消防风机配电线路热脱扣设置原则

刘海滨（兰州有色冶金设计研究院有限公司，兰州市 730000）

Principles for Setting Thermal Release of Firefighting Fan Distribution Lines

LIU Haibin（Lanzhou Engineering & Research Institute of Nonferrous Metallurgy

Co.,Ltd.,Lanzhou 730000，China）

Abstract：Through the analysis of the working conditions of firefighting fans,an optimal thermal release setting method that meets both the specification requirements and the distribution line protection shall be found from the meaning of overload protection to ensure the safe and reliable operation of the distribution system.

Key words：firefighting fan;distribution system;overload protection;locked‑rotor protection;thermal release;AC motor;electromagnetic release;short‑circuit protection

摘　要：通过对消防风机的工况分析，从过负荷保护的意义出发，找到既满足规范要求，又符合配电线路保护的一种最优热脱扣设置方式，以保证配电系统安全、可靠运行。

关键词：消防风机；配电系统；过负荷保护；堵转保护；热脱扣；交流电动机；电磁脱扣；短路保护

中图分类号：TU892                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2023.05.004