Amizah Md. Ariffen
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Amizah Md. Ariffen
Official Name
Amizah, Md. Ariffen
Alternative Name
Md Ariffen, Amizah
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Scopus Author ID
57219031424

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An experimental work on effect of bending down conductor with reinforced concrete

2020-01-07 , Amizah Md. Ariffen , Syahrun Nizam Md Arshad @ Hashim , Ab Kadir M.Z.A. , Jasni J. , Nasrul Helmei Halim

Down conductor is one of the pivotal parts of the Lightning Protection System (LPS) that diverting the lightning current captured by the air termination system to the earth termination system in each protected structure. A straight down conductor, is ideally suited for the best-case scenario regarding reliability and safety protection. One to aesthetical aspects, down conductor is undesirably bent in most current buildings. However, only the primary bare type of a down conductor is undergone such process, and bent at a certain degree which depending on the structure itself. Hence, this study is to investigate the bending degree effect on down conductors, by looking at breakdown voltage around the bent area with the presence of concrete wall and reinforcement bar. This experimental work conducted on a reduced scale of reinforced concrete which tested with high impulse voltage. It was determined that the bending down conductors has a significant effect on the bent (vertex) area with the interaction of concrete wall and reinforcement bar.

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Performance of Galvanized - Steel and Copper Grounding Electrodes Using Bentonite and Coconut Husk Ashes as an Additives Material to Grounding System

2020-07-09 , Abu Bakar O. , Syahrun Nizam Md Arshad @ Hashim , Amizah Md. Ariffen , Nasrul Helmei Halim , Wooi Chin Leong , Muhammad Izuan Fahmi Romli , Aqilah Sofiyah Hasni N.

Natural enhancement material often uses to improve performance of the soil resistivity in grounding system. Due to the different soil condition, focus for effective grounding go to the soil itself. Soil resistivity, moisture content and surrounding environment contribute to the impedance of the grounding. The usage of material to enhance the grounding can be considering important to maintain the grounding system performance. There are several techniques used to treat the soil using chemical substance known as grounding enhancement material. This technique produces low resistivity to the grounding electrode however the soil become contaminated. This paper will discuss about the performance of coconut husk ashes and bentonite as natural enhancement material and method being used to evaluate the results.

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Analysis of wavelet transform de-noising technique based on measured lightning return stroke electric field

2021-05-03 , Syahrun Nizam Md Arshad @ Hashim , Ab Kadir M.Z.A. , Izadi M. , Hamzah M.N. , Amizah Md. Ariffen , Wooi C.L. , Anuar A.

This paper presents a difference type of wavelet transform de-noising technique based on measured lightning electric field. The lightning electric fields captured by two parallel plats sensor and the signal were analyses accordingly. In engineering application, lightning stroke current parameter will relate with electric fields and these parameters can be recognized by direct and in-direct measuring method. Therefore, measuring lightning electric fields (LEF) using parallel plate was done by many researchers. However, measuring LEF has many disturbances such as noise from other apparatus and other device. Therefore, de-noising of LEF signal is important to get useful signal for further research. For this reason, the Centre for Electromagnetic and Lighting Protection Research (CELP) group has been working on a research program to study and characteristic lightning using de-noising technique in order to process and analyse the radiated LEF produced during flash happens. Only three types of wavelet transform are selected and there are Daubechies, Symlets and Coiflets wavelet. The result will be discussed and the best will be selected based on the measured signal.

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Analysis of the Behaviour and Effect of Grounding Filler Materials on Grounding System

2020-07-09 , Aqilah Sofiyah Hasni N. , Syahrun Nizam Md Arshad @ Hashim , Amizah Md. Ariffen , Nasrul Helmei Halim , Wooi Chin Leong , Muhammad Izuan Fahmi Romli , Abu Bakar O.

The grounding system plays an important role in the electrical system part as it gives protection during fault or lightning occur. The main purpose of the grounding system is to protect humans, electrical appliances and buildings from electrical shock due to lightning or another form of electricity that hazardous. Thus, to install an excellent electrical system and complete its circuit, a grounding system performance must be taken into account. But, in certain cases, due to the geological condition, the soil resistivity is not good enough. Therefore, enhancement filler material has been used to reduce grounding resistance. In this project, it is aimed to elaborate on the usage of Coconut Husk, Paddy Husk, and Bentonite as grounding filler materials to reduce the soil resistivity and improves the grounding system. The result showed that Bentonite showed better performance compared to Coconut Husk and Paddy Husk.

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Effect of concrete orientation as an enhancement material in grounding system

2020-07-09 , Hasni N.A.S. , Syahrun Nizam Md Arshad @ Hashim , Amizah Md. Ariffen , Halim N.H. , Wooi Chin Leong , Muhammad Izuan Fahmi Romli , Bakar O.A.

To achieve an excellent grounding system, an alternative solution was developed by using enhancement material to modify the soil surrounding the rod. These materials can effectively reduce soil resistivity and grounding resistance for a better grounding system. To achieve this goal, the fundamental part must be taken into account. In this study, the main objective is to analyze different concrete orientations as enhancement material in the grounding system. A 3-D orientation of concrete has been designed using Finite Element Method (FEM) software to analyze the performance of the electric field in the grounding system with different orientation of concrete. Every orientation of concrete had been clarified into four different cases which are full concrete, half concrete, three-quarter concrete, and a quarter concrete. From the result, full concrete is the best orientation of concrete design to be employed at the grounding site as it has a low electric field compared to the other concrete orientation.

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Analysis on Behavior Grounding Electrode Resistance base on Profiling Method

2020-07-09 , Nurul Huda Hashim , Syahrun Nizam Md Arshad @ Hashim , Halim, Nurul Hazwani Abd , Wooi Chin Leong , Amizah Md. Ariffen , Aminudin Anuar , Aqilah Sofiyah Hasni N. , Abu Bakar, Osman

An earthing system or known as grounding system in an electrical installation where by the grounding system connects specific parts of that installation with the Earth's conductive surface for safety and functional purposes. It is the process of transferring the immediate discharge with the aid of the low resistance wire of the electrical energy directly to the earth. It is really an important role playing in electrical system part as grounding system give protection during fault or lightning occur. In addition, grounding system also give protection for human electrical appliance and building from electrical shocks due to electrical fault or lighting occur. In this research will shows that to identify the best location to install the grounding electrode. This method is used on 10 x 10 meters which is 121 point will be investigated. The result of 0.3m, 0.6m, and 0.9m were analyzed using MATLAB software to produce profiling and shows the perfect location to install the Grounding system electrode.

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