Repetitive tasks carried out by packaging workers of fertilizer producer company. These task led to some complains of pain and fatigue on upper body part of the workers based on Nordic Body Maps (NBM) questionnaire. This is because the workers work continuously for eight hours per shift and no recovery period. This study aims to determine risk level of musculoskeletal disorders and break time calculation. In this study, using Occupational Repetitive Actions (OCRA) index to reduce the risk level. The samples according to expert judgement criteria are three workers (packer clamper, packer tailor and loader). The improvement in this study is designing work methods with break time calculation. This improvement shows the risk reduction on the left hand of the packer clamper from 4,2 to 3,4 and the right hand from 9,9 to 8,2. Risk reduction on the left hand of the packer tailor from 3,44 to 2,2 and the right hand from 5,7 to 2,26 while the risk level on the left hand of loader from 1,4 to 0,87 and in the right hand from 2,17 to 1,18.
In the animal feed industry, hammer mill machinery plays an important role in the smashing of raw materials. By 2017, in an animal feed industry there has been a fire on the dust collector that almost burned down the hammer mill machine. In previous years also often occur sparks arising due to the knife rubbing against the metal that carried away with raw material. However, the fire will not increase if the hammer mill machine operators are competent in extinguishing the fire. The purpose of this study is to find out how much the effects of hammer mill machine fire fighting in terms of safety scenarios that exist either from human procedures or automatic safety procedures performed by existing safety devices. In this study, using a combination of calculations between Human Error Probability (HEP) values obtained from Human Reliability Assessment (HRA) calculations using SPAR-H method and reliability calculation of hammer mill machine components obtained from downtime data for four years, 2014 until 2017. The total probability of outcome fire controlled increases from 0.177940 to 0,6393 and the total probability of outcome fire uncontrolled decreases from 0,82206 to 0,36068.
⎯The utilization of the Crushing and Barge Loading Conveyor (BLC) systems is important in coal processing. A crushing system is required as a tool for the process of crushing coal into smaller sizes and then transferring it to the stockpile. While a BLC system is needed to transport coal from the stockpile to the barge. In general, the control and supervision systems for crushing and BLC systems are carried out separately by two operators. However, the distance between two operators causes a time lag information. In this research, we create a Supervisory Control and Data Acquisition (SCADA) system with the type of Multiple Programmable Logic Controller (PLC) on the Crushing and BLC systems using Profinet communication integrated by two PLCs with one Human Machine Interface (HMI) and WinCC. The system is equipped with real-time data, automatic control, and online surveillance with smartphones via the S7APP application. The error resulting from the reading of each component by the HMI and smartphone reaches 0%, while for automatic control, the system works very well, having a success rate of 100%.
Around 66% of power plants in Indonesia are still sourced from coal and oil. On the other hand, Indonesia is rich in renewable energy potential but still has minimal utilization. Furthermore, the voltage at power plants that are small and less stable is also often a nuisance. Thus, an innovative hybrid, solar and hydroelectric power plant with a PID (Proportional Integral Derivative) based voltage stabilizer was created. PID-based voltage stabilizer control is generated in the form of PWM (Pulse Width Modulation). The results obtained in this study are PID control can produce the lowest voltage of 12.78 V and the highest voltage of 13.96 V with a setpoint of 13.4 V. The power generated from solar, hydro, and hybrid power plants is 11.8 Watts, 9.4 Watts, and 14.85 Watts. As for Charging the Battery, an increase of 2.72 V was obtained in 24 hours. As for the storage side, the Battery can supply a 15 watt incandescent lamp for 8 hours 55 minutes while leaving 20% of the total capacity.
KRI Fatahillah merupakan kapal perang jenis perusak kapal berpeluru kendali milik TNI AL. Kapal tersebut yang dibuat oleh galangan kapal Wilton- Fijenoord, Schiedam, Belanda pada tahun 1979. KRI Fatahillah 361 bertugas sebagai armada pemukul dengan kemampuan melumpuhkan kan permukaan, kapal selam dan pesawat udara. Instalasi penerangan navigasi KRI Fatahillah menggunakan dua power supply sebagai sumber tegangan. Tegangan pertama yaitu tegangan AC 115 Volt yang dirubah menjadi tegangan DC 24 Volt menggunakan trafo step-down dan tegangan kedua adalah DC 24 Volt sebagai tegangan darurat apabila tegangan utama mengalami blackout/gangguan. Instalasi sistem pengendali penerangan navigasi mengalami kerusakan pada bebarapa komponen yaitu trafo, lampu navigasi, kabel, fuse dan fiting lampu sehingga dilakukan perbaikan dengan cara menggulung/melilit kembali trafo yang terbakar, mengganti lampu dan fuse yang putus, mengganti kabel dan fiting lampu yang rusak, cara mengatasi masalah/gangguan pada instalasi sistem pengendali penerangan navigasi KRI Fatahillah 361 dilakukan dengan menggunakan metode penyelesaian masalah, observasi/pengamatan dan eksperimen. Kata Kunci : Gangguan, Komponen, Lampu Navigasi, Sistem pengendali, Power Supply.
Sistem kelistrikan kapal merupakan salah satu sistem yang menunjang aktifitas kapal dalam memasok daya untuk peralatan kelistrikan. Sehingga diperlukan standarisasi untuk sistem kelistrikan kapal. Standarisasi yang digunakan adalah standarisasi dari Biro Klasifikasi Indonesia. Dilakukan standarisasi dengan maksud untuk mengetahui khususnya pada sistem kelistrikan kapal apakah kapal layak beroperasi. Pada standarisasi peralatan listrik dilakukan sertifikasi maupun uji coba terhadap safety device peralatan kelistrikan kapal. Metode yang digunakan adalah metode studi kasus. Tahap pertama dilakukan studi lapangan yaitu survey lokasi untuk menggali secara langsung mengenai informasi dilapangan. Tahap selanjutnya yaitu observasi awal yang dilakukanguna untuk memperoleh studi kasus. Berikutnya dilakukan pengumpulan data primer dan sekunder. Data primer berupa sertifikasi Main Switchboard, sertifikasi Emergency Switchboard , Megger test elektromotor dan Load test generator. Data sekunder berupa rule BKI volume 4 Rule for Electical Installation. Data yang dikumpulkan dibandingkan dengan standart dari rule BKI volume 4 yang berkaitan dengan objek yang di amati. Dari hasil analisa penulisan Tugas Akhir ini didapatkan hasil sertifikasi peralatan listrik pada kapal Fery 1200 GT 100 % memenuhi standart dari Biro Klasifikasi Indonesia (BKI) dan dinyatakan layak beroperasi. Kata Kunci : Sertifikasi Main Switchboard, sertifikasi Emergency Switchboard , Megger test elektromotor dan Load test generator
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.