Claim Missing Document
Check
Articles

Found 3 Documents
Search

EVALUATION OF THE PERFORMANCE OF A 3-PHASE INDUCTION MOTOR IN A COOLING TOWER SYSTEM AT PT. POLYCHEM INDONESIA TBK Qonita Auliani; Bagus Dwicahyono
TESLA: Jurnal Teknik Elektro Vol 27 No 2 (2025): TESLA : Jurnal Teknik Elektro
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/tesla.v27i2.35663

Abstract

This study aims to evaluate the performance of three-phase induction motors used in cooling tower systems at PT. Polychem Indonesia Tbk. Cooling towers play an important role in maintaining production stability in the chemical industry, where motor reliability is essential to ensure continuous water circulation. This study uses a quantitative approach through an online inspection method with the main parameters measured including voltage, current, and temperature. Field observations are supplemented with literature studies and interviews with experienced technicians to strengthen the analysis. The measurement results show that the motor operates within safe limits, with voltage maintained stable below 400 V, current not exceeding the nominal current of 345 A, and operating temperature remaining below 75°C. Error analysis shows a relatively small average error percentage, namely 0.02% for voltage, 0.05% for temperature, and 0.16% for current. These values are well below the ±5% tolerance limit according to the IEC 13B-23 standard, thus proving the accuracy of the measurements and the reliability of the motor's performance. These findings also indicate that a routine preventive maintenance program can minimize the risk of overvoltage, overcurrent, and overheating. Thus, it can be concluded that the GM-315 A three-phase induction motor is still operating reliably, efficiently, and safely in supporting the cooling tower system at PT. Polychem Indonesia Tbk Abstrak Penelitian ini bertujuan untuk mengevaluasi kinerja motor induksi 3 fasa yang digunakan pada sistem cooling tower di PT. Polychem Indonesia Tbk. Cooling tower berperan penting dalam menjaga kestabilan produksi pada industri kimia, di mana keandalan motor sangat dibutuhkan untuk memastikan sirkulasi air berjalan kontinu. Penelitian ini menggunakan pendekatan kuantitatif melui metode on-line inspection dengan parameter utama yang diukur meliputi tegangan, arus, dan suhu. Observasi lapangan dilengkapi dengan studi literatur serta wawancara dengan teknisi berpengalaman guna memperkuat analisis. Hasil pengukuran menunjukkan bahwa motor beroperasi dalam batas aman, dengan tegangan terjaga stabil di bawah 400 V, arus tidak melebihi arus nominal 345 A, dan suhu operasional tetap berada di bawah 75°C. analisis error menunjukkan nilai rata-rata persentase error yang relatif kecil, yaitu 0,02% untuk tegangan, 0,05% untuk suhu, dan 0,16% untuk arus. Nilai ini jauh di bawah batas toleransi ±5% sesuai standar IEC 13B-23, sehingga membuktikan tingkat akurasi pengukuran serta keandalan kinerja motor. Temuan ini juga mengindikasikan bahwa program pemeliharaan preventif yang dilakukan secara rutin mampu meminimalkan risiko terjadinya overvoltage, overcurrent, maupun overheating. Dengan demikian, motor induksi 3 fasa GM-315 A dapat disimpulkan masih bekerja dengan andal, efisien, dan aman dalam mendukung sistem cooling tower di PT. Polychem Indonesia Tbk
Pengembangan Learning Management System (LMS) Berbasis Website untuk Meningkatkan Hasil Belajar pada Mata Pelajaran Instalasi Motor Listrik di SMK Repaldi; Bagus Dwicahyono; Didik Aribowo
Jurnal Informatika dan Teknik Elektro Terapan Vol. 14 No. 3 (2026)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jitet.v14i3.10487

Abstract

Penelitian ini berfokus pada pengembangan Learning Management System (LMS) berbasis website sebagai media pembelajaran pada mata pelajaran Instalasi Motor Listrik di Sekolah Menengah Kejuruan (SMK). Selain menghasilkan media pembelajaran, penelitian ini juga bertujuan mengevaluasi tingkat kelayakan produk serta menganalisis pengaruh penggunaannya terhadap peningkatan hasil belajar peserta didik. Metode penelitian yang diterapkan adalah Research and Development (R&D) dengan menggunakan model ADDIE yang meliputi tahap Analysis, Design, Development, Implementation, dan Evaluation. Proses validasi melibatkan tiga ahli materi dan tiga ahli media, sedangkan uji implementasi dilakukan terhadap 26 peserta didik kelas XI Teknik Instalasi Tenaga Listrik di SMK Negeri 3 Kabupaten Tangerang. Data penelitian diperoleh melalui lembar validasi, pretest, dan posttest, kemudian dianalisis menggunakan analisis persentase dan Normalized Gain (N-Gain). Hasil validasi menunjukkan bahwa media memperoleh tingkat kelayakan sebesar 98,3% dari ahli materi dan 92% dari ahli media sehingga termasuk dalam kategori sangat layak. Penggunaan LMS juga memberikan peningkatan terhadap hasil belajar peserta didik yang ditunjukkan oleh kenaikan nilai rata-rata dari 62,7 pada pretest menjadi 81,7 pada posttest dengan nilai N-Gain sebesar 0,509 yang berada pada kategori sedang. Temuan tersebut menunjukkan bahwa LMS berbasis website yang dikembangkan layak diimplementasikan serta mampu mendukung peningkatan hasil belajar pada mata pelajaran Instalasi Motor Listrik.
Development of a Genially-Based Teaching Module Based on the Deep Learning Approach for Basic Vocational Subjects in the Mechatronics Engineering Program at SMKN 1 Cilegon Dede Fauzul Iman; Bagus Dwicahyono; Mohammad Fatkhurrokhman
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 No. 2, Juni 2026 Publish
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.57309

Abstract

Learning activities in the Basic Vocational Program subject at SMKN 1 Cilegon are still predominantly conducted through conventional instructional methods, accounting for 84.4% of classroom practices and limiting student’s active engagement. This study developed an interactive learning module using the Genially platform integrated with a deep learning approach for the topic of Active and Passive Electronic Components and evaluated its feasibility, practicality, and effectiveness through a Research and Development (R&D) method based on the ADDIE model, consisting of analysis, design, development, implementation, and evaluation stages. The participants were 34 tenth-grade students of Mechatronics Engineering at SMKN 1 Cilegon, with data collected through expert validation instruments, student response questionnaires, and pretest–posttest assessments. The results showed that the module was highly feasible, with validation scores of 71 from media experts (X ≥ 54) and 79 from material experts (X ≥ 60), while student responses indicated very high practicality with an average score of 84.5 (X ≥ 72). In terms of effectiveness, learning outcomes improved significantly, as shown by an increase in the average score from 51.6 on the pretest to 91.2 on the posttest, with an N-Gain value of 0.822 categorized as high, confirming that the developed module is feasible, practical, and effective in enhancing student learning outcomes and supporting student-centered learning in vocational education.