Patent ID: 9188609
Filing Date: 2015-11-17
Classification: G01R

Abstract:
1. A current monitor, comprising: an internal monitor module configured to output a measurement of current for characterizing a real-time electric power quality of an external power network based on a received detection current, wherein a current of the external power network is detected by an external detection module so that the external detection module outputs a first level detection current; and an isolation and transfer module comprising an input side and an output side electrically isolated from each other, wherein the input side is configured to be connected with the external detection module, and the output side is configured to be connected with the internal monitor module, wherein the isolation and transfer module receives the first level detection current and outputs a second level detection current to the internal monitor module so as to reduce the impedance of the internal monitor module reflected to the external detection module; wherein the external detection module is an external current transformer, and the isolation and transfer module is an interconnecting current transformer, and wherein a turns ratio between a primary side and a secondary side of the interconnecting current transformer is less than a turns ratio between a primary side and a secondary side of the external current transformer.