RANCANGAN REINSTALASI JARINGAN DISTRIBUSI TEGANGAN MENENGAH PADA GARDU INSTRUMEN LANDING SYSTEM BANDAR UDARA HALIM PERDANAKUSUMA

Perkembangan operasional Bandar Udara Halim Perdanakusuma menuntut sistem
distribusi tenaga listrik yang andal untuk menjamin kontinuitas pasokan pada Gardu
Instrument Landing System (ILS). Kondisi eksisting menunjukkan gangguan pada
jalur looping, penurunan tahanan isolasi kabel tegangan menengah, serta
transformator step-up 380 V/6 kV yang telah beroperasi sejak tahun 1973 sehingga
melampaui umur teknisnya. Kondisi tersebut berpotensi menurunkan kinerja sistem
dan mengganggu operasional peralatan navigasi penerbangan. Penelitian ini
bertujuan merancang reinstalasi jaringan distribusi tegangan menengah 6 kV pada
Gardu ILS untuk meningkatkan kontinuitas sistem kelistrikan. Metode penelitian
menggunakan pendekatan Research and Development (R&D) Level 1 melalui
tahapan identifikasi masalah, pengumpulan data teknis, analisis kebutuhan,
perancangan sistem, perhitungan pembebanan transformator, evaluasi jatuh
tegangan, serta simulasi menggunakan ETAP. Hasil perancangan
merekomendasikan penggunaan transformator kering (dry type cast resin)
berkapasitas 315 kVA dan kabel tegangan menengah 3 x 35 mm2 N2XSEFGbY 6
kV yang memenuhi kebutuhan beban serta meningkatkan profil tegangan dan
kinerja sistem yang lebih andal dibandingkan kondisi eksisting. Rancangan ini
diharapkan menjadi acuan teknis dalam mendukung kontinuitas operasional dan
keselamatan sistem navigasi penerbangan.
Kata kunci: Gardu ILS, Distribusi Tegangan Menengah, ETAP 19.01, Reinstalasi.

The operational development of Halim Perdanakusuma Airport demands a reliable
power distribution system to ensure continuity of supply at the Instrument Landing
System (ILS) Substation. The existing condition shows disruptions in the looping
path, decreased insulation resistance of medium voltage cables, and a 380 V/6 kV
step-up transformer that has been in operation since 1973, thus exceeding its
technical lifespan. These conditions have the potential to reduce system
performance and disrupt the operation of flight navigation equipment. This study
aims to design the reinstalation of a 6 kV medium voltage distribution network at
the ILS Substation to improve the reliability and continuity of the electrical system.
The research method uses a Level 1 Research and Development (R&D) approach
through the stages of problem identification, technical data collection, needs
analysis, system design, transformer loading calculation, voltage drop evaluation,
and simulation using ETAP. The design results recommend the use of a 315 kVA
dry type cast resin transformer and a 3 x 35 mm2 N2XSEFGbY 6 kV medium voltage
cable that meets the load requirements and improves the voltage profile and system
performance more reliably compared to the existing condition. This design is
expected to serve as a technical reference to support the operational continuity and
safety of the aviation navigation system.
Keywords: ILS Substation, Medium Voltage Distribution, ETAP 19.01,
Reinstallation.