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All Journal Journal of Degraded and Mining Lands Management Journal of Engineering and Technological Sciences ELECTRANS
Syarif Hidayat
School Of Electrical Engineering And Informatics, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Electrical & Electronics Engineering Engineering

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A Field Observation on Lightning Performance Improvement of Overhead Distribution Lines Zoro, Reynaldo; Mefiardhi, Ryan; Hidayat, Syarif; Mardiana, Redy
Journal of Engineering and Technological Sciences Vol 41, No 2 (2009)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (672.275 KB) | DOI: 10.5614/itbj.eng.sci.2009.41.2.3

Abstract

Two feeders of 20 kV overhead distribution lines which are located in a high lightning density area are chosen to be observed as a field study due to their  good  lightning  performance  after  improvement  of  lightning  protection system.  These  two  feeders  used  the  new  overhead  ground  wire  and  new  line arrester  equipped  with  lightning  counter  on  the  main  lines.  The  significant reduced  of  lines  outages  are  reported.  Study  was  carried  out  to  observe  these improvements  by  comparing  to  the  other  two  feeders  line  which  are  not improved and not equipped yet with the ground wire and line arrester. These two feeders  located  in  the  nearby  area.  Two  cameras  were  installed  to  record  the trajectory of the lightning strikes  on the improved lines. Lightning peak currents are  measured  using  magnetic  tape  measurement  system  installed  on  the grounding  lead  of  lightning  arrester.  Lightning  overvoltage  calculations  are carried out by using several scenarios based on observation results and historical lightning data derived from lightning detection network. Lightning overvoltages caused by indirect or direct strikes are analyzed to get the lightning performance of  the  lines.  The  best  scenario  was  chosen  and  performance  of  the  lines  were improved significantly by installing overhead ground wire and improvement of lightning arrester installation. 
A Field Observation on Lightning Performance Improvement of Overhead Distribution Lines Reynaldo Zoro; Ryan Mefiardhi; Syarif Hidayat; Redy Mardiana
Journal of Engineering and Technological Sciences Vol. 41 No. 2 (2009)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.eng.sci.2009.41.2.3

Abstract

Two feeders of 20 kV overhead distribution lines which are located in a high lightning density area are chosen to be observed as a field study due to their  good  lightning  performance  after  improvement  of  lightning  protection system.  These  two  feeders  used  the  new  overhead  ground  wire  and  new  line arrester  equipped  with  lightning  counter  on  the  main  lines.  The  significant reduced  of  lines  outages  are  reported.  Study  was  carried  out  to  observe  these improvements  by  comparing  to  the  other  two  feeders  line  which  are  not improved and not equipped yet with the ground wire and line arrester. These two feeders  located  in  the  nearby  area.  Two  cameras  were  installed  to  record  the trajectory of the lightning strikes  on the improved lines. Lightning peak currents are  measured  using  magnetic  tape  measurement  system  installed  on  the grounding  lead  of  lightning  arrester.  Lightning  overvoltage  calculations  are carried out by using several scenarios based on observation results and historical lightning data derived from lightning detection network. Lightning overvoltages caused by indirect or direct strikes are analyzed to get the lightning performance of  the  lines.  The  best  scenario  was  chosen  and  performance  of  the  lines  were improved significantly by installing overhead ground wire and improvement of lightning arrester installation. 
Lessons Learned from Rapid Development of CPAP Ventilator Vent-I during Covid-19 Pandemic in Indonesia Syarif Hidayat; Jam'ah Halid; Tatacipta Dirgantara; Mipi Ananta Kusuma; Hari Utomo; Reza Widianto Sudjud; Ike Sri Rejeki; Sandro Mihradi; Sri Raharno; Dadang Rukanta; Hari Tjahjono
Journal of Engineering and Technological Sciences Vol. 52 No. 5 (2020)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2020.52.5.11

Abstract

Here, lessons learned during the development of the CPAP ventilator 'Vent-I', aimed to help COVID-19 patients with breathing difficulties, are presented. Within only weeks, the Vent-I was developed, complying with functionality, safety and reliability requirements and passing the clinical trial. It was then distributed to hospitals all over Indonesia. Two billion rupiahs were raised through crowdfunding within one week. When the project was officially closed, more than one thousand Vent-I devices had been distributed and more than twelve and a half billion rupiahs had been raised. Currently, commercialization and mass production of the device have been started. From this project several lessons can be learned. First and foremost, the spirit of gotong royong"“ sincere collaboration within the community to help each other "“ is still firmly rooted within the people and the society of Indonesia. Noble values, i.e. sincerity, sensitivity and concern about the needs of the community, willingness to serve voluntarily and public trust, made the team dare to try and face failure. The spirit of social entrepreneurship, willingness to listen to the user and collaboration with the relevant authority can accelerate development process. The availability of knowledge and skills that constitute an innovation ecosystem in Bandung, supported by business, social institutions and government, was also a key success factor..
ANALISIS KEKUATAN MEKANIS DARI KABEL POWER BAWAH LAUT Sandy Bhawana Mulia; Syarif Hidayat
ELECTRANS Vol 13, No 2 (2014): Volume 13, Nomor 2, Tahun 2014
Publisher : Universitas Pendidikan Indonesia

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

Abstract

Kabel bawah laut (Submarine Cable) adalah salah satu jenis kabel yang digunakan untuk penyaluran tenaga listrik. Indonesia merupakan negara kepulauan sehingga sangat cocok jika menggunakan kabel bawah laut. Kabel bawah laut didesain untuk melindungi bagian dalam dari air, tekanan tinggi, arus bawah laut, gelombang, dan kekuatan alam lainnya yang bisa mempengaruhi keadaan kondisi dasar laut dan air yang ada diatasnya. Alasan yang paling umum pada kegagalan kabel bawah laut adalah kerusakan eksternal. Statistik kegagalan kabel bawah laut menunjukkan resiko 3 sampai 5 kali lebih tinggi dibandingkan resiko kegagalan internalnya. Metode yang akan digunakan untuk menguji kekuatan dari kabel power bawah laut ini adalah uji tarik (tensile strenght). Pengujian uji tarik digunakan untuk mengukur ketahanan suatu material terhadap gaya statis yang diberikan secara lambat. Sifat mekanis logam yang dapat diketahui setelah proses pengujian ini seperti kekuatan tarik, keuletan dan ketangguhan. Perhitungan penggelaran kabel bawah laut menggunakan slack positif dari kabel power dapat memberikan manfaat terutama untuk mengetahui kekuatan armor dari kabel tersebut. Dan hasilnya pun dapat tergambarkan setelah dianalisa bahwa pada kedalaman laut 150m-3000m merupakan jarak yang aman untuk proses penggelaran kabel power bawah laut karena armor kabel power mampu menahannya dan menunjukan performa terbaiknya selama proses tersebut.
Ecological assessment of different electrokinetic remediation strategies: a pilot scale study Yudith Vega Paramitadevi; Beata Ratnawati; Agus Jatnika Effendy; Syarif Hidayat; Mochamad Arief Budihardjo; Bimastyaji Surya Ramadan; Dimas Ardi Prasetya; Ivone Wulandari Budiharto
Journal of Degraded and Mining Lands Management Vol 10, No 2 (2023)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2023.102.4119

Abstract

The electrokinetic remediation method can function as a primary or secondary technology and can be applied in conjunction with other physical and biological methods, such as soil washing, phytoremediation, and bioremediation. Environmental impacts arising from the electrokinetic remediation process can be determined using life cycle assessment analysis (LCA) or other tools. This study compared the conventional electrokinetic remediation strategy with two hybrid strategies: electrokinetic-phytoremediation (EKR-Phyto) and electrokinetic-bioremediation (EKR-Bio). The environmental performance of the three strategies is then tested through LCA analysis. The database used was The Ecoinvent, and the freeware software used during the inventory stage was OpenLCA. The impact assessment stage was used in the Recipe I (2016) midpoints, Available Water Remaining (AWARE) midpoint, Intergovernmental Panel Climate Change (IPCC) midpoint (2003), UNEP Society of Environmental Toxicology (USEtox) midpoint, and cumulative energy demand midpoint. The significance of the analysis results was not obtained for the GWP parameter but for the freshwater eutrophication parameter. Among the three strategies, the EKR-Phyto strategy showed the highest significance in eutrophication but the lowest significance in land change. Substitution of chemical fertilizers into natural fertilizers in the EKR-Phyto strategy can be an opportunity for environmental sustainability. The highest impact for ecological analysis of the three strategies was EKR-Phyto in terms of GWP, the sum of primary energy, Acidification Potential (AP), and Photochemical Ozone Creation Potential (POCP).
Co-Authors Agus Jatnika Effendy Beata Ratnawati Dadang Rukanta Hari Tjahjono Hari Utomo Ike Sri Rejeki Ivone Wulandari Budiharto Jam'ah Halid Kusuma, Mipi Ananta Mihradi, Sandro Mochamad Arief Budihardjo Paramitadevi, Yudith Vega Prasetya, Dimas Ardi Raharno, Sri Ramadan, Bimastyaji Surya Redy Mardiana Redy Mardiana Reynaldo Zoro Reza Widianto Sudjud Ryan Mefiardhi Ryan Mefiardhi Sandy Bhawana Mulia Tatacipta Dirgantara, Tatacipta