Electrical Signature Analysis (ESA) is an on-line test method where voltage and current waveforms are captured while the motor system is running and then, via a Fast Fourier Transform (FFT), a spectral analysis is done by the provided software.
From this FFT, faults related to incoming power, the control circuit, the motor itself, and the driven load are detected and can then be trended for Condition Based Maintenance/Predictive Maintenance purposes. Our particular ESA instrument is handheld, portable and battery operated.
Download the FREE PDF On-Line Electrical Motor Testing 101 by clicking the link below (required PDF Acrobat Reader)