Circuit breaker: A switch which protects an electrical circuit from overload by opening the circuit when the current flow exceeds a pre-determined level. Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostChoke Next PostClearance volume