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All Journal Wahana : Tridarma Perguruan Tinggi BERNAS: Jurnal Pengabdian Kepada Masyarakat
Puji Slamet
Universitas 17 Agustus 1945 Surabaya, Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Dentistry Education Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Neuroscience Nursing Public Health Social Sciences Veterinary Other

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Assessment of Power System Equipment to Enhance the Power Quality at Dr. Saiful Anwar General Hospital Malang Reza Sarwo Widagdo; Puji Slamet; Aris Heri Andriawan; Balok Hariadi; Izzah Aula Wardah; Elvianto Dwi Hartono
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 2 (2024)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v5i2.8945

Abstract

Electrical conditions in the operations building and substation of the regional general hospital Dr. Saiful Anwarexperienced a power cut at optimum load, resulting in the power supply being solely obtained from the generator. The aim of the assessment carried out was to delve deeper into power quality, electrical performance, and other supporting equipment to maximize service to patients based on the assessment findings. The assessment stages utilized were the initial assessment stage and the detailed assessment stage. The analysis stages were conducted under steady-state load conditions. The assessment process involved field measurements, observations, and interviews with technical staff at the general hospital Dr. Saiful Anwar. Field measurements utilized Ammeters, Voltmeters, and Harmonic Analyzers to ascertain voltage imbalances, current imbalances, and harmonic content in SDP panels on each floor of the operations building, as well as to evaluate UPS components as backup power and stabilizers for electrical equipment. The results of observations and direct measurements in the field revealed several issues, including a current harmonic content of up to 50% on the 6th floor of the operations building (OK6) and in the Linac room, along with various other findings related to voltage and current imbalances in the secondary substation and certain components. The UPS, alike to the battery and filter capacitor inside, requires replacement. Additionally, regarding the grounding value, which currently stands at 3 Ohms, it is imperative to incorporate a parallel grounding system to bring the value below 1 Ohm to mitigate the risk of leakage current occurrences.
Performance Analysis of SF6 Circuit Breakers: Case Study of Rungkut 150 kV Main Substation Reza Sarwo Widagdo; Puji Slamet; Fernanda Eka Saputra
Wahana Vol 76 No 1 (2024): Wahana Tridarma Perguruan Tinggi
Publisher : LPPM Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/wahana.v76i1.8487

Abstract

Electrical energy transmission plays an important role as a means of distributing electrical energy from generation to distribution and consumers. During the process of distributing electrical energy, disturbances such as short circuits often occur. Therefore, there needs to be safeguards so that the distribution process runs well. One of the safety equipment in the main substation is the circuit breaker. Circuit breaker is a mechanical switch or switching equipment that can close, transmit or disconnect the load current under normal conditions or under abnormal conditions such as a short circuit. Problems with circuit breaker can be detrimental and disrupt the operation of the electric power system. If the circuit breaker does not work properly when a disturbance occurs, the disturbance can damage other devices and cause instability in the distribution of electrical power. Therefore, regular testing and maintenance must be carried out to ensure the circuit breaker is suitable for operation. The testing stages include SF6 pressure, insulation resistance, contact resistance, and circuit breaker contact simultaneity. The test results show SF6 pressure with a value above the circuit breaker nameplate, insulation resistance with a value above 150 MΩ, contact resistance with a standard value below 50 µΩ, and contact simultaneity testing is carried out by calculating the delta time when close and open on each phase in below the value of 10 ms. In accordance with the results of SF6 gas pressure testing, insulation resistance, contact resistance and circuit breaker synchronization at the 150 KV Rungkut Bay Line Main Substation, Surabaya Selatan, it is in operational condition.
Coordination Analysis of Overcurrent Relays (OCR) and Directional Ground Relays (DGR) for Transformer Protection at Segoromadu Substation, Gresik Puji Slamet; Reza Sarwo Widagdo; Aris Heri Andriawan; Muhammad Al Ahyudi
Wahana Vol 76 No 2 (2024): Wahana Tridarma Perguruan Tinggi
Publisher : LPPM Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/wahana.v76i2.9805

Abstract

Transformers are vital components in the distribution of electrical energy that are susceptible to overcurrent and short circuit disturbances, especially in substations. In this study, an analysis of the coordination of Over Current Relay (OCR) and Directional Ground Relay (DGR) was conducted to protect transformers in the Segoromadu Substation, Gresik. This analysis aims to determine the optimal settings of OCR and DGR, as well as to test the reliability of protection rather than safety equipment. Measurements were made by calculating the short circuit current of three phases, two phases, and one phase to ground, as well as the relay time settings. The simulation results show that the right settings on OCR and DGR can improve the reliability and safety of the substation protection system in maintaining a stable energy supply. These findings provide an important contribution in improving the performance of the protection system and can be a reference for the development of protection systems in other substations.
Analysis of the Insulation Quality of 1000 kVA Distribution Transformer Oil Due to Aging at PT. Bambang Djaja Surabaya Reza Sarwo Widagdo; Puji Slamet; Aris Heri Andriawan; Bima Bayu Santoso
Wahana Vol 77 No 1 (2025): Wahana Tridarma Perguruan Tinggi
Publisher : LPPM Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/wahana.v77i1.10008

Abstract

The reliability of transformer insulation is a crucial factor in preventing damage that can lead to fatal accidents and serious disruptions in electrical systems. Aging insulation can cause performance degradation in transformers, necessitating a comprehensive evaluation to detect potential damage at an early stage. This research aims to evaluate the condition of transformer insulation using several testing methods, namely Breakdown Voltage (BDV) and Dissolved Gas Analysis (DGA). Among these methods, DGA is the main focus due to its ability to detect internal disturbances early, such as heat release, arcing, and overheating. Dissolved gas analysis in insulating oil provides critical information to detect anomalies, allowing preventive measures to be taken before the damage becomes more severe. In this study, testing data from both BDV and DGA methods were obtained through experiments and observations on transformers that have been in operation for a certain period. The obtained data were thoroughly analyzed and compared with international standards, such as IEEE and IEC, to identify potential failures, such as insulation degradation, overheating, or abnormal energy release. The analysis results show that combining several testing methods, particularly DGA, can provide accurate results in detecting potential damage at an early stage. This research makes an important contribution to transformer management, especially in the implementation of predictive maintenance, to enhance the safety, reliability, and operational efficiency of transformers.
Co-Authors Aris Heri Andriawan Balok Hariadi Bima Bayu Santoso Fernanda Eka Saputra Hartono, Elvianto Dwi Izzah Aula Wardah Muhammad Al Ahyudi Reza Sarwo Widagdo