ZHANG Hao1, XIE Qiu\|hui1, CAI Chun\|hao1, FU Pei\|gang1, ZHAO Yong1, ZHU Ming\|lei2,JUN Hong\|quan1, WU Fei1, ZHENG Lun1

(1. Shanghai Entry\|Exit Inspection and Quarantine Bureau, Shanghai 200002, China

2. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

 

 

Abstract: Aiming at the problems of high power consumption and low automation level in the traditional equipments measuring low voltage circuit breakers, the related testing standards and the existing problems of the traditional equipments were summarized, and a novel machinery structure of current detection equipments for low voltage circuit breakers was investigated. Based on a brief introduction to the proposed equipment structure, the relationship between the cylinder pressure and the contact resistance was analyzed, and the conclusion was obtained that the power consumption of the equipment was reduced with its long material life.Based on the research on the path of the current loop in the proposed equipment, the conclusion was obtained that the test voltage was improved and the design of the transformer in the equipment was optimized because of its special structure. Based on the summary of the operation mode, a new automated assembly line project based on this device was presented. The over current characteristics of low voltage circuit breakers were tested by the proposed equipment. The research results indicate that the power consumption of the proposed equipment is lower than the traditional ones.The proposed equipment has characteristics of small size, low power consumption and high automation level on the condition of meeting the test requirements.

Key words: low voltage circuit breaker overcurrent detection; equipment mechanical structure; test power consumption