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All Journal JURNAL SIMETRIK Saintifik : Jurnal Matematika, Sains, dan Pembelajarannya Jurnal Pengabdian Masyarakat Iron (sipil, elektro,mesin) International Journal Of Science, Technology & Management (IJSTM) Jurnal ELKO (Elektrikal dan Komputer) Journal of Health, Education, Economics, Science, and Technology (J-HEST) RENATA Jurnal Pengabdian Masyarakat Kita Semua EBAMUKAI; JURNAL PENGABDIAN ILMU PENGETAHUAN DAN TEKNOLOGI Journal of Digital Market and Digital Currency
Mbitu, Elisabeth Tansiana
Politeknik Negeri Ambon
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Journal : International Journal Of Science, Technology

 1 
Short-Circuit Analysis of the Saparua Distribution Feeder Network Mbitu, Elisabeth Tansiana; Jamlaay, Marselin; Sahusilawane, Ferdiaztha Rendy
International Journal of Science, Technology & Management Vol. 6 No. 4 (2025): July 2025
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v6i4.1337

Abstract

Short-circuit faults are a type of disturbance that impedes the transmission of electrical energy. To protect equipment from the impact of such faults, short-circuit analysis is conducted. In this study, the magnitudes of phase-to-phase and phase-to-ground short-circuit currents are calculated, along with the determination of overcurrent relay and circuit breaker ratings on the distribution network of PT PLN Saparua Rayon, Maluku. The analysis is carried out using ETAP software on generator busbars and feeders at various fault locations. PT PLN (Persero) Saparua Rayon operates four feeders: Saparua, Pohar, Tenggara (Southeast), and Hatawano. Simulation results show that the Saparua feeder has the highest fault current at bus 6 under an L-L-G fault condition, while the Tenggara, Hatawano, and Pohar feeders exhibit their highest fault currents at the generator bus under an L-G fault. It is evident that the L-L-G (double line-to-ground) fault consistently generates the highest short-circuit current when compared to other types of faults such as L-L (line-to-line) and three-phase faults. This type of fault involves a direct connection between two phases and the ground, resulting in a larger fault current due to lower overall impedance at the fault point. Furthermore, it was observed that the magnitude of the short-circuit current decreases progressively with increasing distance from the power source. This behavior is primarily due to the increase in line impedance along the distribution path, which naturally limits the fault current as it travels farther from the generation point. In summary, the farther the location of the fault from the generator, the lower the resulting short-circuit current, which highlights the critical role of impedance in fault current behavior across the distribution network.
ESP32-Based Real-Time Blood Typing Detection for Emergency and Rural Use Stephanus, Alphin; Tansiana Mbitu, Elisabeth; Gazali Suatkab, Syukri; Daus Salamoni, Thenny
International Journal of Science, Technology & Management Vol. 6 No. 4 (2025): July 2025
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v6i4.1340

Abstract

Accurate blood group identification is essential in emergency medical care, especially in rural or remote areas with limited access to laboratory facilities. This paper presents the design and development of a low-cost, real-time blood typing detection device focused on the ABO blood group system. The device utilizes an ESP32 microcontroller to process optical input signals based on agglutination reactions between blood samples and antisera. Measurement results are displayed directly on an LCD screen, providing immediate and easy-to-read feedback without the need for internet connectivity or external devices. The system is compact, portable, and user-friendly, making it ideal for use in field operations, mobile clinics, or basic healthcare units. Initial testing shows the device is capable of accurately determining blood types A, B, AB, and O in real-time, supporting rapid decision-making in critical situations.
Co-Authors Angel Merlyn Pattimahu Annisa Qurraisyn Qurraisyn Daus Salamoni, Thenny Gazali Suatkab, Syukri Gelvan Tuapetel Hamles Latupeirissa Jamlaay, Marselin Johanis Tupalessy Parera, Lory Marcus Pellu, Deny Ismail Persulessy, Sylvia Irene Sahusilawane, Ferdiaztha Rendy Salamoni, Thenny Daus Salamony, Theny Daus Siti Fatmalia Tuanany Stephanus, Alphin Suatkab, Syukri Gazali Tehuayo, Dirk Berly Thenny Daus Salamonit Wattimena, Sefnath J. Wattimena, Sefnath Johanis Widianto . Yesaya, Mey Chyntia