Patent ID: 9063178
Filing Date: 2015-06-23
Classification: G01R,Y10T

Abstract:
1. A current monitoring system comprising: a transformer comprising a primary winding; a conductor electrically coupled to the primary winding and configured to carry a first current passing through the primary winding; a current sensor configured to sense the first current passing through the conductor; a voltage conversion device coupled to the current sensor and configured to receive a second current from the current sensor and convert the second current into a first voltage; a first scaling circuit coupled to the voltage conversion device and configured to convert the first voltage to a second voltage proportional to the first current based on a first scaling factor; and a second scaling circuit coupled to the voltage conversion device and configured to convert the first voltage to a third voltage proportional to the first current based on a second scaling factor, wherein the second scaling factor is different from the first scaling factor; wherein the first scaling circuit monitors operation of the transformer for a steady-state operating condition; and wherein the second scaling circuit monitors operation of the transformer for an overload condition.