Fault isolation device for passive temperature measurement

The utility model discloses a fault isolation device for passive temperature measurement, which comprises an FTU (Feeder Terminal Unit) box body, a GPRS (General Packet Radio Service) module is fixedly arranged at the bottom of the inner side of the FTU box body, an ultrahigh frequency module is fixedly arranged on one side of the inner wall of the FTU box body, and the ultrahigh frequency module is in signal connection with an RFID (Radio Frequency Identification Device) temperature measurement chip. An ultrahigh-frequency signal is transmitted through an ultrahigh-frequency module, so that an RFID temperature measurement chip encapsulated in a circuit breaker obtains energy through the ultrahigh-frequency signal, the RFID temperature measurement chip obtains an antenna resistance value at the moment after multiple times of correction through an automatic tuning circuit in the RFID temperature measurement chip, and the antenna resistance value is converted into a corresponding temperature value; and the mult