Mohd Wafiuddin Yahya
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Preferred name
Mohd Wafiuddin Yahya
Official Name
Mohd Wafiuddin , Yahya
Alternative Name
Yahya, M. W.
Yahya, Mohd Wafiuddin
Main Affiliation
Scopus Author ID
57202610067
Researcher ID
HZG-9288-2023

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  • Publication
    Development of copper busbar by silver plating under non-linear load operation using finite element method (FEM)
    (AIP Publishing, 2023-04)
    Muhammad Hafiz Ab Aziz
    ;
    Muhammad Mokhzaini Azizan
    ;
    Zaliman Sauli
    ;
    Mohd Wafiuddin Yahya
    Generally, busbars are used in electrical transmission and distribution power. The presence of harmonic current in the busbar will generate more heat to the system. The generation of heat will be increasing power losses at the busbar and reduced their conductivity. A three-dimensional (3D) Finite Element Method (FEM) by COMSOL Multiphysics software was used in this research to analyze the heat distribution, average temperature, and power losses of copper busbar with 0.5 mm silver plating on their surface. The dimension of 30 mm × 4 mm × 500 mm copper busbar was utilized based on their suitable current carrying capacity from the measured location. The current source starts from 419 A and varies from 0% until 50% of Total Harmonic Distortion (THD) with an interval of 5%. The findings show improvement condition of copper busbar after silver plated on their surface. The bare copper busbar only meets the requirement range condition of BS159:1992 until the existence of 15% Total Harmonic Distortion of current (THDi) component while silver-plated copper complies until the maximum value of THDi which is 50%.
  • Publication
    Temperature analysis of single busbar with variation of total harmonic distortion in current
    (Semarak Ilmu Publishing, 2025-11)
    Mohd Wafiuddin Yahya
    ;
    Baharuddin Ismail
    ;
    Afifah Shuhada Rosmi
    ;
    Muhammad Mokhzaini Azizan
    ;
    Chanuri Charin
    ;
    Muhamad Hafiz Ab Aziz
    ;
    Sharulnizam Mohd Mukhtar
    ;
    Yazhar Yatim
    Typically, busbars are used to transmit and distribute currents in a bus duct system. The alarming use of nonlinear loads in the industrial sector or at residentials, such as arc welding, computers, ballast lighting, variable speed drives, and so on, has resulted in the generation of harmonics in current distortion, which are uncontrolled and thus increase heat generation within the system. The research conducted in this paper focuses on the prediction of the heat distribution as well as the analysis on operating temperature of a single busbar with compliance to the British National and International Standard (BS 159: 2014) using the Finite Element Method (FEM) in COMSOL Multiphysics software. The copper busbar dimension used for this research was 20mm x 6mm x 300mm, and the fundamental Root Mean Square (RMS) current was 419.1 A. The size of this busbars can withstand the maximum current of 430 A at a maximum operating temperature of 90°C, which complies with the standard requirement. The fundamental current is injected with variation of total harmonic distortion in current up to 55% with an interval of 5%. According to the findings, the operating temperature increases in direct proportion to the increase in total harmonic distortion with the current injections. With the presence of 55% of total harmonics in the current, the current was increased up to 57.73 A from the fundamental current, while the operating temperature was increased up to 140C from the fundamental temperature. The total harmonics in current produced by the nonlinear loads could affect the operating temperature of the busbars, and this continuous operation of current flow will affect the busbars' lifespan due to the occurrence of overheating.