| 摘要 |
PURPOSE: An electric device for storing an event in a nonvolatile memory is provided to obtain a storage function as a nonvolatile memory without connecting an external power source by storing the event after a circuit breaker operates. CONSTITUTION: A circuit breaker is arranged in an electric connection path between an external power source(200) and an electric device and blocks external power in an abnormal state. An auxiliary power source(120) provides power to the electric device if the external power is blocked. A controller(130) controls the operation of the circuit breaker and the auxiliary power source. The auxiliary power source is connected in parallel to an output terminal of a circuit which provides power to an internal circuit. [Reference numerals] (110) Circuit breaker; (120) Auxiliary power source; (130) Controller; (140) Main power source; (150) Memory unit; (200) External power source
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