Direct-current power supply mutual inductance fault detection device

The invention discloses a direct-current power supply mutual inductance fault detection device, and relates to the technical field of mutual inductance fault detection, the direct-current power supply mutual inductance fault detection device comprises a shell and a fault detection mechanism, the fault detection mechanism comprises a detection groove, a temperature sensing column and a sliding block, the detection groove is fixedly arranged in the shell, the temperature sensing column is movably inserted into the detection groove, and the sliding block is inserted into the temperature sensing column. The two sliding blocks are movably installed at the two ends of the interior of the detection groove in a sliding mode, and the temperature sensing column is movably placed between the two sliding blocks. The temperature sensing liquid in the temperature sensing column begins to expand under the influence of high temperature, if the temperature rises and the temperature sensing column bursts due to faults, the sli