PROTOTYPE PROTEKSI ARUS LEBIH MENGGUNAKAN CURRENT TRANSFORMER BERBASIS MIKROKONTROLLER ATMEGA32

Hadi Prayogo, 0915031085 (2014) PROTOTYPE PROTEKSI ARUS LEBIH MENGGUNAKAN CURRENT TRANSFORMER BERBASIS MIKROKONTROLLER ATMEGA32. Fakultas Teknik, Universitas lampung.

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Abstrak

Sistem proteksi pada peralatan tenaga listrik sangat diperlukan untuk menjaga kehandalan dan kualitas listrik, sistem proteksi yang baik mampu melokasilisir keadaan dari gangguan seperti kelebihan beban dan hubung singkat. Pengendalian dari sistem proteksi sendiri harus cepat dan sensitif dalam merespon gangguan, sehingga langsung memerintahkan sistem proteksi untuk bekerja. Dalam penelitian ini dibuat prototipe proteksi arus lebih terdiri dari komponen seperti Tranformator Arus, Mikrokontroller ATmega32, pengkondisi sinyal, lcd 2x16, ULN 2003, relay, dan komponen pendukung lainnya. Diperlukan pengkalibrasian system, supaya tidak terjadi kesalahan pada proses pengamanan saluran, kesalahan pembacaan sensor sebesar 0.01553% pada saat pengujian tranformator arus 1, pada saat pengujian tranformator arus 2 kesalahan pembacaan alat sebesar 0.019495% , sedangkan pada saat pengujian sensor tegangan kesalahan pembacaannya 0.001459%. Pada masing-masing Tranformator arus dibatasi arus maksimal 4 ampere. Proses yang menyebabkan pemutusan saluran terhadap beban, karena jumlah arus pemakaian beban telah melebihi dari batas maksimal arus yang ditetapkan dan juga akibat adanya hubung singkat. Apabila terjadi arus lebih dari batas maksimal arus yang ditentukan, maka sistem proteksi akan memutus saluran dan menghubungkan kembali apabila arus dibawah batas maksimal. Kata kunci : Tranformator Arus, Mikrokontroller ATmega32, ULN 2003 dan Relay. Protection systems in electric power equipment is needed to maintain reliability and power quality, The good protection system capable to alocate overload and short circuit. System control of the protection system must be fast and sensitive in responding of fault thus directly ordered protection system to work. In this research a prototype overcurrent protection consists of components such as transformers Flow, ATmega32 microcontroller, signal conditioning, lcd 2x16, ULN 2003, relays, and other supporting components. In this thesis required calibration system, so that won’t give error occurs in the process of securing the channel, the sensor reading error of 0.01553% when the current transformer testing 1, when the current transformer testing tool 2 reading errors by 0.019495% and then testing error voltage sensor reading is 0.001459%. For each of the current transformers is limitedmaximum current 4 amperes. The process that led to the termination of the channel to load, because the amount of current consumption of the load has exceeded the maximum limit specified flow and also due to short circuit. If there is more current than the maximum current limit isspecified, the protection system will be disconnected and reconnected when the channel below the current maximum limit. Key words : Current transformer, Microcontroller ATmega32, ULN 2003 and Relay.

Tipe Karya Ilmiah: Skripsi
Subyek: A General Works = Karya Karya Umum
Program Studi: Fakultas Teknik > Prodi Teknik Elektro
Depositing User: 077647 . Digilib
Date Deposited: 25 Aug 2014 06:18
Last Modified: 25 Aug 2014 06:18
URI: http://digilib.unila.ac.id/id/eprint/3103

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