住宅分户箱三相配电设计探讨*

林承过（厦门合立道工程设计集团股份有限公司，福建省厦门市 361004）

Study on Three‑phase Power Distribution Design of Household Boxes *

LIN Chengguo(Xiamen Hordor Architecture & Engineering Design Group Co.,Ltd.,Xiamen 361004,Fujian Province，China)

Abstract：On the basis of the residential power distribution design and practical investigation over many years,the three‑phase power distribution of household boxes is analyzed from the aspects of total load calculation,overvoltage(undervoltage)protection and residual current operated protection;suggestions are proposed to rectify the irrational or flawed parts of the currently applicable standards and procedures;effective solutions are provided regarding three‑phase balance,neutral line break protection and indirect contact protection.

Key words：resistance;three‑phase power distribution;load calculation;three‑phase balance;demand coefficient method;overvoltage(undervoltage);self‑recovery;residual current operated protection

摘　要：结合多年住宅配电设计及实践调研，从负荷计算、过（欠）电压保护、剩余电流动作保护方面，对住宅分户箱三相配电进行分析；对现行规范规程不合理、不完善之处提出建议；在三相平衡、中性线断线保护及间接接触防护方面，提供有效解决方案。

关键词：住宅；三相配电；负荷计算；三相平衡；需要系数法；过（欠）电压； 自恢复式；剩余电流动作保护

中图分类号：TU852      　　  　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2022.09.005