What is the purpose of equipotential bonding? What are the requirements for equipotential bonding connectors in explosion-proof equipment?
Thread Content
The metal framework of the structure, as well as the non-electrified metal parts such as the enclosures of equipment contained within the structure, pipes, valves, etc., should be electrically connected to the grounding device in a reliable manner, so that all non-electrified metal parts of the structure form an equipotential body. This is what we commonly refer to as equipotential bonding. https://p3-sign.toutiaoimg.com/tos-cn-i-axegupay5k/a15b6a6f3f6248f39896de08c4f112e8~tplv-tt-origin-web:gif.jpeg?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1767258946&x-signature=G7Im9yrXgnh%2FnDPfFxn%2BZ%2BlVYxQ%3D Its function is to maintain a balanced potential, preventing a voltage difference from arising between uncharged metal components; this helps avoid electric shocks, equipment damage, and electromagnetic interference. Equipotential bonding is commonly used in areas such as building lightning protection, fire and explosion prevention, electrical safety, and the protection of electronic equipment. The equipotential bonding terminals for explosion-proof equipment can be installed inside or outside the equipment’s enclosure. For electrical equipment, these bonding terminals are usually placed outside the enclosure, and they must be able to make effective connections with conductors having a cross-sectional area of at least 4 mm2. When the equipotential bonding terminals on the metal enclosure of electrical equipment also serve as external grounding terminals, it is important that the dimensions of such terminals meet the requirements for connecting the protective grounding conductors. https://p3-sign.toutiaoimg.com/tos-cn-i-6w9my0ksvp/553dba6ea8a44bf0ae3bdaa8067ea635~tplv-tt-origin-web:gif.jpeg?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1767258946&x-signature=8AB471wNwA1Avno30dI7z3QQVPo%3D In areas prone to fire and explosion, for electrical equipment that does not require grounding (such as equipment with enhanced insulation or double insulation), or for electrical equipment that does not need additional grounding (such as intrinsically safe equipment and IT systems), although there is no risk of electric shock, equal potential bonding is still carried out by installing auxiliary equipotential connections in order to reduce the risk of ignition caused by static electricity.
【Ten Years of Rapid Development in Chemical Engineering Equipment】Full capacity commissioning of China’s most remote offshore wind power projects by 2025 https://bbs.hcbbs.com/thread-5708401-1-1.html (Source: Haichuan Chemical Industry Forum (HCBBS))
【Ten Years of Rapid Development in Chemical Equipment】The first electrocracking furnace in China was successfully put into operation at Dushanzi Petrochemical Company between 2016 and 2025. https://bbs.hcbbs.com/thread-5709248-1-1.html (Source: Haichuan Chemical Forum (HCBBS))
【Ten Years of Rapid Development in Chemical Engineering Equipment】From 2018 to 2025, Shandong Zhanggu successfully developed its first domestically produced TEP steam compressor, which was then shipped out. https://bbs.hcbbs.com/thread-5709282-1-1.html (Source: Haichuan Chemical Industry Forum (HCBBS))
【Ten Years of Rapid Development in Chemical Engineering Equipment】From 2018 to 2025, Shandong Zhanggu successfully developed its first domestically produced TEP steam compressor, which was then shipped out. https://bbs.hcbbs.com/thread-5709282-1-1.html (Source: Haichuan Chemical Industry Forum (HCBBS))
【Ten Years of Rapid Development in Chemical Equipment】The pilot production base of the Hami High-Oil Coal Research Institute, covering the period 2020–2025, was officially put into use in Yiwu County. https://bbs.hcbbs.com/thread-5709304-1-1.html (Source: Haichuan Chemical Forum (Hcbbs))
【Ten Years of Rapid Development in Chemical Equipment】Major breakthroughs from 2024 to 2025! ! Two breakthroughs in domestic high-end electric drives: ultra-high-speed motors capable of operating at 10,000 revolutions per minute and motors with a vacuum distribution capacity of 100,000 have passed the evaluation tests. https://bbs.hcbbs.com/thread-5709405-1-1.html (Source: HaiChuan Chemical Industry Forum (HuaHaiChuanLiu hcbbs))
【Ten Years of Rapid Development in Chemical Engineering Equipment】The first nationwide test of ammonia-fueled operation of marine low-speed engines under all operating conditions was carried out in Qingdao from 2925 to 2025. https://bbs.hcbbs.com/thread-5709443-1-1.html (Source: Haichuan Chemical Industry Forum (HCBBS))
【Ten Years of Rapid Development in Chemical Equipment】From 2027 to 2025, Yanshan Petrochemical’s 1.2 million tons per year gasoline adsorption desulfurization unit became the first of its kind in China to receive carbon neutrality certification. https://bbs.hcbbs.com/thread-5709493-1-1.html (Source: HaiChuan Chemical Forum (HuaHaiChuanLiu hcbbs))
【Ten Years of Rapid Development in Chemical Equipment】First of its kind in China from 2928 to 2025! Pilot production of Ordos’ “sand thermal battery” a success! https://bbs.hcbbs.com/thread-5709536-1-1.html (Source: Haichuan Chemical Industry Forum (Hua Hai Chuan Liu hcbbs))
【Ten Years of Rapid Development in Chemical Engineering Equipment】China’s first large-scale perovskite building-integrated photovoltaic demonstration project was officially connected to the power grid from 2929 to 2025. https://bbs.hcbbs.com/thread-5709550-1-1.html (Source: Haichuan Chemical Industry Forum (HCBBS))