Novel intelligent heavy current circuit breaker

XV Zhiwang,ZHENG Liang,QIN Huibin

（College of Electronic and Information Engineering,Hangzhou Dianzi University,Hangzhou 310018,China）

Abstract: In order to solve the problems of the circuit breaker, which is low current, less intelligent, unsafe, the novel intelligent heavy current circuitbreaker was investigated After the analysis of different current and control, the connection of the MCU and the circuitbreaker was established A method was presented to use two current transformers to sample the currents of the zero line and the live line on the circuitbreaker, with the help of the highperformance of ATMEGA16, the data acquisition and storage, line control, wireless communications, interface display and other functions could be achieved on one chip In tripper, the electronic components were used to replace the traditional large mechanical tripper The functions of circuit unit and tripper were evaluated on the MCU, the novel intelligent heavy current circuitbreaker were tested The experimental results show that the device is more safe, sensitive, humanized and convenient when the heavy current is 20 A～3 000 A

Key words: circuitbreaker；intelligent；heaven current；wireless communication