Abstract: Electrical Signature Analysis (ESA) is a powerful prognostic and performance tool for analyzing electric machinery through the measurement of the effects on the magnetic field as observed in voltage and current. This white paper explores how various induction motor and load conditions affect the magnetic field and spectral characteristics of measured values. We will…
How Electrical and Current Signature Analysis is used with transformers to look at condition, waveforms, power quality, and condition including loose connections. Enjoy! Festures the use of the EMPATH and built in rules-based condition analysis.
In-place testing was performed on a 350 horsepower, 460 Vac, 1780 RPM vertical motor (Figure 1) and EMPATH detected conditions associated with bearings, rotor and early winding stress were indicated. The motor was removed for routine overhaul and the defects were investigated.
During a site visit along with Scott Burkhardt of #RDI, we were asked to investigate the cause of a noise from a casting mill. The DC motor operated the mill through two gearboxes then a slow speed shaft. Following #motionamplification on the first day, data was collected with an #EMPATH #electricalsignatureanalyzer from the DC drive. A comparison of operating speeds from the customer…
The EMPATH™ family of Electrical Signature and Motor Current Signature Analysis (ESA/MCSA) systems go well beyond analyzing electric motors, generators and wind turbines. It provides prognostic and time to failure estimation (TTFE) capabilities for AC/DC electric motors, synchronous machines, servo motors, machine tools, generators – including utility scale, and transformers. Not only will it identify…
In August 2020 I wrote an article for TheRamReview on the benefits surrounding Electrical Signature Analysis and it’s capabilities in viewing the entire system at one time (Regarding Reliability of Electric Motors: What Makes Electrical Signature Analysis Different? | THE RAM REVIEW ). In the past the discussion surrounding MCSA and ESA were such that…
Abstract— Two significant issues in wind power asynchronous generators are magnetic wedge loss and coil movement resulting in winding faults. Most of the time the failures occur unexpectedly or require borescope or visual inspections of the generator stators. In this paper we will identify how both conditions can be detected during operation through Electrical Signature…
Tested with the EMPATH® system from the base of the tower on a GE 1.xx ESS, bearing defects were found in the drive end bearing with the automated analysis. In this case study, we will show the voltage and current signatures, but not included are the kilo-Watt and torsional spectra used to determine severity. Following…
