Shielding-type anti-interference electric power secondary system

The utility model relates to anti-interference technology of a power system and specifically discloses a shielding-type anti-interference electric power secondary system. The shielding-type anti-interference electric power secondary system includes a secondary device with a load. The secondary device is connected with a primary device with a power source through a connection cable. At least one core wire is arranged in an external protection layer of the connection cable. An internal protection layer is wrapped in the core wire. A cable shielding layer is arranged inside the external protection layer. A core wire shielding layer is arranged inside the internal protection layer. According to the utility model, both of the core wire of the cable and the cable are equipped with the shielding layers, so that interference among core wires and external interference can be prohibited. Therefore, the improvement of the accuracy of data transmission can be facilitated.