Equipotential high-voltage current transformer

The utility model discloses a high-voltage current transformer used in an electric power system. An analog-digital conversion device is connected under the transformer body through a transformer secondary coil, after the analog-digital conversion to the secondary coil current is performed, the current is converted to light impulse through an insulation optical cable, and then connected to a low-voltage monitoring and controlling circuit. No high voltage is born between a primary coil and the secondary coil of the transformer, a high-voltage insulation layer is saved, and thereby cables and cable channels of transformer stations are greatly reduced. The equipment has small size, light weight, and simple manufacturing process, can replace an expensive and bulky high-voltage or extrahigh voltage current transformer, and reduces the cost.