Error detection device for current transformer

The utility model discloses an error detection device for a current transformer. The error detection device for the current transformer comprises a host, a test signal output terminal, a secondary signal input terminal and a primary signal input terminal, wherein a processor, a display and a man-machine interaction unit for setting test parameters are arranged in the host, and the display and the man-machine interaction unit are connected with the processor; one end of the test signal output terminal is connected with the processor, and the other end of the test signal output terminal is injected with test signals by being connected with a secondary winding of the tested current transformer; one end of the secondary signal input terminal is connected with the processor, and the other end of the secondary signal input terminal acquires feedback signals by being connected with the secondary winding of the current transformer; and one end of the primary signal input terminal is connected with the processor, and