曹立强（中国建筑东北设计研究院有限公司，沈阳市 110006）

Reliability Verification of Single‑phase Earth Short‑circuit Protection in Super High‑rise Buildings

CAO Liqiang（China Northeast Architectural Design & Research Institute Co.,Ltd.,Shenyang 110006，China）

Abstract：This paper discusses the necessity of automatic disconnection of supply for verification of protection against indirect contact calculates the single‑phase earth short‑circuit current of typical distribution circuits in super high‑rise buildings and checks the sensitivity of circuit breakers,and provides some suggestions on the selection of circuit breakers and cables for super high‑rise buildings through comparative analysis of measures to improve sensitivity.

Key words：super high‑rise building;TN system;distribution circuit;earth fault current;automatic disconnection of supply;protection against indirect contact;circuit breaker;sensitivity check

摘　要：论述自动切断电源作间接接触保护的校验的必要性，对超高层建筑的典型配电回路进行单相接地短路电流计算及断路器灵敏度校验，通过对提升灵敏度措施的比较分析，提供几点超高层建筑断路器和电缆选择的建议。

关键词：超高层建筑；TN系统；配电回路；接地故障电流；自动切断电源；间接接触保护；断路器；灵敏度校验

中图分类号：TU852                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.03.003