What gets tested before shipping
● No-load run: voltage, current, and vibration across all three phases
● Insulation resistance and polarization index: winding soundness over a sustained test
● Surge comparison: catches weak turn-to-turn insulation a megohm test can miss
● Vibration signature: a baseline for future comparison
Why it matters
It's documented proof of workmanship behind NEMA MG-1 and EASA AR100 quality standards, not a verbal assurance. If a warranty question comes up later, the report shows exactly what shipped, not what anyone remembers months later.
The use most people miss
A single reading tells you condition on one day. Compared against the report's baseline, it tells you a trend, and trends are what let a team catch degrading insulation before it becomes an unplanned outage. That's the difference between condition-based maintenance and just waiting for something to fail.
Where it should live
The report is only useful if it's findable. Attaching it to the asset's maintenance record, alongside the motor's serial number and installation date, means the next technician who tests that motor has something real to compare against instead of guessing whether a reading looks normal.
BOTTOM LINE Keep the report in the asset file, not an inbox. It's worth more the next time that motor gets tested
