Circuit breakers are made in varying sizes, from small devices that protect low-current circuits or individual household appliances, to large switchgear designed to protect high voltage circuits feeding an entire city. The generic function of a circuit breaker, or fuse, as an automatic means of removing power from a faulty system, is often abbreviated as OCPD (Over Current Protection Device). Also, there are many different types of Smart Circuit Breaker, Ewelink WIFI Circuit Breaker, Tuya WIFI Circuit Breaker, RS485 Circuit Breaker, Remote Control Circuit Breaker, Zigbee Circuit Breaker, Solar Systems Circuit Breaker, Automatic Recloser Circuit Breaker, DC WIFI Circuit Breaker, RS485 DC Circuit Breaker, etc.http://www.hochiot.com/smart-circuit-breaker/