circuit breaker vs isolator

circuit breaker

noun
  • More specifically, a circuit breaker that automatically breaks overcurrent conditions; a type of overcurrent protective device. 

  • Synonym of trading curb 

  • An electrical switch capable of opening and closing an electrical circuit in all operating conditions, including fault situations. 

  • Quarantine measures intended to prevent spread of pandemics, such as the coronavirus. 

isolator

noun
  • An electrical device that detects short circuits and isolates them. 

  • A device that isolates something from the surrounding environment to keep it sterile. 

  • A transparent box for holding small live animals. 

How often have the words circuit breaker and isolator occurred in a corpus of books? (source: Google Ngram Viewer )