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Arif Ramdhan Achmad
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analysis of gas pressure decline SF6 in 70kV circuit breaker bay transformer 3 at Babakan substation Arif Ramdhan Achmad; Muhammad Soleh; Sugeng Suprijadi
Journal of Emerging Innovations in Engineering Vol. 1 No. 02 (2025): October 2025
Publisher : Pustaka Intelektual Sutajaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65664/jeie.v1i02.8

Abstract

This study analyzes the decrease in SF₆ gas pressure in the 70 kV circuit breaker Transformer Bay 3 at Babakan Substation, which affects the reliability of the power system. SF₆ gas is used as an insulating medium due to its high dielectric strength but is susceptible to micro-leakage, which degrades equipment performance. This research employs a qualitative approach with a case study strategy based on primary data obtained from field observations, interviews, and testing documentation before and after the replacement of the T-phase pole. Gas pressure monitoring was conducted using a FLIR Gas 306 camera and digital measuring instruments, with thematic analysis employed to identify causes and evaluate repair effectiveness. The results showed that a fine leak at the lower T-phase pole was the main cause of gas pressure reduction. After pole replacement, the rate of pressure drop decreased from 0.00459 MPa/day to 0.00016 MPa/day, indicating a 35.3% increase in insulation effectiveness and a 64.6% reduction in leakage rate. Operational feasibility tests met the SPLN 52-1:1983 standard, confirming that the circuit breaker is suitable for operation. I while applying condition-based maintenance (CBM) and infrared detection proved efficient in identifying SF₆ leakage and supporting predictive maintenance practices at substations.
Co-Authors muhammad soleh muhammad soleh Sugeng Suprijadi