Evaluasi Kelayakan Pelapisan Silicone Rubber pada Isolator Longrod SUTT 150 kV Sanur–Gianyar Berdasarkan Aspek Pemeliharaan
DOI:
https://doi.org/10.31004/ijisk.v3i4.855Abstract
Isolator longrod pada saluran udara tegangan tinggi 150 kV di kawasan pesisir rentan terhadap polusi dan kelembapan sehingga memerlukan strategi pemeliharaan yang efektif. Penelitian ini bertujuan membandingkan kinerja teknis isolator keramik berlapis RTV silicone rubber, keramik tanpa pelapisan, dan polimer; membandingkan kelayakan ekonomi ketiganya melalui biaya siklus hidup dan manfaat pengurangan gangguan; serta menentukan kelayakan pelapisan RTV berdasarkan integrasi aspek teknis dan ekonomi. Penelitian menggunakan desain komparatif cross-sectional pada lima tower saluran Sanur–Gianyar dengan parameter tahanan isolasi, arus bocor, intensitas korona, dan kenaikan suhu permukaan. Analisis ekonomi menggunakan horizon 15 tahun dan tingkat diskonto 8%. Dibandingkan keramik tanpa pelapisan, RTV menurunkan arus bocor rata-rata 32,11%, intensitas korona 97,77%, dan kenaikan suhu 80,67%, tetapi tahanan isolasinya 74,07% lebih rendah. Setelah biaya gangguan dimasukkan, biaya siklus hidup keramik tanpa pelapisan, RTV, dan polimer masing-masing sebesar Rp5.890.308.658, Rp2.526.404.904, dan Rp2.769.704.904, dengan nilai kini bersih penghematan RTV Rp3.363.903.753 dan rasio manfaat terhadap biaya 2,33. Indeks kelayakan gabungan sebesar 81,47 untuk polimer, 71,84 untuk RTV, dan 20,72 untuk keramik tanpa pelapisan. Dengan demikian, isolator polimer menjadi alternatif penggantian terbaik, sedangkan pelapisan RTV layak diterapkan secara bersyarat sebagai strategi retrofit dengan pemantauan kondisi lapisan secara berkala.
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