电器与能效管理技术 ›› 2022, Vol. 0 ›› Issue (8): 61-66.doi: 10.16628/j.cnki.2095-8188.2022.08.011

• 电器设计与探讨 • 上一篇    下一篇

塑壳断路器双金属片选用与设计

肖林, 蒋顾平   

  1. 上海良信电器股份有限公司, 上海 200137
  • 收稿日期:2022-01-25 出版日期:2022-08-30 发布日期:2022-10-11
  • 作者简介:肖林(1993—),女,主要从事低压电器塑壳断路器研究工作。|蒋顾平(1982—),男,高级工程师,主要从事低压电器塑壳断路器研究工作。

Selection and Design of Bimetallic Sheet of MCCB

XIAO Lin, JIANG Guping   

  1. Shanghai Liangxin Electrical Co.,Ltd.,Shanghai 200137,China
  • Received:2022-01-25 Online:2022-08-30 Published:2022-10-11

摘要:

热磁式塑壳断路器一般使用双金属片进行过载脱扣保护。双金属片的位移通过变形弯曲来打动操作机构实现过载脱扣保护。双金属片的受热弯曲位移是最主要的特性设计,另外需要校核弯曲力能否克服脱扣力,并且要求双金属片的发热达到一定范围。最后,通过实例计算验证了双金属片的设计与选用方法。

关键词: 塑壳断路器, 双金属片, 过载脱扣, 推力

Abstract:

Thermal magnetic moulded case circuit breaker(MCCB) generally uses bimetallic sheet for overload tripping protection.The displacement of bimetallic sheet moves the operating mechanism through deformation to realize overload tripping protection.In the design,the thermal bending displacement of bimetallic sheet is the most important characteristic design.In addition,it is necessary to check whether the bending force can overcome the tripping force,and the heating of bimetallic sheet is required to reach a certain range.Finally,the design and selection method of bimetallic sheet are discussed through several examples.

Key words: moulded case circuit breaker(MCCB), bimetallic sheet, overload trip, thrust

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