Frequency Response Analysis: An Enabling Technology to Detect Internal Faults within Critical Electric Assets

Frequency Response Analysis (FRA) technique has been recognized by worldwide utilities as a matured technology to assess the mechanical integrity of power transformers. While some industrial critical assets such induction motors have same construction principle transformers, application FRA not yet fully explored. This paper presents analogical experimental studies for on transformers and motors. For consistent analogy, employed detect short open circuit turns in both appliances, which helps explore wider scope applications rotating machines. In this regard, measurements are performed an 11/0.415 kV, 500 kVA, three-phase distribution transformer 5.5 HP motor. Several faults staged windings tested equipment signature is recorded compared with reference at no fault. To quantify impact signature, several statistical indicators used threshold limits these proposed automate interpretation process. Results reveal good correlation between signatures that attests feasibility using various within large