The utility model discloses a low tension switchgear tripping operation, excess temperature initiative alarm device installs on residual current circuit breaker's power line, including protective housing, install the return circuit logical judgment module who is connected with residual current circuit breaker both sides power line in the protective housing, return circuit logical judgment module is connected with information sending unit, and still including connecting the temperature detection module on residual current circuit breaker, temperature detection module is connected to information sending unit, information sending unit protective housing 2 to terminating machine, return circuit logical judgment module concludes that residual current circuit breaker is permanent fault, and then through return circuit logical judgment module switch -on information sending unit's signal circuit, information sending unit informs area management person residual current circuit breaker tripping operation position to terminating machine send SMS, and the very first time of being convenient for judges that residual current circuit breaker 0 reduces the power off time as far as possible, and this device has been realized integrating, the modularization, install the block terminal on the line pole in, residual current circuit breaker 1 and with low costs.