利用锁紧机构提高双断点塑壳断路器限流性能研究

Research on Raising Breaking Capacity of Double-Break MCCB by Locking Mechanism

针对双断点塑壳断路器短路时动触头斥开回落易发生触头熔焊的现象,提出一种锁紧机构的装置方案。介绍锁紧机构的设计及工作原理,并进行ADAMS运动学仿真及Ansys静力学分析,试验验证其可行性。锁紧机构可有效防止动触头被大电流斥开后又回落现象,提高塑壳断路器的限流性能,最终提高塑壳断路器分断性能。

A new locking mechanism device was designed,which aims to solve the phenomenon that the moving contact falling again and fusion welding,when double-break of MCCB is at short circuit. The design and working principle of the locking mechanism were introduced,and the kinematics simulation by ADAMS and static analysis by ANSYS were carried out,in order to validate its feasibility. The locking mechanism can effectively prevent the falling phenomenon of the moving contact,improve the reaction speed and limiting current performance of MCCB,and ultimately achieve the goal of improving MCCB＇s breaking capacity.