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Electrician : Jurnal Rekayasa dan Teknologi Elektro
Published by Universitas Lampung
ISSN : -     EISSN : 25493442     DOI : https://doi.org/10.23960/elc
Core Subject : Engineering,
Control & Systems Engineering Electrical & Electronics Engineering Engineering
Focus and Scope Publication of scientific research results in the field of electrical engineering which covers: ~ Power system analysis ~ Electrical energy conversion ~ High voltage technology ~ Electronics ~ Control system ~ Telecommunication system ~ Computer and interfacing ~ Information engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 14 Documents
 1   2 
Search results for , issue "Vol. 3 No. 1 (2009)" : 14 Documents clear
Pengaturan Motor Induksi Meggunakan Chopper Pada Rotor Berbasis Komputer Haris, Abdul
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 3 No. 1 (2009)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v3n1.32

Abstract

Usually the speed control used the electronic instruments, for example it is based on a microcontroler. For easy controlling, microcontroller is connected to computer as a bridge between user and the motor that is to be controlled. The speed of induction motor for wound rotor type is adjustable by using the chopper that is connectedto its rotor circuit. With the use of the power transistor as a chopper, so switching can be manipulated and easy to control. The control instrument is made by using microcontroller that based on computer. The speed control used a chopper circuit results in the wider speed control depending on the duty cycle of the chopper. While by using the conventional external resistor just results in the speed control area that its condition depends on the variable resistors used.
Perancangan Robot Penjepit Barang Berbasis Mikrokontroler ATMega 8535 Harahap, Charles Ronald
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 3 No. 1 (2009)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v3n1.33

Abstract

Pengaturan Aliran Daya Reaktif Dengan Transformator Regulasi Jenis Pengatur Tegangan Pada Jaringan Sistem Tenaga Listrik Despa, Dikpride
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 3 No. 1 (2009)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v3n1.34

Abstract

Reactive power flow regulation is power system is required to improve voltage profile and reduce system losses. Reactive power flow regulation is done using correct tap setting on the regulating transformer. The study is conducted through literature survey and simulation using ETAP. The result shows that correct tap setting on the regulated bus, voltage increases up to theallowable limits 10 percents over nominal voltage and at the same time reduce system losses. Finally, tehe result also shows that about 77,07percents of total reactive power required by load can be met by the transformer.
Analisis Karakteristik Elektrik Zno Terdoping Cr2O3 Untuk Aplikasi Varistor Tegangan Rendah Sitorus, Henry B. H.; Asmi, Dwi; Sandaran, Saka
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 3 No. 1 (2009)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v3n1.35

Abstract

ZnO is one of the main ingredients of making varistor can be used as a protective device to protect electronic and electrical equipment from the dangers of impulse over voltage. Ability to function as a varistor protective because ZnO has a resistance that is not linear. When the system did not experience over voltage fault, current does not flow from the varistor, but when over voltage fault on system, current will flow from the fault line to the ground through varistor. The addition of dopant to ZnO expected to improve non-linierity of ZnO resitance. In this research used Cr2O3 as dopant. Varistor manufacturing using the dry pressing method at a pressure of 150 kg/cm2. Sintering process performed at a temperature of 900 degreeC with a time of detention for 2 hours. The size of the resulting varistor has a thickness 1.5 mm and 19 mm diameter. Characterization performed includes the analysis of crystal structures using X-ray diffraction, microstructure using MO and SEM, and electrical properties characterization volt-time using capacitive impulse voltage generator. Based on test results of x-ray diffraction and in accordance with PDF No. 38-1479 prove that the sample ZnCr5.0 contains Cr2O3 with ZnO compounds dominant. Microstructure obtained by SEM seems not so clear, it is because the process is not optimum preparation and etching is not performed on test samples. Pure ZnO Varistor can work cut given impulse voltage, whereas the varistor mixtures of ZnO-Cr2O3 can not work to cut the impulse voltage 900 V-1450 V provided, it is alleged to be caused sintering temperature given is not optimum and dopan provided is not sufficient to improve performance a varistor.

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