Abstract
Protection against lightning is always a challenging job for the researcher. The consequences due to lightning on different building shapes needs a comprehensive knowledge in order to provide the information to the common man. This paper is mainly concern with lightning pattern when it strikes on the building with different shape. The work is based on the practical experimental work in high voltage laboratory. Different shapes of the scaled structures have been selected in order to investigate the equal distribution of lightning voltage. The equal distribution of lightning voltage will provide the maximum probability of lightning strike on air terminal of the selected shapes. Building shapes have a very important role in lightning protection. The shapes of the roof tops have different geometry and the Franklin rod installation is also varies with changing the shape of the roof top. According to the ambient weather condition of Malaysia high voltage impulse is applied on the lightning rod installed on different geometrical shape. The equal distribution of high voltage impulse is obtained as the geometry of the scaled structure is identical and the air gap for all the tested object is kept the same. This equal distribution of the lightning voltage also proves that the probability of lightning strike is on the corner and the edges of the building structure.
Highlights
This paper presents the pattern of lightning on different shapes of the roof top of the building
The work done in this paper is experimental work performed in high voltage laboratory
The results of the experimental work can be explained for every shaped tested under the high voltage condition in high voltage lab
Summary
This paper presents the pattern of lightning on different shapes of the roof top of the building. Franklin rod is the most important element of lightning protection system (LPS). It is installed on geometrical structure with different arrangement. The rod is connected with down conductor and earth wire All these three collectively ground the current safely [6]. There are different international standard of lightning protection system. It can be divided into NFPA 780 and 781 which is an American standard. In this case lightning is diffused through franklin rod, grounding conductor and earth wire. In the same way for internal lightning protection a protection zone is produced which reduces the effect of electromagnetic field[8]
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