Detection of circuit anomalies in current transformers

An intelligent electronic device configured to detect circuit anomalies in a current transformer, the device comprising:

• a measurement module configured to receive a current signal originating from the secondary winding of the current transformer and a voltage signal sourced from a primary conductor around which the current transformer is wound;
• a processor programmed to execute the following steps:
• comparing the frequency of the received current signal with the frequency of the received voltage signal, and advancing to a next step if the difference between the frequencies surpasses a predetermined frequency threshold;
• assessing the magnitude of the received current signal and advancing to a next step if the magnitude falls below a predetermined magnitude threshold;
• analyzing the Total Harmonic Distortion (THD) of the received current signal and contrasting it with a predetermined THD threshold, subsequently determining:
• an open circuit within the current transformer if the THD exceeds the predetermined THD threshold, a short circuit within the current transformer if the THD is below the predetermined THD threshold;
• a communication interface configured to trigger a protective action that includes isolating an affected section of a circuit to prevent further damage when either the open circuit or the short circuit within the current transformer is determined.