Transformer iron core grounding current monitoring device

The utility model discloses a transformer iron core grounding current monitoring device which comprises a box body, a fixing plate is arranged on one side in the box body, a voltage detector is arranged at the upper end of the fixing plate, a grounding wire is arranged on one side of the voltage detector, and the lower end of the grounding wire penetrates through the lower end of the box body. A straight-through CT sensor is arranged on one side of the grounding wire and located at the bottom of the inner side of the box body, a current sensor is arranged on one side of the lower end of the grounding wire and located on the outer side of the box body, an extrusion device is arranged above the straight-through CT sensor and located on the side wall of the box body, heat dissipation holes are formed in the two sides of the box body, and dustproof nets are laid on the heat dissipation holes. An alarm is arranged at the upper end of the box body and connected with the voltage detector, andan insulating sleeve is