Nasrul Helmei Halim
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Preferred name
Nasrul Helmei Halim
Official Name
Nasrul Helmei, Halim
Alternative Name
Halim, Nasrul Helmei
Halim, N. H.
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Scopus Author ID
15122008300

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Performance of Backfill Material for Grounding System under High Voltage Condition

2022-01-01 , Nasrul Helmei Halim , Syahrun Nizam Md Arshad @ Hashim , Nor Haidar Hashim , Adzis Z. , Isa M. , Bakar O.A.

Grounding (or earthing) play the main role to in order to protect electrical equipment, building and life from lightning, switching and earth fault occurrences. A good grounding system must be able to dissipated this unwanted charge in very fast time and this can be achieved by reducing the grounding resistance. Introduction to backfill material to be filled into grounding pit is widely implemented in order to lowering the resistance of grounding system. This paper investigates the performance of marconite, cement and sand as part of backfill materials for ufer type grounding system under alternating high voltage and impulse voltage condition. The purpose of high impulse voltage experiments is to determine the performance of above said materials under transient condition while the alternating high voltage experiment to observed the behaviour backfill material under leakage or fault current occurrence. The findings reveal that performance of grounding system may significantly change from the expected result at design stages.

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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 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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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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