An analysis of the high voltage induction effect on the impressed current cathodic protection (ICCP) system on pipelines parallel toward high voltage power lines was employed in this research. Mitigation of high voltage effect throught human and environment is necessary to implemented. Direct current induction was used to increase the electrical potential of the gas pipeline, from Klumpang to sicanang area, Indonesia. During the mitigation process, the highest induction value was obtained 0.00574 KV which is previously was 0.01732 KV, and occurred at the limit of the allowable secure touch tension value of 0.015 KV. The data that acquire from the measurement of test point of ICCP underneath the transmission line revealed a comparison data between field measurements occurred of mitigation process. The direct current induction method is found to be safe for ICCP system and environment.
Dewasa ini mesin listrik yang sering digunakan pada dunia industri adalah motorinduksi, hal ini karena motor induksi memiliki beberapa keunggulan dibandingkan jenis motor lain, diantaranya memiliki efisiensi yang relatif tinggi, konstrusi yang sederhana dan kuat, serta mudah dan murah dalam perawatannya. Salah satu kelemahan dari motor induksi adalah mengatur kecepatan putaran motor. Kecepatan putaran motor induksi dapat diubah dengan cara mengubah frekuensi dengan menggunakan inverter. Penelitianini bertujuan mengetahui pengaruh perubahan frekuensi terhadap kecepatan putaran motor induksi 3 phasa menggunakan inverter. Hasil penelitian ini adalah perubahan frekuensi pada inverter dapat menyebabkan perubahan kecepatan putaran motor induksi 3 phasa. Perubahan frekuensi inverter dengan cara mengatur tegangan input inverter dengan mengubah-ubah tahanan (potensio meter ) pada inverter dapat merubah kecepatan motor induksi 3 phasa.Kunci : Motor Induksi 3 Phasa, Inverter (VFD), Frekuensi, Tegangan, Putaran.
Salah satu usaha pengolahan hasil perikanan berupa pembuatan terasi. Terasi(shrimp paste) merupakan salah satu produk awetan ikan-ikan kecil atau rebonyang telah diolah melalui proses pemeraman atau fermentasi, penggilingan ataupenumbukan dan penjemuran. Persoalan terasi lainnya adalah tempat untukpenjemuran dan tingkat kekeringan terasi. Dalam penelitian dirancanglah alatpengering terasi otomatis yang diharapkan dapat meningkatkan hasil produksiterasi oleh masyarakat. Hasil dari penelitianini diperoleh hasil prototype alatpengering terasi otomatis yang tepat guna sehingga dapat mengurangipenggunaan tenaga manusia dan dapat terlaksana walau cuaca tidakmemungkinkan.Kata kunci : Terasi, Pengeringan), Ardiuno Uno.
PT. PLN (Persero) ULP Langsa city is one part of UP 3 langsa, the LS-05 feeder in section two is the location for placing several office buildings. Continuity stable distribution of electrical energy is one of the most important aspects in the distribution system. Based on these problems, the writer was inspired to consuct research with the aim of testing the reliability of the feeders LS-05 and LL-4 which was installed with LBS manuver motorized at both ends of feeders. The LS-05 feeder with section method SAIFI value is 2.2739 times/ customers/ year and SAIDI Value is 8.41995 hours/ customers/ year. For LL-4 feeder witsh the same method SAIFI value is 2.28905 times/ customers/ year, then using RIA-Section technique combined method, LS-05 feeder have SAIFI value is 2,0219 times/ customers/ year, SAIDI value is 8,3082 hours/ customers/ year, LL-4 feeder have SAIFI value is 2.6574 times/ customers/ year and SAIDI 9.3008 hours/ customers/ year. This value indicates thet these two methods have succeeded in showing a reliability index is in accordance with SPLN due to the addition of LBS motorized.
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