1,720,966 research outputs found
Perancangan PLTS Untuk Sumber Daya Lampu Penerangan Jalan Desa Iringmulyo Metro
Get PDFThe increasing activity of the people at night makes the need for lighting sources also increase, especially in public places. One part that requires lighting is the Iringmulyo Metro village road. Roads are the main infrastructure that must be considered for their condition and use, if the road conditions are good for passage it will certainly reduce the level of accidents and crime, so village roads also need lighting. Public street lighting using solar energy is a cheap and economical alternative to use as a source of lighting electricity because it uses a free and unlimited source of energy from nature, namely solar energy. The Iringmulyo Metro village road lighting system uses a solar cell of 200 wp and a lamp load of 40 watts. When the weather is clear the battery can charge up to 720wh and can run a light load for up to 18 hours. If the solar panel is unable to receive light, the battery still has a power reserve of 240wh/6 hours. Lighting a solar street light using a 40 watt LED lamp produces an illumination of 4.58 lux. The power efficiency of the solar cell module panel is 14.5% determined by the tilt position of the solar cell panel and the intensity of sunlight. The higher the sunlight intensity, the higher the output efficiency of the solar cell modul
Analisis Susut Energi Pada Titik Sambung Ring Penyulang Sepat Menggunakan Thermovision Di PT PLN (Persero) Rayon Kota Metro
Get PDFIn electric energy dispatch process, interference were often found especially at medium voltage network. One of major problem from this processis the loss of electricsl energy which called losses. Losses caused be technical and non technical factors.One causes of the factor itself come from poor connecting point. This paper presents losses calculating with the result which caused by poot connecting point. Power loss count by long and cross sectional area at the connecting point. It also infected by the amount of load current flowing at that point. The biggest value of power loss occur at the connecting point which use joint sleeve. Otherwise, the smallest value of power loss occur at the connecting point which use compression connector (CCO)
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
ANALISIS DAMPAK OVERLOAD TRANSFORMATOR TERHADAP KUALITAS DAYA GARDU K622 PENYULANG PELANGI PT. PLN ( PERSERO ) ULP KARANG
Get PDFTransformer overload occurs in one of the distribution transformers in PT. PLN (Persero) ULP Karang,namely the K622 Distribution Transformer at the Rainbow Feeder with a load of 110.16% exceeding the standard set by SPLN, which is 80%. This study aims to find out how to overcome the Overload problem in the K622 distribution substation transformer on The Rainbow and get the size of the K622 distribution substation transformer load before and after the Uprating Transformer. From the results of uprating, the percentage of transformer loading value before uprating transformers was carried out by 110.16% and after uprating transformers by 26.38% so that it decreased by 83.78%. This means that the uprating transformer is one of the methods that can be used to overcome excess loads
Optimalisasi Load Break Switch Motorized Menggunakan Fungsi Sectionalizer Berbasis Scada pada Penyulang Bacan ULP Pulung Kencana
Get PDFThe medium voltage network of bacan feeders was an air line power network and had a very high potential to experience disruptions impacted on customer outages. The bacan feeder network was divided into sections uisng breaker equipment (Recloser/LSBM) in order to narrow down the area of blackout when a disturbance occurs. The work function of the breaker equipment was not yet optimal, so it can have an impact on the length of time the customer goes out when there was a network disturbance. From the simulation of the existing feeder conditions, the ENS (Energy Not Supplied) results were really high and the duration of the shutdown was every long so we optimize the breaker equipment (LBSM) by resetting the sectionalizer and telesignaling SCADA (Supervisory Control And Data Acquisition) and RTU (Remote Terminal Unit) on LBSM that has not been intergrated with SCADA. Based on the results of the analysis, evaluation and simulation, after the optimization of the SCADA-based sectionalizer function had been applied to the LBSM equipment, the ENS value and the feeder shutdown duration function due to the disturbance of the bacan feeder network could be significantly reduce
Pembuatan Aplikasi Penjualan Buku Berbasis Java Desktop dengan Netbeans
Get PDFKecil Bahagia Store is one of the bookstores that has difficulties when they want to do transaction processes, check the available book stock and make sales reports because of the frequent loss of transaction data, and available stock items this results in checking the stock of books and making reports requires sufficient time long. Another problem is that in the process of selling transactions, the manual process is used by recording each transaction in the book. This shop requires a software to improve the system. In the thesis designed a desktop application-based sales software facilitated information on available book stock, recording sales transactions with a computerized system, calculating total payments, and printing notes and reports needed. Based on the test results it can be concluded that the system can display the stock of goods, can optimize the sales transaction process, and can display and print sales reports and suppliers. The shop owner stated that the application can help in checking the stock of books that are still available and facilitates the sales transaction process. The shop owner also does not need to calculate the total payment manually because the application has calculated the total payment
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Analisis Efisiensi Trafo Toroidal dan Trafo Inti Besi Pada Proses Pengisian Baterai Berbasis LabView
Get PDFDetermining the type of transformer to be used in practical activities or used for charging batteries, an analysis test can be carried out by looking at the current and voltage on the transformer to be selected for use in the desired activity so that the most efficient transformer is obtained. This research was conducted to see the best and efficient transformer between the toroidal transformer and the iron transformer by using current analysis and input and output voltage. Then calculate the percentage of efficiency on each transformer so that the most efficient transformer is obtained between the Toroidal Transformer and the Iron Core Transformer. In this study, using Transformer Efficiency Analysis in Labview-Based Battery Charging Process. Labview itself is used as a user interface for measuring current and output voltage on a transformer with 24 Volt battery loading. So that we get the Output Current Trendline which later can be used to determine the efficiency of the transforme
Analisis Setting Arus Relai Differensial Pada Trafo II 30 MVA PT. PLN (Persero) Gardu Induk Sutami
Get PDFThe protection system is a very important part in an electric power installation. The purpose of the protection system is to secure equipment from abnormal conditions as early as possible so that the disturbance does not have time to cause greater damage to the equipment. The differential relay is the main safety relay on the transformer which functions to secure the transformer when an internal fault occurs in the transformer with the working principle of this relay comparing the secondary current value on the 150 kV primary voltage side with the 20 kV side secondary voltage. This study aims to determine the calculation of the appropriate differential relay current settings. The methodology in this study is to analyze the calculation, namely the calculation of the nominal current of the transformer to determine the CT ratio in the transformer, calculating the mismatch error and calculating the differential current, calculating the resistance current, calculating the slope of the differential relay, calculating the differential relay setting current, and calculating the disturbance in the transformer. From the research conducted, the results of the mathematical calculation of the value of the differential relay setting current for Transformer II 30 MVA Sutami Substation are 0.297 A. While the value of the installed setting is 0.3 A. From these results there is a very small difference so that this calculation is in accordance with the setting value. the current in the installed differential relay and the differential relay can work optimall
- …
