Output open circuit monitoring device of current transformer

The utility model discloses an output open circuit monitoring device of a current transformer. A current bus passes through the current transformer, an output end of the current transformer is connected with a metering device, a monitoring resistor of an output open circuit of the current transformer and an input end of a rectification silicon bridge are respectively connected with the output end of the current transformer in parallel, an output end of the rectification silicon bridge is connected with a wide-range power supply unit, and an alarm unit and a control unit are respectively connected with the wide-range power supply unit. The output open circuit monitoring device disclosed by the utility model can uninterruptedly monitor whether the output of the current transformer is opened or not in real time, an alarm signal and a control signal are given out to provide clear prompt for a user when the output of the current transformer is opened, and corresponding control operations can be implemented, and sa