Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

GEMA TEKNOLOGI

gema_teknologi
Website

Published by Universitas Diponegoro

ISSN : 08520232 EISSN : 2656582X DOI : -

Core Subject : Science,

Computer Science & IT

Gema Teknologi Journal (pISSN : 0852-0232, eISSN : 2656-582X) is an open access journal published by Vocational School, Diponegoro University, Indonesia. Gema Teknologi publishes articles from various engineering disciplines (the results of original scientific research or new scientific studies of literature). Editor receives articles both in English and Indonesian. Gema Teknologi Journal is published 2 (two) times a year, on April and October.

Arjuna Subject : -

Articles 166 Documents

6 7 8 9 10

OPTIMASI PELAKSANAAN PENERTIBAN PEMAKAIAN TENAGA LISTRIK (P2TL) SEBAGAI UPAYA PENINGKATAN SAVING KWH DAN PENEKANAN SUSUT NON TEKNIS DI PT. PLN (PERSERO) RAYON SEMARANG SELATAN Novena Putri, Irene Ega; Subari, Arkhan
Gema Teknologi Vol 18, No 2 (2015): October 2014 - April 2015
Publisher : Vocational School Diponegoro University

Irene Ega Novena Putri, Arkhan Subari, in this paper explain that this study will describe the existing condition P2TL implementation in Rayon South Semarang, examine the root of the problem of lack of optimal implementation of P2TL, and describes efforts to optimizing the implementation in Rayon P2TL South Semarang. The method used is a combination of quantitative and qualitative. The approach used to establish the conditions of implementation P2TL is through observation by setting a good standard P2TL, examining implementation procedures and examined the results of the implementation P2TL P2TL in January-March and discussed the obstacles in its implementation. The approach used to discuss in detail P2TL performance in January-March was through discussion violations committed customers, the amount of saving kWh for three months, the effect of saving kWh in the percentage of shrinkage, and effort optimizing the performance of P2TL. Results of this research note that saving kWh obtained in January-March amounted to 48 599 kWh, or approximately 13% of the targeted savings through the implementation P2TL kWh, thus concluded that the performance P2TL not optimal. Effect of kWh saved is able to suppress shrinkage in January by 0.16% and in March by 0.5%. Efforts should be made in order to optimize the implementation of technically P2TL is through Early Detection of Violations. Efforts should be made in order to optimize the implementation of the non technical P2TL is through targeting of saving kWh monthly, fixing TO Rayon, a sweeping legalization customers, regeneration P2TL implementation team, and socialization prepaid electricity. Keywords: P2TL, shrinkage, saving kWh, TO.

POWER SUPPLY INVERTER DC-DC SEBAGAI SUPPLY AUDIO AMPLIFIER Wardani, Ilham Setiya; Manan, Saiful
Gema Teknologi Vol 18, No 4 (2016): October 2015 - April 2016
Publisher : Vocational School Diponegoro University

Ilham Setiya Wardani, Saiful Manan in this paper explain that Utilization of power electronics components in the process of conversion of electrical energy has been growing from year to year. for controlling power from one form to another is very important and the characteristics of the equipment of power electronics has allowed it. DC-DC converters can also be called a wave DC inverter capable of producing symmetrical widely used and applied in industry and everyday life.In the inverter power supply are made using half-bridge converter topology. Half-bridge converter topology has several advantages that are easy to create and output a lot easier in the controlling. The process of switching at the half bridge converter using mosfet IRFZ44N and executed using ICTL494.In the design of the tool, using the supply is 12 Volt DC that directly goes to IC TL494 and frequency output that is generated directly toward the driver mosfet with the type BC327 used to mesaklarkan mosfet by means of on / off alternately to supply the power transformer intiferit to raise the voltage to 26 volt AC that will be rectified by using fast diode recofery MUR1560 to rectify the AC into DC voltage with the output voltage of +/- 26 volts DC.Â Keywords: power supply, inverter, TL494ReferencesBarkhordarian, V. Power MOSFET Basics. International Rectifier: California. E-book :www.aosmd.com. Didownload pada april 2016. Pukul 21.15 WIB.Hermawan, H. Rancang Bangun Sistem Kendali High Frequency Induction Heating. Skripsi S1 Teknik Elektro. Jakarta: Universitas Indonesia.Malvino . 1995. Prinsip-prinsip Elektronika. Jakarta : Erlangga.Maruitula, Edison. 2011. Rancang Bangun Flyaback Regulator Untuk Mencatu Sistem Pensaklaran IGBT pada Invereter. Skripsi S1 Teknik Elektro .Depok : Unversitas Indonesia.Muis, Saludin. 2013. Perancangan Teori Dan Praktis Power Supply Jenis Switch Mode. Yogyakarta : Graha Ilmu.Rasyid, Muhammad H. 1999. Elektronika Daya. Jakarta : PT Prenhallindo.

PERENCANAAN KONSTRUKSI BETON SLIPWAY - 150 LWT Dharma, Budhi
Gema Teknologi Vol 16, No 2 (2011): October 2010 - April 2011
Publisher : Vocational School Diponegoro University

Budhi Dharma, in paper Construction Planning of Slipway - 150 LWTÂ Concrete explain that in shipyard planning major facility types shipyard slipway suitable transverse system was built in the open or closed.To ship with 150 tons LWT according to the register BKI got main dimension vessels = 34 meters LOA,30 meters LP, 6 meters B, the ship draft T = 2,2 meters, and empty vessel draft Tk = 1,18 meters and block coefficient = 0,68.Of the main dimension of the vessel were then long slipway, heavy lorries and heavy lorries transfer launchers after the total weight is obtained the dimensions of the placement of concrete beam rail and lorry.Keyword : Slip way and structure concrete

SIMULASI PELIMPAHAN BEBAN PMT OUTGOING PWI 06 SAAT TERJADI OVERLOAD SHEDDING PADA TRAFO INCOMING 03 GARDU INDUK PURWODADI DENGAN MONITORING VT SCADA BERBASIS ARDUINO MEGA 2560 Rizkifadhla, Reza; Winarno, Heru
Gema Teknologi Vol 20, No 3 (2019): April 2019 - October 2019
Publisher : Vocational School Diponegoro University

Reza Rizkifadhla, Heru Winarno, in this article explains that overload shedding in incoming transformer occurs due to an increase in load current that exceeds the capacity of the transformer. If overload shedding is not handled, it will cause damage to the transformer, and even cause incoming trip feeders and a very wide blackout effect. Relay overload shedding mounted on incoming feeders works to anticipate overload shedding by deliberately releasing outgoing feeders gradually to reduce the load. This study aims to provide a simulation of the conditions of incoming feeders during normal times, during overload shedding and handling of outgoing feeders deliberately released by carrying out load maneuvers to other feeders with different incoming transformers. Maneuvers are carried out to maintain the reliability of the continuity of electricity distribution. In this study one simulation tool was designed. The design of this tool uses a relay and Arduino Mega 2560 as a control center. Arduino Mega 2560 reads the current using the ZMCT 103C sensor. The simulation is based on the overload shedding event that has occurred in Purwodadi Substation. As for controlling switching equipment and monitoring current and voltage is done using HMI with VT Scada software. In the experiment, 3 incoming normal currents were 2.2 A with a load of 5 12 VAC 5W lamps. Simulated maneuvering error, the load on incoming 3 increased to 2.60 A. This situation is considered to have reached the condition of overload shedding, relay PMT C trip to reduce the load. Incoming 3 returns back to normal, namely 1.68 A. Loads on PMT C that are extinguished are maneuvered to PMT E or PMT F which have different incoming.

OTOMATISASI ALAT PENGEPAKAN PERMEN SKALA HOME INDUSTRI BERBASIS MIKROKONTROLER ATMEGA 8535 Arfianto, Dony Hardika; Subali, Subali
Gema Teknologi Vol 17, No 1 (2012): April 2012 - October 2012
Publisher : Vocational School Diponegoro University

Dony Hardika Arfianto, Subali, in paper candy automation packing at home industry use ATMEGA 8535 microcontroller explain that in this modernization era, almost all activity uses of automation, both in the industrial middle, upper and home industry. If the process of candy packing can be automated it will be very advantageous for industrial-scale home industry. This candy packaging automation systems using a microcontroller ATmega 8535. The tool consists of a sensor LDR as sensor packaging, the heater as a tool for plastics pressing, conveyor as a driver and microcontroller ATmega 8535 as the main controller. Microcontroller ATmega8535 is one of the artificial Atmel microcontroller that has many uses. Price microcontroller is relatively cheap nowadays, if viewed from its facilities. Keywords: packing, LDR sensor, heater, microcontroller ATmega8535

PENGARUH PANJANG SALURAN TRANSMISI TERHADAP TEGANGAN LEBIH TRANSIENT YANG DISEBABKAN KARENA PROSES ENERGIZED PADA SALURAN TRANSMISI 500 KV Yuniarto, Yuniarto
Gema Teknologi Vol 17, No 4 (2014): October 2013 - April 2014
Publisher : Vocational School Diponegoro University

Yuniarto, in this paper explain that the utility of high transmission line result in the transient over voltage in transmission-line will also increasingly higher, mainly for lightning and switching surge. Switching surge is a dominant factor to show up much transient over voltage in the transmission-line in the level of 230 kV or higher, if it is compared with lightning surge.Â Switching surge is caused by single energized process, the process itself to energize a transmission line in no load condition with energy power through switch closure operation. The research was aiming at observing the influence of transmission-line length to transient over voltage that occurred at the energized process in 500 kV transmission line Ungaran-Pedan, which used EMTP (Electromagnetic Transients Program) to simulate it.Â The result of simulation showed that the transient over voltage occurred along the transmission-line which caused the higher voltage increase, providing that the line is also longer. Key word : over voltage, Â transient, EMTP

SISTEM PENGENDALIAN SUHU DAN PEMANTAUAN KELEMBABAN BIJI KOPI PADA MESIN PENYANGRAI BERBASIS ARDUINO 2560 Permana, Anggi; Setiono, Iman
Gema Teknologi Vol 19, No 2 (2017): October 2016 - April 2017
Publisher : Vocational School Diponegoro University

Anggi Permana, Iman Setiono, in this paper explain that along with the development of modern times. Technological advancements were increasingly found in manufacturing products, everything was done to be easy and practical. These products are made with the aim of helping human work. However, not all manufacturing products are automated. Some products still work manually. Therefore, we are required to be able to innovate by changing the manual process with a more efficient method by using products that are automatic. One tool is the roasting machine for coffee beans. Currently on the market it is rare for automatic coffee roasters to be designed. Most coffee roasters are done manually, use hand mixers, and use wood stoves or gas stoves. This situation becomes less efficient where the roasting is still using the hands, causing it to ripen evenly and burn. Though to get the right coffee is from the roasting process. Roasting determines the color and variety of flavors of coffee to be consumed. The effect of temperature and time also affects the results of roasting, even when roasting here we monitor the thickness of coffee beans. to produce good roasting. The principle is to give the right amount of time and the right temperature so that coffee will not only have a fragrant aroma but also create the right taste. To solve the problem, in this article we made coffee bean roasters. This coffee bean roasting system is based on Arduino MEGA type 2560. The roasting process uses the mlx90614 sensor and DHT11 sensor to monitor the moisture of coffee beans that will be displayed on the 7-segment. The heating media used is using heat elements instead of stoves. This tool is able to roast as much as 400 grams of coffee. It is expected that the roasting machine of coffee beans will be more optimal

KOMPETENSI PROGRAM STUDI DIPLOMA TEKNIK PERKAPALAN DALAM INDUSTRI MARITIM INDONESIA Mohd Ridwan; Eko Yulianto
Gema Teknologi Vol 16, No 1 (2010): April 2010 - October 2010
Publisher : Vocational School Diponegoro University

Mohd Ridwan, Eko Yulianto, in paper competency of naval architecture diploma program on Indonesian maritime industry explain that Shipbuilding engineering professionals is part of the leading maritime industry is expected to become the motor of development of national maritime fleet in the implementation of cabotage (Impres No.5, 2005), this will reduce foreign exchange spending nearly 99 trillion rupiah per year due to the use of foreign fleets, and the creation of new jobs as a supporter of the maritime industry. So the presence of workers who have competence in the field of shipbuilding (ship building, naval architecture, marine engineering enginerring and maritime transportation) is urgently needed and their capability to compete with other countries that previously controlled the sea as a source of national income should be the Indonesian government's attention. Keywords: Professional shipbuilding techniques, competency

STUDI PERANCANGAN PROPULSI KAPAL PETI KEMAS 100 TEUS Utomo, Budi; Khristyson, Samuel Febriary
Gema Teknologi Vol 20, No 2 (2019): October 2018 - April 2019
Publisher : Vocational School Diponegoro University

Transportasi laut menjadi penghubung kebutuhan dan perekonomian antar pulau di Indonesia, daya angkut dibuat seoptimal mungkin untuk dapat menyuplai kebutuhan masyarakat. Kapal yang ditinjau adalah jenis kapal barang peti kemas. Perencanaan bentuk lambung kapal dipengaruhi oleh beberapa faktor diantaranya adalah dari segi kegunaan kapal yang akan dibangun. Dari perhitungan hambatan dapat diketahui berapa Trust Horse Power sehingga dapat digunakan untuk menghitung efisiensi propulsi kapal. Kapal harus memiliki propulsi untuk melawan seluruh hambatan yang mungkin terjadi pada lambung kapal. Dari hasil analisis kapal barang peti kemas dengan kapasitas 100 teus memiliki daya mesin sebesar 1530 HP dengan sistem penggerak ganda dengan peletakan kamar mesin berada di belakang kapal. Tipe baling-baling yang di rencanakan adalah fixed pitch propeller B - 4. 40Â , dengan bahan material bronze . Ukuran pitch daun baling-baling 1650 mm dengan diameter baling-baling sebesar 1850 mm.

PERBANDINGAN PENGARUH PENEMPATAN ARRESTER SEBELUM DAN SESUDAH FCO SEBAGAI PENGAMAN TRANSFORMATOR 3 PHASA TERHADAP GANGGUAN SURJA PETIR DI PENYULANG PANDEAN LAMPER 5 RAYON SEMARANG TIMUR Wardana, Azis Nurrochma; Subari, Arkhan
Gema Teknologi Vol 18, No 1 (2014): April 2014 - October 2014
Publisher : Vocational School Diponegoro University

Azis Nurrochma Wardana, Arkhan Subari, in paper comparison of the effect of placement arrester before and after FCO as safety of 3 phase transformator from interruption of lightning at Pandean Lamper 5 Feeder, East Semarang explain that problem of the studied is location of arrester at distribution which have is same function and target but owning location of different arrester. Location of arresterÂ relate to wiring of arrester with transformer and fuse Cut Out (FCO) owning target to give protection at transformer of over voltage. In the last location of this arrester require to study again about its efficacy of its at transformer. Efficacy of pr otection at such transformer is efficacy of passed to protection is transformer by minimizing over voltage that happened at the transformer so that equipments and transformer which its of him do not experience of damage. By considering factor influencing the level of voltage of surge and current of surge that happened at each system, like wiring of arrester, length of wire, apart arrester which is utilized in system location of arrester, steepness of wave come, speed creep waving surge, and Basic InsulationLevel (BIL) equipments, so that is in the final got one of location of correct arrester as 20 kV distribution transformer protection. Keywords: Arrester, Distribution Transformer, Fuse Cut Out, Lightning Surge

Page 8 of 17 | Total Record : 166

6 7 8 9 10

Filter by Year

2010 2022

Filter By Issues

All Issue Vol 21, No 4 (2022): October 2021 - April 2022 Vol 21, No 3 (2021): April 2021 - October 2021 Vol 21, No 2 (2021): October 2020 - April 2021 Vol 21, No 1 (2020): April 2020 - October 2020 Vol 20, No 4 (2020): October 2019 - April 2020 Vol 20, No 3 (2019): April 2019 - October 2019 Vol 20, No 2 (2019): October 2018 - April 2019 Vol 20, No 1 (2018): April 2018 - October 2018 Vol 19, No 4 (2018): October 2017 - April 2018 Vol 19, No 3 (2017): April 2017 - October 2017 Vol 19, No 2 (2017): October 2016 - April 2017 Vol 19, No 1 (2016): April 2016 - October 2016 Vol 18, No 4 (2016): October 2015 - April 2016 Vol 18, No 3 (2015): April 2015 - October 2015 Vol 18, No 2 (2015): October 2014 - April 2015 Vol 18, No 1 (2014): April 2014 - October 2014 Vol 17, No 4 (2014): October 2013 - April 2014 Vol 17, No 3 (2013): April 2013 -October 2013 Vol 17, No 2 (2013): October 2012 - April 2013 Vol 17, No 1 (2012): April 2012 - October 2012 Vol 16, No 4 (2012): October 2011 - April 2012 Vol 16, No 3 (2011): April 2011 - October 2011 Vol 16, No 2 (2011): October 2010 - April 2011 Vol 16, No 1 (2010): April 2010 - October 2010 More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kota semarang,

Jawa tengah

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name -

Contact Email -

Phone -

Journal Mail Official -

Editorial Address -

Location Kota semarang, Jawa tengah INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kota semarang,

Jawa tengah

INDONESIA