Analisa Percepatan Umur Isolator Keramik pada Saluran Distribusi 20 kV di Daerah Pesisir Pantai Akibat Kontaminan Udara

Santosa, Dirman Hariono (2017) Analisa Percepatan Umur Isolator Keramik pada Saluran Distribusi 20 kV di Daerah Pesisir Pantai Akibat Kontaminan Udara. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pada tugas akhir ini, menganalisa karakteristik isolator keramik, yang meliputi arus bocor dan tegangan breakdown isolator akibat kontaminan udara pada pesisir pantai. Diketahui bahwa besar ESDD di daerah Gresik sebesar 0,3994 gr/cm2 dengan kandungan kontaminan yaitu, K (0,31%), Na (7,4%), Ca (31,54%), dan Mg (30,77%). Prekondisi isolator dilakukan menggunakan metode salt-fog dengan salinasi garam bertingkat, dimulai dari 9,409 kg/m3 hingga 65,863 kg/m3. Modul pengujian salt-fog berukuran 1x1x1,3 m3. Pelaksanaan salt-fog dilakukan sesuai dengan tingkatan salinasi selama 3 jam, setelah itu dilanjutkan penyinaran UV dan pengeringan kontaminan pada permukaan isolator menggunakan heater selama 6 jam. Selanjutnya isolator diuji pada rangkaian breakdown voltage test dan leakage current test, serta dilakukan SEM-test, dengan sampel yang digunakan adalah isolator keramik bersalinasi 65,863 kg/m3 dan tanpa kontaminan Dari hasil pengujian didapatkan tegangan breakdown lewat denyar isolator menurun tiap kenaikkan salinasi garam. Hal ini terlihat dari nilai tegangan breakdown lewat denyar isolator terbesar ketika Isolator tanpa proses salt-fog (tanpa prekondisi) yaitu sebesar 54 kV sedangkan nilai terkecil sebesar 24 kV ketika isolator bersalinasi 65,863 kg/m3. Nilai arus bocor isolator meningkat sebanding dengan besar salinasi garam. Hal ini bisa terlihat dari nilai arus bocor rata-rata isolator terkecil ketika Isolator tanpa proses salt-fog (tanpa prekondisi) yaitu sebesar 0,648 mA, sedangkan nilai arus bocor terbesar, yaitu 4,629 mA didapatkan ketika isolator bersalinasi 65,863 kg/m3. ================================================================= In this final project is analyzing the characteristics of ceramic insulators, which is leakage current and breakdown voltage of insulators due to air contamination on the coast. It is known that the ESDD of Gresik area is 0.3994 gr / cm2 with contaminant content such as, K (0.31%), Na (7.4%), Ca (31.54%), and Mg (30.77%), Insulator conditioning was performed using salt-fog method that chamber dimention is 1x1x1,3 m3. The salt-fog was performed according to the salination level during 3 hours. After that, UV irradiation and contaminant drying on the surface of the insulators using heater during 6 hours. Furthermore, the insulator is tested on the circuit breakdown voltage test and leakage current test and also SEM-test is done in insulator with salinity is 65.863 kg/m3 and without salt-fog (without conditioning). From the test, it is looked that the breakdown voltage of the insulator decreases each salinity increase. This is seen from the breakdown voltage value through the largest isolator when the isolator without salt-fog (without conditioning) that is equal to 54 kV while the smallest value of 24 kV when salinity is 65.863 kg/m3. The leakage current value of the insulator increases in proportion to the salinity. This can be seen from the average leakage current value of the smallest isolator when the isolator without salt-fog process (without conditioning) that is equal to 0.648 mA, while the largest leakage current value, which is 4.629 mA obtained when salinity is 65.863 kg/m3.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: isolator keramik, salt-fog, arus bocor, tegangan breakdown lewat denyar, ceramic insulator, salt-fog, leakage current, breakdown voltage
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK201 Electric Power Transmission
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Industrial Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User: Dirman Hariono Santosa
Date Deposited: 15 Sep 2017 06:08
Last Modified: 05 Mar 2019 04:17
URI: http://repository.its.ac.id/id/eprint/42700

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