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All Journal JITEL (Jurnal Ilmiah Telekomunikasi, Elektronika, dan Listrik Tenaga) Electron: Jurnal Ilmiah Teknik Elektro
Rusiana Iskandar, Handoko
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Overcurrent and ground fault relay protection settings at tranformator-1 150kV/20kV Braga substation Rusiana Iskandar, Handoko; Mulyono, Herry; Charisma, Atik; Hidayat, Muhammad Reza
JITEL (Jurnal Ilmiah Telekomunikasi, Elektronika, dan Listrik Tenaga) Vol. 3 No. 3: September 2023
Publisher : Jurusan Teknik Elektro, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/jitel.v3.i3.2023.181-190

Abstract

The occurrence of a malfunction at the substation results in power outages and losses in the electrical energy distribution system to consumers. Many tests are carried out to see the performance of the protection system, including the parameters of the over current relay (OCR) and ground fault relay (GFR) in the electrical energy distribution system. This research aims to analyze OCR and GFR values, analyze OCR setting, drop-off, and pick-up values, and analyze OCR time characteristics using DigSilent Power Factory 15.1 software based on existing equipment specification data at the Braga substation. The results show an OCR accuracy level of around 94% on the 20 kV and 150 kV sides. Meanwhile, 92.39% on the 20 kV GFR side and 94.87% on the 150 kV side. The setting value for the pick-up current is 0.92 A on the 20 kV side of the GFR and the drop-off current is 0.85 A on the 150 kV side with a pick-up current of 0.39 A and a drop-up current of 0.37 A. Setting a value on the 20kV side is greater than on the 150 kV side due to the difference in current transformer ratio values. The simulation results show that the OCR and GFR characteristic curves on both sides meet the criteria for a protection system with good performance.
Pengaruh Penambahan Slot Terhadap Kinerja Antena WLAN Charisma, Atik; Pratama, Reja; Rusiana Iskandar, Handoko; Haz, Fauzia
ELECTRON Jurnal Ilmiah Teknik Elektro Vol 4 No 1: Jurnal Electron, Mei 2023
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/electron.v4i1.41

Abstract

One of the devices that plays an important role in the performance of Wireless LAN (WLAN) is the antenna. Microstrip antennas are generally used in high-frequency technology designs. Therefore it is suitable for increasing WLAN performance that works at the 2.4 GHz frequency. In this study, adding slots to the antenna to improve WLAN performance. The array antenna 2x1 is designed to work at the WLAN frequency of 2.4 GHz. The gain produced by this antenna is 3.8 dB which is very influential in strengthening the WLAN antenna signal.
Co-Authors Charisma, Atik Haz, Fauzia Herry Mulyono Hidayat, Muhammad Reza Pratama, Reja