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All Journal Jurnal Teknik Pendas : Jurnah Ilmiah Pendidikan Dasar
Mahendra, Doni
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Arts Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Other

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Evaluasi Setting Rele Proteksi Untuk Mengurangi Busur Api Pada Switchgear Di Bekasap Area PT. Chevron Pacific Indonesia Mahendra, Doni; Arlenny, Arlenny; Situmeang, Usaha
JURNAL TEKNIK Vol. 12 No. 2 (2018)
Publisher : JURNAL TEKNIK UNILAK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/teknik.v12i2.1769

Abstract

Sistem proteksi tenaga listrik harus mampu bekerja sesuai dengan tujuan serta fungsi yang ditentukan terhadap jenis gangguan yang terjadi. Salah satu gangguan yang terjadi adalah arus hubung singkat (short circuit) yang diikuti pelepasan energi panas dalam bentuk busur (arc flash) yang dapat merusak peralatan. Besar energi busur api yang dihasilkan tergantung dari waktu kerja sistem pengaman akibat gangguan arus hubung singkat. Semakin cepat rele pengaman bekerja, maka semakin kecil pula busur api yang dihasilkan dan begitu pula sebaliknya. Evaluasi setting rele proteksi di switchgear adalah mengubah setting time dial pada OCR primary dan OCR secondary. Untuk OCR primary nilai setting time dial sebelum nya 2,6 s menjadi 1,08 s sedangkan untuk OCR secondary dengan time dial 2,4 s menjadi 1,02 s. Perubahan setting pada OCR ini dihasilkan waktu kerja rele proteksi yang lebih cepat yaitu sebesar 0.208 s. Dengan waktu kerja proteksi yang semakin cepat, nilai energi panas yang di hasilkan juga lebih kecil. Energi insiden yang di hasilkan adalah 2,59 cal/cm2 menjadi 1.48 cal/cm2.
PENGARUH LATIHAN JALAN CEPAT BERIRAMA TERHADAP DAYA TAHAN DAN KETEPATAN LANGKAH PADA PESERTA EKSTRAKURIKULER DRUMBAND DI SMK ASSUBANDIYAH Mahendra, Doni; Sobar; Debi Krisna Irawan; Rafdlal Saeful Bakhri
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 03 (2026): Volume 11 Nomor 03, September 2026 Now Available
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i03.63418

Abstract

The purpose of this study was to determine whether there is an "effect of rhythmic fast walking exercise on endurance and step accuracy among drumband extracurricular participants at SMK Assubandiyah." The research method used by the author was an experiment with a One Group Pretest-Posttest design. The research population consisted of members of the Drumband extracurricular activity at SMK Assubandiyah. The sampling technique used was purposive sampling. The instrument employed was the multi-stage fitness test (beep test) to measure endurance and step accuracy. Data processing was conducted using mean, standard deviation, normality test, homogeneity test, and hypothesis testing. Based on the results of data processing and analysis, it can be concluded that there is a significant effect of "rhythmic fast walking exercise on endurance and step accuracy among drumband extracurricular participants at SMK Assubandiyah." The data processing results are as follows: Based on the analysis of Table 4.2, the normality test yielded a pretest significance value of 0.959 and a posttest significance value of 0.999. Since both values are greater than 0.05, the data are declared normally distributed. The homogeneity test in Table 4.3 showed a significance value (sig) of 0.237, which is greater than 0.05, indicating that the data are homogeneous. Based on the t-test analysis in Table 4.4, the obtained significance value (sig) was 0.000, which is less than 0.05; therefore, H1 is accepted and H0 is rejected, with a pretest mean score of 58.67 and a posttest mean score of 86.17. The data for this study were obtained and analyzed using SPSS 26.
Co-Authors Arlenny Arlenny Bakhri, Rafdlal Saeful Debi Krisna Irawan Sobar Usaha Situmeang, Usaha