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All Journal Indonesian Journal of Engineering and Technology (INAJET)
Baihaqi, Mochamad Faris
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Mechanical Engineering

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Technical Analysis of Lightning Arrester Replacement to Improve Customer's Power Grid Reliability Zen, Hafidz Nindhom; Ibrohim; Baihaqi, Mochamad Faris
Indonesian Journal of Engineering and Technology (INAJET) Vol. 8 No. 1 (2025): September 2025
Publisher : Fakultas Teknik Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajet.v8n1.p33-40

Abstract

The reliability of the power distribution network in the tropics is particularly vulnerable to thunderstorm disturbances, which can cause asset damage and service interruptions. Lightning arrester (LA) as a primary protection component experiences performance degradation over time due to environmental factors, which has the potential to cause protection failure to thermal runaway. This study aims to conduct a technical analysis of the urgency of replacing existing LA units through a quantitative evaluation of isolation prisoners and a comparison of technical specifications with modern LA. The research methodology refers to the standard testing of insulation resistance with high DC voltage (2.5 kV - 5 kV), where values below the critical threshold of 1 Giga Ohm (GΩ) are identified as indicators of insulation failure after corrective cleaning measures are ruled out. The researchers analyzed that the value below the standard indicated a significant risk of leakage current that could trigger catastrophic failure of the Metal Oxide Varistor (MOV) block. The results of this analysis are expected to provide a strong technical justification for predictive maintenance policies, in order to improve surge protection capabilities, reduce the rate of disturbances, and ultimately strengthen the reliability of the electrical system comprehensively.
IMPROVED POWER GRID STABILITY WITH REGULAR MAINTENANCE OF MEDIUM-VOLTAGE TRANSFORMER CONNECTIONS Nisa', Silvi Nur Rakhman; Rohman, Miftahur; Baihaqi, Mochamad Faris
Indonesian Journal of Engineering and Technology (INAJET) Vol. 8 No. 1 (2025): September 2025
Publisher : Fakultas Teknik Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajet.v8n1.p41-49

Abstract

The power grid is a vital infrastructure that ensures the distribution of energy from the plant to the consumer. One of the important components in this network is the transformer, which regulates the voltage level as needed. In medium-voltage networks, transformer connections play a crucial role in maintaining system stability. Unmaintained connection conditions can cause disturbances in the form of decreased voltage quality, blackouts, and equipment damage. Unfortunately, connection maintenance is often done reactively, only when a fault occurs. This study aims to analyze the impact of routine maintenance of transformer connections on the stability of the power grid at PT PLN (Persero) UP3 South Surabaya – ULP Ngagel. The methods used include field observation, documentation of maintenance activities, and analysis of disturbance data before and after maintenance. The results of the study show that routine maintenance is able to reduce the frequency of connection failures, improve voltage stability, and extend the life of network components.
Co-Authors Ibrohim Nisa', Silvi Nur Rakhman Raden Mohamad Herdian Bhakti Zen, Hafidz Nindhom