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Journal : Journal of Electrical Technology UMY

Radiosonde Transmitter Meisei iMS-100 Study as Observation on Air at Meteorology Station Klas I Depati Amir Pangkalpinang Arkan, Fardhan; Nababan, Demson
Journal of Electrical Technology UMY Vol 1, No 2 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.1212

Abstract

A radiosonde is one of the high technology tools and useful for aeronautical. In radiosonde have several sensors like air temperature, air pressure, air damp, vapor point, direction, and airspeed. Data from measure result will be received by supervising station in earth surface. Information will be collected by subarea air upstairs in Meteorology Station Klas I Depati Amir Pangkalpinang. An observation was done at 00.00 UTC (07.00 am) and at 12.00 UTC (07.00 pm). A transmitter in this observation is GPS Radiosonde iMS-100. The result shows that the radiosonde can work well at air pressure of 20 to 1000 hPa.
Comparative Analysis of the Use of LED and HPS Lights in PT. Bukit Asam Hasibi, Rahmat Adiprasetya Al; Jamal, Agus; Surahmat, Indar; Hardiyanto, Tio; Jusman, Yessi; Arkan, Fardhan
Journal of Electrical Technology UMY Vol 3, No 3 (2019): September
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.3358

Abstract

The lamp is the main construction facility in the company that serves as a support for the activities of the economic system and mobility in the company. An analysis of the difference between the use of LED lights with HPS lamps at PT. Bukit Asam Tbk. reference is used to recommend the use of appropriate (technical) lighting equipment for industrial areas and to obtain better cumulative costs and energy savings for the company in the future. In this study using the lamp replacement method with the same lumen level comparison. The goal is that later the level of lighting produced is the same for each lamp. From the results of this study it was found that the technical use of 70W, 150W, 250W and 400W HPS lamps has an efficacy level of 84 to 123 lm / W. Whereas the 80W, 200W, 300W, 450W LED lamps are 90 lm / W and the results of the cumulative value or the total cost of operating and maintenance costs for 15 years between HPS lamps versus the LED lights that occur is that in HPS lamps the total cost incurred amounting to 20,604,230,235 rupiahs while for LED lamps it is 27,787,386,324 rupiahs which can be seen that the use of more economical lighting is HPS lamps.
Estimation of Power Transformer Loading Based on Population Growth: A Case Study in Kulon Progo Regency Ardiyanto, Yudhi; Suripto, Slamet; Mujaahid, Faaris; Anshori, Rohman Try; Jusman, Yessi; Arkan, Fardhan
Journal of Electrical Technology UMY Vol 3, No 4 (2019): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.3465

Abstract

Along with technological advances, it is estimated that the gross regional domestic product (GRDP) of Kulon Progo Regency increases annually by 7.6%, and the population growth of Kulon Progo regency increases annually by 0.9%. However, after assuming with Muara Bungo Regency as a reference to GRDP growth and Population of Kulon Progo Regency due to the influence of the Establishment of New Yogyakarta International Airport (NYIA) in 2019, the population growth every year is 15.78%. While GRDP in 2018 until 2019 equals to 82.91% and next year equals to 7.6 %. Load forecasting the burden for the next ten years by using multiple linear regression affected by NYIA in 2019, the loading of the 150 kV Wates substation is only up to 2021 for the power transformer I of 24.83 MW and the power transformer II 55.40 MW. So it is estimated that for 2022, power transformer I and power transformer II of 150 kV Wates Substation are no longer able to serve the loading. Then, in 2021 a feeder shift and uprating power transformer I need to be conducted. In 2024 a power transformer III is needed. In that year the feed formation from power transformer I and power transformer II was changed to power transformer III.