冯志文（陕西省建筑设计研究院有限责任公司，西安市 710003）

 

Solution Case for the Electrical Fault in a Bank Computer Center

Cheng Shaoyi（Gansu Institute of Architectural Design & Research，Lanzhou 730030，China）

Feng Zhiwen（Shanxi Architectural Design & Research Institute Co.，Ltd.，Xi’an 710003，China）

 

Abstract The analysis process and solutions for the electrical fault in a bank computer center are introduced. UPS switch along with the external protection switch tripped many times because of fault，the causes of which are that：① the N conductor and the PE conductor in the TN-C-S system are first separated and then combined；② three-phase load is unbalanced；③ harmonic impact.

Key words Electrical fault Grounding Three-phase load unbalance Voltage between N conductor and ground Neutral point offset Harmonics

 

摘 要 介绍了某银行计算机中心电气故障的分析过程和解决措施。UPS 保护开关连同外部保护开关多次发生故障跳闸，分析其原因为：① TN - C - S 系统中 N 线与 PE 线分开后又合并；② 三相负荷不平衡；③ 谐波影响。

关键词 电气故障 接地 三相负荷不平衡 N线对地电压 中性点偏移 谐波