| 摘要 |
A switchgear having a function of diagnosing abnormality by analyzing temperature and through-current is disclosed. The switchgear according to an embodiment of the present invention comprises: an external wired temperature sensor module installed to an outside of the switchgear to sense the temperature, transmit by converting the value sensed into a first voltage value corresponding to the temperature sensed and has an unique address; an internal wireless temperature sensing module installed to at least one conductor connection area in the switchgear to sense the temperature, transmit by converting the value sensed into a first voltage value corresponding to the temperature sensed and has an unique address; a temperature converting module to receive the first voltage value from the external wired temperature sensor, receive the second voltage value form the internal wireless temperature sensor, and convert the first voltage value and the second voltage value received into corresponding external temperature and internal temperature respectively; a CT transformer installed to at least one conductor connection area in the switchgear for measuring operating current; a through-type transformer installed to secondary side of the CT transformer for measuring operating current to transfer operating current measured in the CT transformer for measuring operating current; and a disorder status analyzing module to analyze whether temperature change per hour, that is, a difference between the internal temperature which is converted in the temperature converting module and the external temperature which is converted in the temperature converting module increases abruptly compared with a change per hour of operating current transferred through the through type transformer. |
