Current transformer polarity verification

One or more computer storage media storing instructions that when executed by one or more computers cause the one or more devices to the processing device to perform operations to determine a polarity verification of current transformer for a protected device that includes at least one input power leg coupled to an electronic sensor device by a respective current transformer, the respective current transformer having a first primary node, a second primary node, a first secondary node, and a second secondary node, the operations comprising:

• injecting a first test current into the first primary node of the respective current transformer to induce a second test current in the first secondary node of the respective current transformer;
• monitoring a flow direction of the second test current at a first node and a second node of the electronic sensor device;
• determining a polarity verification result for the respective current transformer by comparing the monitored flow direction of the second test current to a pre-programmed signature designation associated with the electronic sensor device;
• and
• in response to determining a negative verification result based on the comparison, changing a pre-defined configuration of the electronic sensor device to correct a polarity orientation of the respective current transformer.