Studi Perencanaan Koordinasi Proteksi Arus Lebih Pada Sistem Kelistrikan PT. Semen Indonesia Pabrik Aceh

Pratama, Erwin Darussalam (2016) Studi Perencanaan Koordinasi Proteksi Arus Lebih Pada Sistem Kelistrikan PT. Semen Indonesia Pabrik Aceh. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT. Semen Indonesia sebagai salah satu pabrik semen terbesar di kawasan Indonesia Timur melakukan rencana penambahan pabrik baru yang berlokasi di Aceh untuk menunjang proses produksi guna memenuhi permintaan pasar. Dengan penambahan pabrik baru di Aceh, dibutuhkan perencanaan pengaman yang baik pada desain sistem kelistrikan yang sudah ada agar kontinuitas produksi tidak terganggu dan nilai keandalan tinggi. Melalui tugas akhir ini dilaksanakan studi koordinasi proteksi arus lebih pada PT. Semen Indonesia pabrik Aceh yang tepat dalam mendeteksi dan mengisolir gangguan sehingga tidak mengganggu sistem yang berjalan dan mencegah kerusakan peralatan listrik. Hasil plot koordinasi kurva arus waktu pada tiap alternatif yang didapat melalui hasil analisis dan perhitungan manual direkomendasikan penyetelan pick uprele arus lebih dan penyetelan grading time rele baik rele arus lebih gangguan fasa maupun rele arus lebih gangguan tanah. Setting rele gangguan tanah untuk trafo distribusi 6.3kV dengan sistem pentahanan NGR 25A direkomendasikan penggunaan setting rele 51G dengan kurva definite karena besar gangguan satu fasa ke tanah merupakan gangguan hubung singkat dan nilainya sesuai dengan NGR. Selain itu dalam alternatif yang dianalisa, nilai setting arus rele 51 gangguan fasa berbeda meskipun pada tipikal yang sama dikarenakan kontribusi besar arus short circuit yang berbeda. ======================================================================================================================== PT . Semen Indonesia as one of the largest cement plant in the eastern of Indonesia is planning to add new plants located in Aceh to support the process of production to meet market demand. With the addition new plant in Aceh, it takes a good protection planning at existing design of electrical system to protect continuity of production and the system have high reliability. Through this final project carried out the correct studies on the over current coordination protection at electrical system PT Semen Indonesia Aceh plant in order to detecting and isolating the fault so the running system is not disturbed and prevent damage to electrical equipment. The results of time current curve in each design of elctrical system plannings obtained from analysis and manual calculation result give the recommendation to set pick up and adjustment grading time of overcurrent relays both of phasa OCR and ground fault relay (GFR). The setting of ground fault relay for distribution trafo 6.3 kV with NGR 25A recommended to use 51G relay with definite curve because the single line to ground fault current is a short circuit fault and matching to the NGR value. Based on analysis in each design of electrical system, the value of pick up setting for 51 OCR phasa is different although in same typical. Its caused the value of contribution short circuit is different in each design.

Item Type: Thesis (Undergraduate)
Additional Information: RSE 621.317 Pra s
Uncontrolled Keywords: Gangguan, koordinasi proteksi, rele arus lebih gangguan fasa, rele arus lebih gangguan tanah
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2861 Electric relays
Divisions: Faculty of Industrial Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User: ansi aflacha
Date Deposited: 24 Feb 2020 08:11
Last Modified: 24 Feb 2020 08:11
URI: http://repository.its.ac.id/id/eprint/75145

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