针对某柜内断路器在冲击作用下出现跳闸问题，基于全面质量管理法中的PDCA循环，找出问题产生的主要原因，制定并筛选出适当的处置方案.研究结果表明：柜内断路器跳闸问题是由于断路器抗冲能力弱，冲击状态下振动强度大所导致的.在此基础上，设计出具有隔振结构的安装支架，并结合有限元分析对断路器的冲击行为进行力学仿真，理论证明所采用方案的可靠性.进一步通过试验验证了所提出方案对提高断路器系统抗冲击能力的有效性，最终实现了断路器在试验要求冲击载荷下不再跳闸的目标，取得了良好的效益.以上研究结果也证明了PDCA循环在仪控设备产品的设计和改进中可以发挥良好的作用.

In order to solve the trip problem of breaker system of the instrument control equipments in the case of impact situation, PDCA cycle which based on the OEC (overall every control and clear) was conducted to identify the main reason of the problem, and the appropriate disposal programs were screened out. Results show that the trip phenomenon is caused by the lower ability of breaker system in resisting impact behaviors which consequently results in the stronger vibration intensity. Therefore, a mounting bracket which contains vibration isolator was designed, finite element analysis was carried out to simulate the impact behavior of the breaker system and proved the reliability of the program. In addition, experimental test was performed to verify the effectiveness of the disposal program, which experimentally indicated the ability of breaker system in resisting impact was improved significantly. This results prove that the PDCA cycle plays a significant role in designing and improving the instrument control equipments as well.