数据中心低压配电系统接地型式和开关的选择

Selection of Grounding Types and Switches for Low-voltage Distribution Systems in Data Centers

考虑杂散电流形成的电磁干扰和四极开关选用导致的“断零”风险对数据中心正常运行的影响,以A级数据中心为例,从可靠性和经济性角度提供“一点接地”和“直接接地”两种设计方案并结合低压配电系统接地型式分析其开关的选择,说明两种方案的优缺点、注意事项和适用场景。提出数据中心低压配电系统接地型式和开关的选用问题是相互影响的,需要综合衡量各种因素带来的风险,选择安全可靠、经济合理的数据中心低压配电系统设计方案。

Considering the impact of electromagnetic interference caused by stray current and the risk of"faulted neutral line"caused by the selection of four pole switch on the normal operation of data centers,taking A-level data centers as an example,two design schemes of"one point grounding"and"direct grounding"are provided from the perspective of reliability and economy,and the selection of switches is analyzed by combining the grounding types of low-voltage distribution systems.The advantages and disadvantages,precautions,and applicable scenarios of the two schemes are explained.The selection of grounding types and switches for low-voltage distribution systems in data centers is interrelated,and it is necessary to comprehensively evaluate the risks caused by various factors and choose a safe,reliable,and economically reasonable design scheme for low-voltage distribution systems in data centers.