Abstract
I Gusti Ngurah Rai International Airport Bali previously had a Substation (SS) D which serves the electrical system for the operation of modified Sewage Treatment Plant, however that substation currently under development with the construction of SS VVIP which serves the electrical system for the operation of VVIP buildings and Sewage Treatment Plant. To maintain the security of equipment and humans around the SS VVIP building a good grounding system is needed with a grounding resistance value of <1 Ohm. Because the land at Ngurah Rai Airport is sandy land, the suitable grounding systems are Pelat, Mesh, Grid-Rod groundinh systems [1]. To get an R value <1 Ohm, an analysis of each grounding system is needed, namely Pelat, Mesh, Grid-Rod.The results of the analysis showed that the safest system was the Grid-Rod grounding system with a grounding resistance value of 0.3718 Ohm, a touch voltage value of 223.51 Volt, a step voltage value of 1188.69 Volt and a planning cost of Rp7,712,500. Based on the construction planning data of the SS VVIP Ngurah Rai Airport, the grounding system used is the same as the result of the analysis of the Grid - Rod grounding system.
Highlights
I Gusti Ngurah Rai International Airport Bali previously had a Substation (SS) D which serves the electrical system for the operation of modified Sewage Treatment Plant, that substation currently under development with the construction of SS VVIP which serves the electrical system for the operation of VVIP buildings and Sewage Treatment Plant
The results of the analysis showed that the safest system was the Grid-Rod grounding system with a grounding resistance value of 0.3718 Ohm, a touch voltage value of 223.51 Volt, a step voltage value of 1188.69 Volt and a planning cost of Rp7,712,500
Jurnal Ilmiah Teknik Elektro Universitas Tri Sakti. 15(2). 187- 200
Summary
Bandara Internasional I Gusti Ngurah Rai Bali sedang mengembangkan paket pekerjaan Konstruksi Apron Timur dan Pemindahan Sewage Treatment Plant (STP). Lokasi Bandar Udara Internasional I Gusti Ngurah Rai berada di pinggir pantai dengan tanah berpasir yang memiliki tahanan jenis tanah (ρ tanah) cukup tinggi akan mempengaruhi besarnya gradien tegangan pada permukaan tanah yang akan menyebabkan tegangan sentuh dan tegangan langkah yang melewati batas aman bagi manusia [2]. Membutuhkan jenis sistem pembumian yang tepat dengan nilai tahanan pembumian mendekati nilai nol atau < 1. Sistem pembumian merupakan suatu metode pengamanan gedung beserta peralatan apabila terjadi arus lebih akan dialirkan ke tanah melalui elektroda pembumian sehingga dapat mengamankan komponen-komponen peralatan dan manusia dari gangguan baik itu gangguan surja petir dan hubung singkat. Sistem pembumian yang ideal dengan nilai tahanan pembumian mendekati nol atau < 1 Ohm [3][4]
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