Sianipar, Andre Roberto (2019) Evaluasi Proteksi Pada Sistem Tegangan Menengah dI PT. Industri Gula Glenmore Dengan Mempertimbangkan Arc Flash Menggunakan Metode Perhitungan Yang Dimodifikasi. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sistem kelistrikan industri membutuhkan kontinuitas dan keandalan yang tinggi untuk menjamin keberlangsungan kegiatan produksi. Bila terjadi gangguan pada sistem kelistrikan permasalahan yang muncul adalah kontinuitas penyediaan listrik terhenti, menyebabkan kerusakan peralatan dan timbulnya insiden energi arc flash yang sangat membahayakan keselamatan pekerja. Pada PT. Industri Gula Glenmore, Banyuwangi, setting existing pengaman relay arus lebih belum terkoordinasi dengan tepat sesuai standar. Dari hasil evaluasi proteksi relay arus lebih kondisi existing, kesalahan setting relay yang paling sering dilakukan adalah dalam grading relay. Relay beroperasi bersamaan dan kurva relay saling memotong satu sama lain. Hal ini menyebabkan koordinasi relay menjadi tidak tepat dan tidak selektif. Untuk itu pada tugas akhir ini, dilakukan resetting pada relay arus lebih untuk mendapatkan koordinasi yang tepat dengan grading yang sesuai standar IEEE 242 yaitu 0,2 detik-0,4 detik. Hal ini menyebabkan peningkatan waktu pemutusan gangguan, yang dampaknya meningkatkan energi arc flash. Sehingga pada kondisi resetting energi arc flash yang dihasilkan lebih besar dari kondisi existing. Metode perhitungan energi arc flash yang digunakan adalah metode perhitungan modifikasi yang mempertimbangkan berkurangnya arus kontribusi tiap domain waktu sehingga hasil yang didapat lebih akurat dibandingkan dengan perhitungan standar IEEE 1584-2002. Setelah diketahui energi arc flash kondisi resetting, maka dapat ditentukan jarak aman bagi pekerja serta Personal Protective Equipment (PPE) untuk melindungi pekerja dari bahaya arc flash yang mengacu pada standar NFPA 70E 2015.
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The Industrial electrical system requires continuity and high support to ensure the sustainability of production activities. When there is a disruption in the electrical system the problem that arises is the continuity of the electricity supply being interrupted, causing damage to equipment and the emergence of arc flash energy that is very dangerous for the safety of workers. On PT. Glenmore Sugar Industry, Banyuwangi, the setting of existing relays is not coordinated accord to standards. From the results of overcurrent relay protection evaluations of existing conditions, the most common mistake relay settings are in grading relays. Relays operate together then relay curves intersect each other. This causes the coordination of the relay to be inappropriate and not selective. Therefore, in this final project, the resetting overcurrent relays are done to get the proper coordination with grading according to the IEEE 242 standard, which is 0.2 seconds-0.4 seconds. This condition causes an increase in fault clearing time, which increases incident energy of arc flash. Therefore in resetting relays condition, the incident energy arc flash is greater than the existing conditions. The calculation method of incident energy arc flash used modified calculation method based on the decaying fault current contribution of each time domain, so the results obtained are more accurate than the calculation of the IEEE 1584-2002 standard. Understanding the arc flash energy of resetting condition,, then it can be determined the safety distance for workers and Personal Protective Equipment (PPE) for protective workers from arc flash hazards that conform to the 2015 NFPA 70E standard.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSE 621.319 1 Sia e-1 2019 |
| Uncontrolled Keywords: | relay, arc flash, coordination |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2861 Electric relays |
| Divisions: | Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Andre Roberto Sianipar |
| Date Deposited: | 23 Feb 2023 04:01 |
| Last Modified: | 23 Feb 2023 04:01 |
| URI: | http://repository.its.ac.id/id/eprint/63661 |
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