The THT-DKS (C) series three-phase grounding transformer is a special transformer that uses Z-type windings. For systems where the power transformer has no neutral point or the neutral point is not led out, the three-phase grounding transformer can be used to set the system neutral point when installing neutral grounding equipment. For newly built substations, the grounding transformer can be equipped with low-voltage windings according to the power demand of the station, and can also be used as a station transformer.