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All Journal SITEKIN: Jurnal Sains, Teknologi dan Industri Jurnal Informatika dan Teknik Elektro Terapan INTECOMS: Journal of Information Technology and Computer Science Journal of Applied Engineering and Technological Science (JAETS) INFOKUM Jurnal Scientia Journal of Electrical Engineering and Computer (JEECOM) Instal : Jurnal Komputer Jurnal Info Sains : Informatika dan Sains Jurnal Pengabdian Masyarakat Bestari (JPMB) Jurnal Nasional Teknologi Komputer Jurnal Media Computer Science Jurnal Komputer Teknologi Informasi Sistem Komputer (JUKTISI) Jurnal Multidisiplin Sahombu Prosiding Seminar Nasional Teknik UISU (SEMNASTEK) Adpebi International Journal of Multidisciplinary Sciences Power Elektronik : Jurnal Orang Elektro Journal Serambi Engineering (JSE) Journal of Engineering, Electrical and Informatics
Parlin Siagian
UNIVERSITAS PEMBANGUNAN PANCA BUDI
Religion Agriculture, Biological Sciences & Forestry Arts Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences Other

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Analysis of the Influence of Residential Electrical Installation Errors on Prepaid Kwh Meter Errors in the PT PLN (Persero) ULP Stabat Area Harfan Diansyah; Parlin Siagian; Muhammad Erpandi Dalimunthe
Journal of Engineering, Electrical and Informatics Vol. 5 No. 2 (2025): June: Journal of Engineering, Electrical and Informatics
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jeei.v5i2.4148

Abstract

There are several things that happen when customers use electricity with prepaid Kwh meters. One of the problems now is an error in the Kwh meter or commonly called Kwh tempering. This study uses an observation method by taking a sample of 2 houses that have tempering problems in their Kwh. The results of the study of the first house with 900 VA electricity power found a current leak of 0.3 A, and in the second house with 1300 VA electricity power found a grounding cable connected to the neutral cable which caused a limping load of 0.85 A.
Analysis of Transformer Dielectric Quality at the Kisaran Main Substation of PT. PLN (Persero) ULTG Kisaran Rizinski Khaliksi; Parlin Siagian; Zuraidah Tharo
Jurnal Media Computer Science Vol 5 No 2 (2026): April
Publisher : LPPJPHKI Universitas Dehasen Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37676/jmcs.v5i2.10989

Abstract

This study presents a comprehensive analysis of the dielectric quality of a 60 MVA power transformer at the Kisaran 150kV Substation, North Sumatra, Indonesia. The transformer, manufactured by PAUWELS TRAFO and operated since 2011, operates at an average load of 33% with an ONAN/ONAF cooling system. Dielectric testing yielded a breakdown voltage of 80.2 kV, a moisture content of 17.62 mg/kg, an acid number of 0.108 mgKOH/g, and dissipation factors of 0.173% (primary), 0.190% (secondary), and 0.243% (tertiary). The bushing dissipation factor ranged from 0.247% to 0.271%. The interfacial tension measured 26.8 mN/m with a flash point at 148°C. Insulation resistance testing showed values of 4.9 GΩ (primary), 3.41 GΩ (secondary), and 3.40 GΩ (tertiary) with polarization indices of 3.06, 1.48, and 1.47, respectively. Operating temperatures remained within acceptable limits at 63°C (peak oil) and 62°C (winding). Analysis based on IEC 60422:2013 and PLN standards indicated that the transformer was in good operational condition with all parameters within acceptable ranges, although the interface voltage was close to the warning threshold. This study provides valuable baseline data for predictive maintenance strategies and demonstrates the importance of integrated dielectric testing for transformer health assessment.
Electrical System Design for a Telecommunication Tower at Site Mdn302 Mabar Gudang, Medan City Wahyu Pranata; Dino Erivianto; Parlin Siagian
INFOKUM Vol. 14 No. 03 (2026): Infokum, May - June 2026
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/infokum.v14i03.3089

Abstract

This study discusses the analysis of the electrical system at the MDN302 Mabar Gudang Site, which is used to support the operation of telecommunications equipment. The electricity supply at the site comes from a three-phase PLN network with a voltage of 380/220 V, but the installed operational loads use a single-phase system (phase–neutral). The study was conducted through field surveys, electrical parameter measurements, and technical calculation analysis to evaluate the performance of the electrical distribution system. The analysis includes power calculations, system current, distribution cable voltage drop, MCB capacity selection, and evaluation of the grounding and lightning protection systems. Voltage drop calculations were performed using a single-phase system approach with copper conductors and international units (SI). The calculation results show that the voltage drop value on all distribution lines is below the maximum limit of 5% according to the 2011 PUIL standard. The grounding resistance value obtained of 0.5 Ω also indicates that the grounding system has met safety requirements. In addition to technical aspects, this study also presents a Bill of Quantities (BoQ) as part of the electrical system material planning. The selection of MCB capacity and relatively large cable sizes was carried out as a long-term planning strategy to anticipate future load increases. Based on the analysis results, the electrical system at Site MDN302 Mabar Gudang was declared safe, reliable, and feasible for operation.
Impact of Stator Resistance Unbalance on the Efficiency and Torque of Three-Phase Induction Motor Muhamad Vickry Almuhtadi Billah; Siti Anisah; Parlin Siagian
INFOKUM Vol. 14 No. 03 (2026): Infokum, May - June 2026
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/infokum.v14i03.3090

Abstract

Three-phase induction motors are key components in industrial power systems, but their performance is susceptible to internal disturbances such as stator resistance imbalance caused by aging, overheating, or manufacturing defects. This study aims to systematically analyze the impact of stator resistance imbalance on the efficiency and torque characteristics of squirrel cage rotor induction motors using equivalent circuit-based mathematical modeling. Unlike previous studies that used external resistors, this study modifies the stator resistance parameters directly in the model to represent more realistic internal degradation. Simulations were performed on a 3.73 kW, 400 V, 50 Hz motor with resistance imbalance variations from 0% to 20%. The results show that the imbalance causes uneven current distribution and an increase in stator copper losses of up to 5.94% at 20% conditions, although the percentage of current imbalance remains below 1%. As a result, the efficiency decreases linearly from 92.97% to 92.62%, while the mechanical torque experiences a small decrease from 95.88 Nm to 95.28 Nm. This phenomenon also has the potential to increase torque ripple and uneven heating. This study demonstrates that stator resistance imbalance, even small ones, has a significant impact on motor performance and lifespan, and therefore needs to be considered in predictive maintenance strategies and energy efficiency optimization.
Analysis of Ground Fault Relay Settings on 150 kV Short-Circuit Faults at the Paya Pasir Substation B. Siahaan, Alfi Santun; Dino Erivianto; Parlin Siagian
Bahasa Indonesia Vol 18 No 01 (2026): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v18i01.493

Abstract

Single line-to-ground faults are among the most frequently occurring disturbances in high-voltage transmission systems and are strongly influenced by the sensitivity settings of the Ground Fault Relay (GFR). This study aims to analyze the suitability of ground fault relay settings in response to short-circuit faults in the 150 kV transmission system at Paya Pasir Substation. The research method involves evaluating existing relay settings on feeder bays, bus couplers, and power transformers, then comparing them with calculation standards based on 7% of the smallest short-circuit capacity (CCC). To obtain optimal relay settings, power system simulations were conducted using ETAP version 19.0.1 by modeling the network in a single-line diagram and analyzing single line-to-ground faults. The results show that most existing GFR settings do not meet protection sensitivity standards, with 60% of feeder bay settings classified as unsuitable. After ETAP simulation and protection parameter adjustments, improved relay sensitivity and selectivity were achieved, ensuring proper protection coordination among feeders, busbars, and power transformers. Therefore, ETAP simulation is proven to be an effective tool for evaluating and optimizing ground fault relay settings in a 150 kV transmission system.
Repairing Electrical Power Imbalances on the MDP Panel for Operational Reliability at State Vocational School 1 Stabat Muhammad Ady Pratama; Haris Gunawan; Parlin Siagian
INFOKUM Vol. 14 No. 03 (2026): Infokum, May - June 2026
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/infokum.v14i03.3093

Abstract

Power imbalance in a three-phase system is a critical issue that can disrupt the operational reliability of equipment, particularly in installations such as SMK Negeri 1 Stabat. This problem was identified in the Main Distribution Panel (MDP) which showed an imbalance in the load between phases (R, S, and T), which caused an increase in the current flowing in the neutral conductor. Current measurements conducted over five days showed a high percentage of imbalance, especially during the day (peak operating hours), with the highest value reaching 26.24% on Tuesday afternoon, far exceeding the ideal limit (generally <10%). The impact of this imbalance is power losses, increased temperatures in cables and transformers, and potential equipment damage. To overcome this problem and improve the reliability of the system, three main improvement solutions were implemented: (1) Replacing the input cable from MDP to several SDPs from 4x16mm² to 3x50mm² + N to adjust the load, (2) Repairing the cable lugs in the SDP panels that were corroded or loose to eliminate voltage losses, and (3) Increasing the school's electrical power from 53 Kva (MCCB 80A) to 66 Kva (MCCB 100A). The implementation of this solution succeeded in reducing the trip frequency on the main MCCB and increasing the operational reliability of the electrical system as a whole.
Performance Study of OCR (Over Current Relay) and GFR (Ground Fault Relay) Relays as Protection In 20 Kv Cubicles in Selayang GH PT. PLN UP2D North Sumatra Apda Eriansyah; Parlin Siagian; Rahmaniar, Rahmaniar
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Power system protection is crucial for maintaining energy distribution reliability. This study aims to evaluate the performance of Over Current Relay (OCR) and Ground Fault Relay (GFR) as protection systems in 20 kV cubicles at Selayang Switching Station (GH) PT PLN UP2D North Sumatra. The research method used is descriptive quantitative with an engineering case study approach. Data were collected through field observations, short-circuit fault current calculations, and physical testing using the Omicron CMC 353 secondary current injection tool. The results show that the maximum short-circuit fault current of 14.4 kA is still below the circuit breaker's breaking capacity of 16 kA. The pick-up current settings on feeders SLY 05, SLY 06, and SLY 07 met the sensitivity criterion (1.2 x Imax), and the time coordination (grading margin) between protection devices was within the ideal range of 0.25 to 0.5 seconds. Validation through injection testing showed high accuracy with an average operating time deviation of less than 10% according to PLN standards. The conclusion of this study confirms that the protection system at GH Selayang operates efficiently, precisely, and reliably in securing network assets and ensuring the continuity of electricity supply.
Impact of Stator Resistance Unbalance on the Efficiency and Torque of Three-Phase Induction Motor Muhamad Vickry Almuhtadi Billah; Siti Anisah; Parlin Siagian
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Three-phase induction motors are the main components in industrial power systems; However, their performance is vulnerable to internal disturbances such as stator resistance imbalance caused by aging, overheating, or manufacturing defects. This study aims to regularly analyze the impact of stator resistance imbalance on the efficiency and torque characteristics of a squirrel-cage induction motor using mathematical modeling based on an equivalent circuit. Unlike previous studies that employed external resistors, this research directly modifies the stator resistance parameters in the model to represent more realistic internal degradation. Simulations were conducted on a 3.73 kW, 400 V, 50 Hz motor with stator resistance imbalance variations ranging from 0% to 20%. The results show that the imbalance causes uneven current distribution and an increase in stator copper losses of up to 5.94% at the 20% imbalance condition, although the current imbalance percentage remains below 1%. As a result, the efficiency decreases linearly from 92.97% to 92.62%, while the mechanical torque experiences a slight reduction from 95.88 Nm to 95.28 Nm. This phenomenon also has the potential to increase torque ripple and uneven heating. The study demonstrates that even small stator resistance imbalances have a significant impact on motor performance and lifespan, and therefore should be considered in predictive maintenance strategies and energy efficiency optimization.
Efficiency Analysis of A 3-Phase Induction Motor using a Variable Speed Drive as a Speed Controller at PT. Indonesia Asahan Aluminum Muchamad Affan; Parlin Siagian; Dino Erivianto
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This paper analyzes the efficiency performance of a 7.5 kW three-phase induction motor controlled by a Variable Speed ​​Drive (VSD) for industrial speed regulation applications. The motor is rated at 380 V, 50 Hz, four poles, with a nominal speed of 1440 rpm. A constant voltage-to-frequency (V/f) control strategy is implemented with operating frequencies varying from 30 Hz to 50 Hz. Simulation-based analysis is conducted to evaluate electrical input power, mechanical output power, rotational speed, torque, and efficiency under different operating conditions. The results show that the motor input power decreases from approximately 8.0 kW at 50 Hz to 4.0 kW at 30 Hz, indicating significant energy-saving potential during partial-speed operation. Motor efficiency increases with frequency, ranging from 80.0% at 30 Hz to a maximum of 88.8% at the rated frequency. The reduced efficiency at lower frequencies is mainly attributed to the dominance of constant losses such as core and mechanical losses. The study confirms that VSD-based speed control improves operational flexibility and enhances energy efficiency of three-phase induction motors, making it suitable for industrial applications with variable load and speed requirements.
Analysis of the Effect of Capacitor Bank Integration and Harmonic Filters on Improving Energy Efficiency and the Reliability of the Electrical System at Hotel Danau Toba Medan Andri F M Siahaan; Zuraidah Tharo; Parlin Siagian
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Hotel Danau Toba Internasional Medan consumes a large amount of electricity due to the use of inductive and non-linear loads, which can reduce power quality. This study aims to evaluate the existing power quality and assess the effect of installing capacitor banks and harmonic filters in improving the efficiency and reliability of the electrical system. The methods used in this study include direct measurements, analysis referring to the IEEE Std. 519-2014 standard, and simulations with ETAP software version 16.0.0. The measurement results show a low power factor of 0.759, with a voltage drop reaching 15.65 kV from a nominal voltage of 20 kV, and the highest voltage unbalance recorded at 2.64% on panel 1 during the weekend. Based on the simulation results, the installation of a capacitor bank with a capacity of 525.22 kVAR can improve the power factor to 0.972 and reduce the current from 2015.2 A to 1782.6 A. To prevent resonance caused by harmonics, a reactor detuned by 8% is used. This implementation has been proven to increase energy efficiency, maintain system stability, and generate operational cost savings of IDR 221,400,000 annually.
Co-Authors Abdul Razak Ahmad Ahmad Ansari Amini Ahmad Fauzan Akbar Wirayuda Alam, Hermansyah Alex Sumanijaya Saragih Amani Darma Tarigan Andri F M Siahaan Apda Eriansyah Ardiansyah, Luvan Aritonang, Yogi Syahputra Ariyanto Gultom B. Siahaan, Alfi Santun Bastanta Tarigan Beni Satria Benri Purba Bertauli Br Simorangkir Charles Simanullang Dalimunthe, M. Erpandi Dalimunthe, Muhammad Erpandi David Siringoringo Denny Syahputra Dicky Lesmana Dicky Lesmana Dwi Permata Sari Eko Toni Hagler Simamora Erpandi Dalimunte Fachrur Rizki Fadel Muhammad, Fadel Fahlevi, T. Shandy Putra Fahreza, Muhammad Fitria Anis Frasasti, Ridho Anggu hafit, ilhan Hamdani Hamdani Hamdani Harfan Diansyah Haris Gunawan Haris Gunawan Hermansyah Alam Hermansyah Alam Hermansyah Alam Ilham Hardiansyah Y. S Kholaful Ahmad Harahap M. Fadlan Maulana, Rifky Mhd Erpandi Dalimunthe Mhd Idris Muchamad Affan Muhamad Vickry Almuhtadi Billah Muhammad Ady Pratama Muhammad Erpandi Dalimunthe Muhammad Fahreza Muhammad Renaldy Nimas Deria Wijayanti Nugraha, Satria Pasaribu, Waldi Prabowo Putra, Randi Rian Rafles Prasuki Pasaribu Rahmaniar Rahmaniar Rahmaniar Rahmaniar, Rahmaniar Rianto Wijaksana Silalahi Ridho Anggu Frasasti Ridho Anggu Frasasti Ridho Anggu Frasasti Ridho, M. Riko Putra Ananta Tarigan Rizinski Khaliksi Saragih, Naya Sari Simatupang, Gidion Siregar, Bahtiar Sitepu, Bernike Patresia Siti Anisah Solly Aryza Syafruddin H.S. Tanjung, Munawar Sajali Tanjung, Munawir Sajali Tengku Mughayat Syah Falah Wahyu Pranata Wibowo, Pristisal Yoel Wesly Dirney Lumbantoruan Zuraidah Tharo