TN系统中微断故障防护的可靠性探讨

作者：万小亮

单位：上海天华建筑设计有限公司厦门分公司

摘要：GB 51348-2019《民用建筑电气设计标准》(以下简称“《新民标》”)中提出“对于交流配电系统中(120V

关键词：灯具故障防护间接接触防护故障防护B型微型断路器故障防护切断时间

作者简介：万小亮，厦门分公司电气专业组长，注册电气工程师，Email:664967713@qq.com。;

尊敬的用户，本篇文章需要1元，点击支付交费后阅读

参考文献[1] GB 51348-2019 民用建筑电气设计标准[S].北京：中国建筑工业出版社，2019.

[2] 施耐德电气(中国)有限公司.ACti9产品目录2018[X].

[3] GB 50054-2011 低压配电设计规范[S].北京：中国计划出版社，2012.

[4] 中国航空工业规划设计研究总院有限公司.工业与民用供配电设计手册(第四版)[M].北京：中国电力出版社，2016.

Discussion on the Reliability of Micro-break Fault Protection in TN System

Wan Xiaoliang

(Shanghai TIANHUA Architecture Planning & Engineering Ltd.)

Abstract: GB51348-2019 puts forward that "If the current does not exceed 32 A in AC distribution system(120 V GB50051-2011 “Distribution circuit or terminal circuit which only supplies power to fixed electrical equipment, the longest power cut-off time of fault protection shall not be greater than 5 s”,It is more more stringent.Combined with the latest national standard, the paper analyzes the fault protection of lighting lamps by miniature circuit breaker in TN system, and puts forward several solutions, At the same time, the matching table of maximum protection length of copper conductor corresponding to different cross sections of B and C miniature circuit breakers is drawn for reference by designers.

Keywords: protection against lamp failure; protection against indirect contact; fault protection; type B miniature circuit breaker; cut off time of fault protection;

1409 0 0