A Study of Grounding Electrode Design of Ground System in Medical Building

• Main Authors: Jui-Sung Chen, 陳瑞松
• Other Authors: 曾國雄
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/g63q45

碩士 === 國立臺北科技大學 === 電機工程系研究所 === 102 === Nowadays, most modern medical buildings are equipped with high-tech automation medical instrument. Furthermore, lightning invasion of precautionary measures and the quality and stability of electricity supply have high requirements. Therefore, owners of hospitals put a lot of emphasis on the planning and the design of grounding system’s grounding electrode. This thesis focuses on the planning and design of medical buildings’ grounding electrode. Based on the IEEE Std.80 design procedures, every planning and design first undergo the following procedures: (1) selection for suitable grounding electrode (2) examination of building base’s soil electrical resistivity via electrical resistivity exploration, and (3) finalization of the design in grounding system’ grounding electrode. Afterwards, simulation calculation and confirmatory experiments on ground resistance value (Re), ground potential rise (GPR), touch voltage, step voltage, are made to determine whether the ground grid IEEE''s recommended conditions. This thesis discusses issues in the field of engineering techniques, such as the effect of extending the grounding electrode gap, enlarging wire diameter, increasing the number of ground electrodes, changing solid ground network to hollow ground network, and other related design parameters on ground resistance value. As for the new ground after the completion of the project, it enabled the discovery of lead wire grounding system due to syphonage. Therefore, this thesis also reviews abnormal ground terminal box seepage problems and propose ways to improve it.