 m yang berdiri di tengah pemukiman padat penduduk, maka menara telekomunikasi ini sangat riskan tersambar petir secara langsung yang dapat menyebabkan kenaikan tegangan yang dapat merusak peralataan telekomunikasi. Sambaran tak langsung dapat mengakibatkan timbulnya induksi yang dapat merusak peralatan elektronik pada daerah tersebut. Dengan kepadatan sambaran petir 5,745 sambaran /km2-tahun, arus petir maksimum sebesar 52,906 kA, kecuraman maksimum arus petir sebesar 20,215 kA/μs. kemampuan finial melingungi sejauh 46,44 m. dari hasil perhitungan didapatkan nilai pembumian menara telekomunikasi ini sudah rendah yaitu sebesar 0,6 ohm .Nilai tegangan jatuh pada sistem pembumian sebesar 31,74 kv. Dengan arus petir yang menyambar finial dan disalurkan melalui down conductor maka di sekitar down conductor terjadi tegangan induksi ke peralatan BTS yang nilainya sebesar 1,799 kV.

Kata kunci: sistem proteksi petir, sistem pembumian,menara telekomunikasi

Abstract-Lightning is a natural phenomenon that often occurs in Indonesia. Lightning can also be called a natural phenomenon that can not be guessed. Today lightning so important issues to deal with. Because lightning can damage and even kill human. Telecommunications tower located at simpang timbangan, Indralaya, Ogan Ilir South Sumatra is the tallest building in the area. With a 40 m high tower that stands in the middle of heavily populated, it is very risky telecom tower struck by lightning directly which can cause an increase in voltage and damage telecommunications equipment. Indirect lightning can result in induction that can damage electronic equipment in the area. With a density of 5.745 lightning strikes / km2-year, the current maximum of 52.906 kA lightning, lightning current maximum steepness of 20.215 kA / μs. finial ability protect as far as 46.44 m. obtained from the calculation of the value of the telecommunications tower earthing is already low at 0.6 ohms.Value voltage drop on the earthing system by 31.74 kv. With the current lightning strikes finial and distributed through the down conductor around the down conductor occurs induced voltage BTS equipment to a value of 1,799 kV.

Keyword. lightning protection systems, earthing systems, telecommunication tower


Keywords


sistem proteksi petir, sistem pembumian,menara telekomunikasi

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