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在现代大型建筑中,都存在着强电系统和弱电系统两个部分,强电系统包括10kV变电站及其他的配电设备。弱电系统则是以计算机组成的各种信息网络。由于强电系统与弱电系统的工作状态和性质不同,采用的接地保护方式也不同。但是它们之间又存在着必然的联系。在大型建筑电气施工中,应注意以下几个方面的问题: (1)不能把弱电系统的接地与强电系统的接地互相联接。因为,强电系统的接地网并非实际的等电位,在不同的网点会出现电位差。当有大的接地电流注入地网时,各网点就存在较大的电位
In modern large buildings, there are two parts of the system of strong electricity and weak electricity, including 10kV substations and other power distribution equipment. Weak electricity system is based on a variety of computer information network. Due to the different working status and nature of the heavy-current system and the weak-current system, the grounding protection method adopted is also different. However, there is an inevitable connection between them. In the electrical construction of large buildings, should pay attention to the following aspects: (1) can not be weak grounding system and grounding system grounding. Because, power system grounding grid is not the actual equipotential, potential differences appear in different outlets. When there is a large ground current injected into the network, the outlets there is a large potential