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All Journal International Journal of Electrical and Computer Engineering Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan POSITRON JURNAL PENGABDI BULETIN AL-RIBAATH International Journal of Community Service Learning Jurnal Teknologi Informasi : Jurnal Keilmuan dan Aplikasi Bidang Teknik Informatika ASEAN Journal of Chemical Engineering REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat JUSTIN (Jurnal Sistem dan Teknologi Informasi) Eksergi: Jurnal Teknik Energi eProceedings of Engineering Telecommunications, Computers, and Electricals Engineering Journal Journal of Electrical Engineering, Energy, and Information Technology
Kusumawardhani, Eka
Department Of Electrical Engineering, Universitas Tanjungpura
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Mechanical Engineering Medicine & Pharmacology Physics Social Sciences

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Transformer Oil Quality Monitoring Towards Degradation of Insulation Breakdown Voltage Maleiva, Lalak Tarbiyatun Nasyin; Ningsih, Melly Mulya; Kusumawardhani, Eka; Putra, Leonardus Sandy Ade; Nugraheni, Putranty Widha
Eksergi Vol. 18 No. 3 (2022): SEPTEMBER 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v18i3.3738

Abstract

The transformer is one of the critical pieces of equipment for distributing electrical energy from the generator connected to the transmission to the consumer of Diesel and Gas Power Generation Service Units (ULPLTD/G). Therefore, the existence of insulation is essential due to its function as a separator among the transformer core and as a transformer cooler to minimize the heat that arises in the transformer. Hence, the objective of this research was to evaluate the transformer oil quality. The procedure was executed by observing the transformer and collecting data directly from the diesel machine of SWD 2, SWD 3, and SLZ 5. The results revealed that the breakdown voltage of transformer oil categorized as good was SLZ 5 oil with an average of 59,983, and the less good was SWD 2 oil with an average of 34.516. Furthermore, by observing the test results for new and used transformer oil, the breakdown voltage value for new transformer oil was always higher than used oil. Eventually, the transformer efficiency achieved was 95.58%.
DESIGN AND IMPLEMENTATION OF AN 11-ELEMENT YAGI ANTENNA AS AN INTERNET SIGNAL BOOSTER IN MENYABO VILLAGE Setiawan, Geri; Kusumawardhani, Eka; Suryadi, Dedy
Telecommunications, Computers, and Electricals Engineering Journal (TELECTRICAL) Vol 3, No 1: June 2025
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/telectrical.v3i1.92536

Abstract

The Yagi antenna is a type of directional antenna designed to enhance signal reception and transmission in a specific direction. In this study, the MMANA-GAL software was utilized to design and simulate the antenna with a high level of accuracy. The aim of this research is to design and implement an 11-element Yagi antenna capable of capturing signals from a Base Transceiver Station (BTS) to improve weak signal quality in Menyabo Village. Antenna testing was conducted using the MMANA-GAL application for simulation, along with SpeedTest and GNetTrack (GNet-WiFi) applications for measuring signal performance. Based on the results of the design, simulation, and testing phases, it can be concluded that the designed antenna meets the desired specifications. Simulation results indicate that the 11-element Yagi antenna has an impedance of 50 Ohms, a VSWR value of 1:1.00, and a gain of 12.8 dBi. Field testing results demonstrated improved signal performance. Prior to connecting the antenna, SpeedTest results showed a ping of 61 ms, download speed of 0.40 Mbps, and upload speed of 1.70 Mbps. After connecting the antenna at a height of 10 meters, the values improved to a ping of 39 ms, download speed of 1.06 Mbps, and upload speed of 1.46 Mbps. At 12 meters, the results further improved to a ping of 38 ms, download speed of 2.67 Mbps, and upload speed of 1.58 Mbps. Regarding RSSI measurements, before connection, the signal strength was -77 dBm. After connecting the antenna, the RSSI improved to -51 dBm at 10 meters and -41 dBm at 12 meters. Based on these findings, it can be concluded that the designed 11-element Yagi antenna successfully enhances signal quality and meets the targeted specifications.
ANALYSIS OF THE SUCCESS LEVEL OF WIRELESS DATA COMMUNICATION PERFORMANCE USING SX1278 TRANSCEIVER AT 433 MHz SPECTRUM Pratiwi, Anggie; Marpaung, Jannus; Kusumawardhani, Eka
Telecommunications, Computers, and Electricals Engineering Journal (TELECTRICAL) Vol 2, No 1: June 2024
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/telectrical.v2i1.77614

Abstract

In wireless communication, the success of information exchange is a critical aspect, evaluated based on parameters such as Packet Delivery Ratio (PDR) and packet loss. Several factors, such as antenna gain, antenna height, and transmission distance, if not appropriately configured, can result in a small packet data ratio due to the loss of packets in wireless communication, leading to a lack of received information. Therefore, research has been conducted to identify and understand the causes of a small packet data ratio due to packet loss. The results obtained from this research show a Packet Delivery Ratio (PDR) of 100% and packet loss of 0% with the use of a 3 dBi gain antenna, which is only able to reach a distance of 400 meters. Meanwhile, the use of a 5 dBi gain antenna can reach a distance of 800 meters. Increasing the gain antenna can enhance the transmission distance. In terms of antenna height variation, a 3 meter height achieves a Packet Delivery Ratio (PDR) of 100% and packet loss of 0%, covering a distance of 600 meters, while the use of a 6-meter antenna height can reach a distance of 800 meters. Increasing the antenna height can improve the transmission distance.
ANALYSIS OF 5G CELLULAR TECHNOLOGY PATHLOSS PREDICTION ON MICRO URBAN CELLS USING ABG PREDICTION MODEL IN PONTIANAK CITY Theodorus Barahama, Alfodaniel; Imansyah, Fitri; Kusumawardhani, Eka
Telecommunications, Computers, and Electricals Engineering Journal (TELECTRICAL) Vol 1, No 3: February 2024
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/telectrical.v1i3.69802

Abstract

The implementation of 5G cellular technology in Indonesia needs to be studied in several aspects. So that several cellular operators in Indonesia have experienced difficulties in implementing 5G cellular technology in Indonesia, especially in Pontianak City. Therefore, the analysis of pathloss values in cellular systems is an approach to large-scale fading aspects to calculate service coverage. This research calculates the pathloss value with a case study in Pontianak City with micro urban cell characteristics. In this research, ABG (Alpha-Beta-Gamma) prediction model is used with working frequency of 3.5 GHz and 28 GHz with bandwidth of 100 MHz. The calculation results of the ABG prediction model at a frequency of 3.5 GHz has a value of 91.78 dB for LOS conditions and in NLOS conditions has a value of 123.26 dB. While at a frequency of 28 GHz the pathloss value generated is 110.71 dB in LOS conditions, while in NLOS conditions the value is 140.42 dB. The 28 GHz working frequency has a slightly higher pathloss value than the 3.5 GHz frequency and has a difference in value of 18.99 dB for LOS conditions while in NLOS conditions it has a difference in value of 17.16 dB.
DESIGN ANTENNA MIMO 2X2 PATCH RECTANGULAR FOR WIFI 6 APPLICATIONON 5GHZ BAND Endrian, Ielfandi; Kusumawardhani, Eka; Marpaung, Jannus
Telecommunications, Computers, and Electricals Engineering Journal (TELECTRICAL) Vol 1, No 3: February 2024
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/telectrical.v1i3.73098

Abstract

The development of wireless network technology, particularly WiFi 6 at 5GHz, offers greater reliability and data transfer capacity. Antenna design is a crucial aspect in optimizing WiFi 6 networks in complex wireless environments. The study examined a rectangular patch 2x2 MIMO Antenna for WiFi 6 at 5GHz with a focus on improving network parameters such as return loss, bandwidth, VSWR, and gain. The use of various methods and references from Balanis (2005) and Webster (2021) supports the development of antenna technology, while previous research by Ni Putu Kartika Dewi (2019) strengthens the understanding of microstrip antennas for LTE applications. The main objectives of the study were to design and simulate a rectangular patch 2x2 MIMO Antenna for WiFi 6, as well as analyze simulation data using CST Studio Suite 2019 software. This research uses hardware in the form of Acer Aspire laptops and CST Studio Suite 2019 as simulation software and antenna design. The simulation results show that this antenna is able to work in the frequency range of 4.5-5.2 GHz with a bandwidth of 55.4 MHz and return loss of -20.677981 dB, VSWR 1.2038357, and gain 3.429 dBi with omnidirectional radiation patterns. However, the addition of antenna patches has an impact on decreasing gain. This study provides an in-depth understanding of MIMO antenna design to support WiFi 6 performance in complex wireless environments.
Co-Authors Ade Elbani Ade Kurniawan Aini Sulastri Al Muflihin, Amru Hisyam Annisa, Tiara Apriza, Uray Dini Aulia, Nizza Bambang Hidayat Chandra Wahyu Purnomo Damanik, Aufar Martanggi Dedy Suryadi Dedy Suryadi Elang Derdian Marindani Endrian, Ielfandi Fajar Ramadhani Febrianti, Putri Adhelia Fitri Imansyah Gunawan, Vincentius Abdi Hajirin, - Jannus Marpaung Jannus Marpaung Jumiati Jumiati Kurnawan, Wawan Lalak Tarbiyatun Nasyin Maleiva Lora Simir Mawaldi, Ikbal Meliani Benedikta Nachwan Mufti Adriansyah Neilcy Tjahja Mooniarsih Ningsih, Melly Mulya Nugraheni, Putranty Widha Pakpahan, Kristin Karuniawaty Pontia W, F. Trias Pradhesta, Lena Endriana Pratiwi, Anggie Prio Utomo Putra, Leonardus Sandy Ade Putranty Widha Nugraheni Redi Ratiandi Yacoub Remianda, - Rina Pudji Astuti Rudi Kurnianto Sentosa, Adi Setiawan, Geri Siregar, Niko Suci Aulia Theodorus Barahama, Alfodaniel Wicaksono, Romario Aldrian Widiantoro, Andreas Gunawan Yacoub, Redi Yudhi Wiranto Zainal Abidin Zainal Abidin Abidin