Evaluasi Keselamatan Kerja Listrik Laboratorium Permesinan Kapal Universitas Maritim AMNI Semarang Dengan Metode Analitycal Network Process (ANP)

In the operation of electrical components in the ship engineering laboratory of the Maritime University of AMNI Semarang, various kinds of protection are needed. Errors in installing and operating electrical equipment can reduce protection. This protection aims to improve the safety of electrical work in ship engineering laboratories. And in the application of electrical work safety, it is necessary to evaluate based on the 2000 Electrical Installation General Requirements standard (PUILL 2000). The purpose of this study was to evaluate the use of the laboratory of the Maritime University of AMNI Semarang in the aspect of work safety. Based on the results of the evaluation, the criteria for electrical work safety are determined, namely: protection for safety, protection from overvoltages and currents, protection from thermal effects, and protection from fault currents. After the evaluation was carried out, alternatives were found to improve electrical safety: standard operating procedure (SOP), an inspection of cable installations, checking MCB panels and switches. The criteria and alternatives obtained then processed using the software super decision ver.2.10.0 with the Analytical Network Process (ANP) method so that the priority results of electrical safety improvements in the ship engineering laboratory of AMNI Maritime University Semarang are: repair of SOP 63.7%, cable installation 25.8%, MCB panel, and 10.5% switch.

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Electrical and Thermal Effects of Fault Currents in Aircraft Electrical Power Systems With Composite Aerostructures

IEEE Transactions on Transportation Electrification ◽

10.1109/tte.2018.2833838 ◽

2018 ◽

Vol 4 (3) ◽

pp. 660-670 ◽

Cited By ~ 5

Author(s):

Catherine E. Jones ◽

Patrick J. Norman ◽

Michal Sztykiel ◽

Rafael Pena Alzola ◽

Graeme M. Burt ◽

...

Keyword(s):

Power Systems ◽

Thermal Effects ◽

Electrical Power ◽

Electrical Power Systems ◽

Fault Currents

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Protective Devices Maintenance and the Potential Impact on Arc Flash Energy

10.5957/smc-2012-p15 ◽

2012 ◽

Author(s):

Dennis K. Neitzel

Keyword(s):

Electrical Equipment ◽

Electrical Safety ◽

Protective Devices ◽

Potential Impact ◽

Arc Flash ◽

Safety Considerations ◽

Insight Into

This paper provides insight into the electrical safety considerations, specifically as it relates to maintenance of electrical overcurrent protective devices, and the potential impact on the arc flash energy for shipboard electrical equipment and systems application. It provides valuable information for the electricians, technicians, and engineers who operate and maintain the electrical equipment.

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Assessment of Possessed Generic Green Skills for Green Jobs of Electrical Installation and Maintenance Work Graduates of Technical Colleges in Nigeria

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.b3559.129219 ◽

2019 ◽

Vol 9 (2) ◽

pp. 5601-5608

Keyword(s):

Technical College ◽

College Graduates ◽

Power Transmission ◽

Electrical Equipment ◽

Green Jobs ◽

Industrial Installation ◽

Simple Power ◽

Maintenance Work ◽

Power Tools ◽

Electrical Installation

The purpose of this study is to uncover employers’ assessment of possessed generic green skills for green jobs of electrical installation and maintenance work graduates of technical college in Nigeria. The study used 120 out of 140 employers of technical College Graduates in Adamawa State. The instrument used for the data collection was a questionnaire. Mean and standard deviation were used to analyze research data. The hypothesis was tested at 0.05 level of significance. The findings reveal that, in the rewinding of electrical machines modules of electrical installation and maintenance work, technical college graduates have adequate skills to work in the industry except in few areas like: conduct of preventive maintenance and testing faults in electrical filing machines’ winding, the ability to locate faults in electrical filing machines’ winding, carrying out insulation resistance test, interpreting drawings of electrical equipment where they showed averagely adequate and slightly adequate skills. Similarly, from the data obtained and analyzed, the result indicates that the graduates have adequate skills in industrial installation except in few areas like: Ability to handle power transmission equipment and components, maintain simple power tools, to test simple power tools, to interpret drawings of electrical equipment, to read symbols. Therefore, the researchers concluded that technical college graduates have adequate technical skills for green jobs and to work in the industries.

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Inrush Current Based on Fast Fourier Transform

INTEK Jurnal Penelitian ◽

10.31963/intek.v8i2.2940 ◽

2021 ◽

Vol 8 (2) ◽

pp. 114

Author(s):

Mochamad Ilham Zamzami ◽

Eka Prasetyono ◽

Dimas Okky Anggriawan ◽

Mike Yuliana

Keyword(s):

Fourier Transform ◽

Fast Fourier Transform ◽

System Modeling ◽

Harmonic Distortion ◽

Electrical Equipment ◽

Transient Condition ◽

Inrush Current ◽

Simulation Data ◽

Electrical Components ◽

Incandescent Lamps

Advances in technology have caused the use of electricity to increase rapidly. With advances in technology, this is followed by the use of increasingly efficient electrical components or equipment. This more efficient electrical equipment causes the impedance of the component to be smaller, causing a surge in current when it is turned on. This current surge, if not followed by appropriate safety precautions, will be damage other components. Each load has different waveform characteristics and current transient peaks. For this reason, it is necessary to analyze the transient condition of a load to overcome this. This paper will explain the characteristics of the inrush current of the load due to ignition. There are three loads used in this study, namely resistive, capacitive and inductive loads. Then the use of this load is simulated by giving different ignition angle values, namely 0, 60, and 90 degrees. The analysis used is the Fast Fourier Transform (FFT) method which is a derivative of the Discrete Fourier Transform. The inrush current spectrum in this simulation is simulated using Simulink MATLAB with switching system modeling using TRIAC. This inrush current simulation data collection uses a sampling frequency of 100 Khz and will be analyzed in the first of 5 cycles. For each load in this paper, the harmonic values for each ignition angle will be presented. The simulation results show that the inrush current is caused by the ignition angle value used and because of components that can deviate energy such as inductors and capacitors as well as components which at the time of starting have a low impedance value such as incandescent lamps. The simulation also shows that the use of switching components for setting the ignition angle causes an increase in the value of Total Harmonic Distortion (THD) but the peak current in the first cycle when the ignition angle is set decreases.

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Enhancing safety and reliability of electric power supply to consumers through safe electricity networks of up to 1 kV

Energy Engineering and Control Systems ◽

10.23939/jeecs2021.02.097 ◽

2021 ◽

Vol 7 (2) ◽

pp. 97-102

Author(s):

Yurii Shelekh ◽

◽

Myroslav Sabat ◽

Vladyslav Lysiak ◽

Lidija Parashchuk ◽

...

Keyword(s):

Power Supply ◽

Electric Energy ◽

Electrical Network ◽

Electrical Safety ◽

Technical Solution ◽

Additional Advantage ◽

Electric Power Supply ◽

Safety And Reliability ◽

Emergency Mode ◽

Electrical Installation

The study presents an electric network that allows both increasing the level of electrical safety and eliminating one-phase damage to the electrical network without switching off the consumer's electric energy. The application of the network does not require significant investments. The technical feasibility of implementing an electrical installation with voltage values in the emergency mode on the leading parts, which does not exceed the permissible values for normal mode, is demonstrated. An additional advantage of the proposed technical solution is the immutability of the voltage at the customer's outputs, which allows it to operate normally also in the emergency mode of the electrical installation.

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STATE AND PROBLEMS OF PRODUCTION AND HOUSEHOLD ELECTROTRAUMATISM IN UKRAINE

Municipal economy of cities ◽

10.33042/2522-1809-2021-4-164-234-239 ◽

2021 ◽

Vol 4 (164) ◽

pp. 234-239

Author(s):

Ya. Serikov ◽

O. Nikitchenko ◽

K. Serikova

Keyword(s):

Electric Current ◽

Urban Areas ◽

Service Sector ◽

Electrical Equipment ◽

Electrical Safety ◽

Economic Losses ◽

Power Cable ◽

Production Environment ◽

Electric Injuries ◽

Electrical Injuries

Technogenic development of society has caused widespread use in the system «man – production environment» and the system «man – household environment» of household electrical equipment, industrial electrical installations. Failure to comply with the regulated rules of electrical safety of electric current leads to electrical injuries. Designs of electrical installations, equipment, electrical protective measures are constantly being improved. But the level of electrical injuries in Ukraine and abroad tends to increase. This leads to social and economic losses as a result of economic costs in accidents, employee deaths, loss of working time and so on. The most objective indicator of injury is fatal. Thus, the level of fatal injuries at work per 1,000 workers in the developed world compared to the same rate in Ukraine in the UK is 10 times less, in Japan 7 times less, in the US 3 times less. This situation requires analysis and development of appropriate measures to reduce the level of electrical injuries. The analysis of statistical data revealed that the highest level of electrical injuries is observed in the following areas: - in agriculture; - service sector; - in public utilities; - in everyday life. At the same time, the tendency of its growth in the non-productive sphere and the household sector is expressed. So, at present in the general list of accidents from action of an electric current household electric injuries make the largest part – more than 46%. This is due to the insufficient level of education of the population on electrical safety, operation of electrical equipment in high-risk areas or in particularly dangerous by the degree of electric shock. At the same time, the level of domestic electrical injuries is higher in rural than in urban areas. It was also found that the greatest danger is posed by mobile and portable electrical installations, power tools and internal wiring. In addition, the housing of such electrical installations is often grounded through one of the cores of the power cable, which is unacceptable. The reasons for the high level of electrical injuries also include non-compliance with regulated organizational measures to ensure occupational safety and the so-called «human» factor. To improve the situation, it is necessary to intensify and increase the level of training of the population and employees on electrical safety, development and application of more modern switching electrical protection.

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On the Nonlinear Seismic Responses of Shock Absorber-Equipped Porcelain Electrical Components

Mathematical Problems in Engineering ◽

10.1155/2020/9026804 ◽

2020 ◽

Vol 2020 ◽

pp. 1-15

Author(s):

Zhubing Zhu ◽

Lingxin Zhang ◽

Yongfeng Cheng ◽

Hulun Guo ◽

Zhicheng Lu

Keyword(s):

Electrical Equipment ◽

Shaking Table ◽

Displacement Curve ◽

Seismic Responses ◽

Shock Absorption ◽

Seismic Effects ◽

Nonlinear Characteristics ◽

Shock Absorbers ◽

Shaking Table Testing ◽

Electrical Components

Porcelain electrical equipment is prone to brittle failure due to resonance under seismic effects. To improve its seismic resistance, some researchers have conducted research on shock absorption technology for porcelain electrical equipment. However, extant research fails to provide a detailed and systematic study of the effect of the nonlinear characteristics of these shock absorbers on the performance of equipment under seismic effects. This paper provides a theoretical analysis, verified by shaking table testing, of the performance of a 1000 kV pillar-type porcelain lightning arrester. The Bouc–Wen model is fitted to the force-displacement curve of hysteretic nonlinear metal shock absorbers, and a dynamic model of, and equations for, pillar-type porcelain electrical components are derived, taking into account their nonlinear characteristics. This reveals the influence of the nonlinear characteristics of shock absorbers on the nonlinear seismic response characteristics of these components. Our results indicate that the seismic responses of pillar-type porcelain components can be effectively suppressed by hysteretic nonlinear shock absorbers and that the greater the intensity of the seismic waves, the more obvious the efficiency of shock absorption. However, as the installation radius and yield force of the installed shock absorbers increase, their shock absorption efficiency gradually decreases.

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