Current transformer power supply applied to intelligent switch

The utility model discloses a current transformer power supply applied to an intelligent switch. The current transformer power supply comprises a current transformer (CT), a current/voltage conversion circuit, a direct current/direct current (DC/DC) conversion circuit, a direct current/alternating current (DC/AC) conversion circuit, a battery charging circuit and a storage battery, wherein a primary winding of the current transformer is connected in series with a power transmission cable, and a secondary winding of the current transformer is connected with the input end of the current/voltage conversion circuit; and the output end of the current/voltage conversion circuit is connected with the DC/DC conversion circuit, the DC/AC conversion circuit and the battery charging circuit. The current transformer is used for supplying power to a feeder terminal unit (FTU) of the intelligent switch, and a structure and wiring are simplified. Energy is acquired from the current transformer, and is used as the working power of the FTU and the operating power of the switch, and energy required by an energy storage motor and communication transmission equipment can be provided.