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Hamdani Hamdani
Universitas Pembangunan Panca Budi, Medan, North Sumatera, Indonesia
Computer Science & IT Education Mathematics

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Analysis Efficiency Of 3 Phase AC Motor Use A Centrifugal Pump Drive On The Water Tower Of PDAM Tirtanadi, North Sumatra Kukuh Pambudi; Amani Darma Tarigan; Hamdani Hamdani
Jurnal Scientia Vol. 13 No. 02 (2024): Education and Sosial science, March - May 2024
Publisher : Sean Institute

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Abstract

This paper described an examines the efficiency of a 3-phase alternating current (AC) motor utilized to power a centrifugal pump at the water tower operated by PDAM Tirtanadi in North Sumatra. The primary objective is to assess the performance and energy efficiency of the motor-pump system, which is critical for ensuring optimal water supply management and minimizing operational costs. The research involves detailed data collection on the electrical consumption and output performance of the 3-phase AC motor during its operation. Parameters such as voltage, current, power factor, and load conditions are measured and analyzed. The efficiency of the motor is evaluated based on its ability to convert electrical energy into mechanical energy to drive the centrifugal pump effectively. Findings from this study reveal key insights into the operational efficiency of the 3-phase AC motor under varying load conditions. The analysis indicates the factors that influence motor efficiency, including mechanical losses, electrical losses, and the alignment of the motor with the pump's operational requirements. The study concludes with recommendations for optimizing motor efficiency, which include regular maintenance schedules, appropriate motor sizing, and potential upgrades to more energy-efficient motor models. Implementing these recommendations could lead to significant energy savings and improved performance of the water supply system managed by PDAM Tirtanadi. Overall, this research highlights the importance of continuous monitoring and evaluation of motor-driven pump systems in water supply infrastructure to achieve sustainable and cost-effective operations.
Analysis of the Effect of Load Equalization On Neutral Current at the TP0067 Distribution Substation of PT PLN (Persero) ULP Tanjung Pandan Bella Rosmaida S; Hamdani Hamdani; Siti Anisah
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

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Transformer load balancing is a mandatory maintenance activity that is regularly conducted to ensure the optimal performance of distribution systems. This activity serves as an essential effort to minimize neutral current, which contributes to power losses resulting from unbalanced loading conditions in distribution transformers. The load balancing process was carried out at Distribution Substation TP0067, with a capacity of 100 kVA, located within the operational area of ​​PT PLN (Persero) ULP Tanjung Pandan. The procedure commenced with load measurements on each feeder and phase, followed by detailed calculations of the phase load distribution. Based on the analysis results, the phases requiring load transfer to achieve balance were identified. Following the implementation of the load redistribution plan, it is expected that the neutral current will be significantly reduced, thereby reducing power losses and enhancing the overall efficiency and reliability of the distribution system.
Analysis of KBL 02 Feeder Protection Coordination to Improve Reliability at PT PLN (Persero) Djty ULP Purwokerto City Nia Rohchani; Hamdani Hamdani; Reza Juliangga
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

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In 2017, the KBL02 feeder was recorded as having a low reliability level due to the high frequency of PMT and recloser tripping faults. Based on the fault data evaluation, most fault locations were downstream of the recloser, but the protection system actually caused the outgoing PMT to operate first. This condition resulted in a wider outage area and reduced electricity supply to customers, resulting in an increase in the SAIDI and SAIFI reliability index values ​​at PT PLN (Persero) Purwokerto City ULP. The main problem was caused by inconsistencies in protection coordination between the outgoing PMT and the KBL02.067 recloser, which was influenced by recloser placement that was not aligned with the OCR and GFR settings. This study aims to evaluate protection coordination and determine recloser relocation based on fault current calculations and protection settings. The results are expected to improve protection system selectivity and enhance power distribution reliability at the KBL02 feeder.
Co-Authors Amani Darma Tarigan Bella Rosmaida S Kukuh Pambudi Nia Rohchani Reza Juliangga Siti Anisah