Abstract:

In order to achieve the reusability of the internal controller of IoT circuit breakers for different phase numbers of circuit breakers,a combination design of circuit breakers,power supplies and gateways is adopted in hardware,and a scheme different from traditional measurement chips is adopted in software.A design and implementation method of the circuit breakers internal controller collecting voltage and current values directly through ADC combined with software algorithms is proposed,and a method for automatically allocating circuit breaker addresses is also proposed.And the accuracy of electrical quantity collection is tested through experiments.The proposed method solves the problem of single-phase circuit breakers requiring the introduction of a neutral line and circuit breakers with different numbers of phases relying on different types of acquisition chips,which greatly reduces the production costs and provides the convenience for normalized management of production materials.

Key words: internet of things (IOT) circuit breaker, reusability, production cost, measurement chip