Equipment Condition Assessment for Induction Motors

We conduct motor fleet assessments in tiers based on pre-established criticality rankings. For critical motors: insulation resistance testing at specified test voltage with temperature measurement and correction per IEEE 43, polarization index calculation, vibration measurement at all bearing locations with spectral analysis per ISO 10816, thermographic survey of power connections, terminal box, frame surface temperature distribution, and cooling system, bearing condition evaluation through vibration signature and temperature, nameplate verification including efficiency class (NEMA MG-1), and visual inspection of mounting, conduit, grounding, and enclosure integrity. For standard motors: vibration severity screening per ISO 10816, thermographic screening, visual inspection, and nameplate data collection. Each motor receives a condition grade (1-5). Critical motors receive additional reporting: remaining insulation life estimate based on measured and historical IR values, bearing condition rating, rewind-versus-replace recommendation with economic analysis per motor frame size and efficiency class, and specific repair recommendations with cost estimates. Fleet summary reports provide condition distribution by criticality tier, capital replacement prioritization, and maintenance action backlog for planning.