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Ida Bagus Gde Widiantara
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Automotive Engineering Energy Engineering Mechanical Engineering

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Menekan Nilai SAIDI SAIFI Pada Penyulang Monkey Forest Dengan Pemasangan D-Star (Doble Isolator Tarik) Dan Perisai Binatang I Gst. Ketut Abasana; Adiaksa, I Made Anom; I Gde Nyoman Sangka; Ida Bagus Gde Widiantara
Journal of Applied Mechanical Engineering and Green Technology Vol. 4 No. 1 (2026): April
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/jametech.v4i1.26-32

Abstract

PT PLN (Persero) ULP Gianyar manages 29 feeders, one of which is the Monkey Forest feeder, distributing electricity to the Monkey Forest area, distributing electricity over an area of ​​7,168,10,232 m2 and a total cable length of 3.65 km supplied by the Payangan substation distributing electricity to 41 distribution substations in the Monkey Forest area with a total of 3,062 customers. Disturbances to the Monkey Forest feeder are dominated by animals because they are located in a tourist location which is a monkey habitat. The D-STAR innovation tool protects against interference caused by animals especially monkeys, in the construction of the stretcher pole at the meeting point/connection of the insulated aerial cable (SKUTM) with the SUTM conductor. Animal shields or what are usually called Cover Bushings are to protect distribution network components from interference caused by animals such as geckos that can easily reach electrical components. The effect of installing the D-STAR innovation tool (double tensile isolator) and animal shield on the SAIDI and SAIFI values ​​in the Monkey Forest feeder is very good, in 2023 the SAIDI value is 1.38 hours/customer/year and the SAIFI value is 1.31 times/customer/year where the value exceeds the target of PLN ULP Gianyar in 2024 after the installation of D-STAR and animal shield the SAIDI value is 0.01 hours/customer/year and the SAIFI value is 0.03 times/customer/year, the value has met the target of PLN ULP Gianyar and SPLN NO 68-2: 1986.
Analisis Pengaruh Aliran Fluida Pendingin Dan Waktu Pengelasan Spot Welding Kw14-1031 Terhadap Kekuatan Tarik Pelat Baja ST 40 Adiaksa, I Made Anom; I Nyoman Gede Suta Waisnawa; Ida Bagus Gde Widiantara; I Wayan Marlon Managi
Journal of Applied Mechanical Engineering and Green Technology Vol. 4 No. 1 (2026): April
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/jametech.v4i1.8-13

Abstract

Spot welding is greatly influenced by the cooling medium in terms of welding characteristics such as strength. The tensile strength of ST 40 steel plate welded joints is influenced by the cooling medium and welding time. Testing and data collection use experimental methods on spot welding machines and shear tests. Data collection uses quantitative methods while processing uses descriptive methods. The ASTM E8 standard is used in sample testing. The flow of coolant fluid in the spotwelding process significantly affects the HAZ diameter. Faster fluid flow increases heat transfer from the electrode to the coolant, keeping the electrode and weld material temperatures below 1,500 ºC, thereby reducing electrode wear and maintaining a stable weld nugget size at 5.00 mm. The lowest HAZ diameter was recorded at a flow rate of 5 liters/minute with a HAZ diameter of 8.30 mm, while the highest was at a flow rate of 2 liters/minute with a diameter of 10.43 mm. Too fast cooling or too short welding time can cause brittle weld joints and reduce tensile stress. Conversely, slower cooling with appropriate welding time produces optimal tensile strength while maintaining the structural integrity of the joint. Optimal results were found at a fluid flow rate of 2 liters/minute at 5.0 seconds with a tensile stress of 96.10 MPa, 3 liters/minute at 6.0 seconds with a tensile stress of 104.89 MPa, 4 liters/minute at 7.0 seconds with a tensile stress of 114.00 MPa and 5 liters/minute at 8.0 and 9.0 seconds with tensile stress of 116.72 MPa and 125.76 MPa.
Co-Authors I Gde Nyoman Sangka I Gst. Ketut Abasana I Made Anom Adiaksa I Nyoman Gede Suta Waisnawa I Wayan Marlon Managi