Electronic current transformer of isolation circuit breaker

The invention discloses an electronic current transformer of an isolation circuit breaker. The electronic current transformer comprises a current transformer, a transformer shell, a remote electronic module, an optical fiber insulator and an optical fiber, wherein the current transformer is installed inside the transformer shell, an optical fiber cable penetrates through the optical fiber insulator, a signal input end of the remote electronic module is connected with a secondary winding side of the current transformer, and a signal output end of the remote electronic module is connected with the optical fiber cable. The electromagnetic interference resistance is strong, the application of a secondary cable of a transformer substation is reduced, the requirement of the technical development of a digitalized transformer substation can be met, the transformer-to-ground insulation performance is guaranteed, and the signal measuring accuracy is improved.