This copper abrasive wear particle is from an oil sample collected from a 8400kVA transformer.
This transformer was reportedly gas blanketed and sealed. This particle is typical of abrasive
wear. The "corkscrew" shape indicates the surface was open, not in contact with another conforming
surface. The bright particle to the right of the copper particles is degraded paper fiber, as can
seen by the presence of the characteristic dark banding caused by depolymerization of the cellulose.
The particle at the lower left is a mineral grain.
Transmitted Oblique Crossed Circular Polarized Light and Darfield Reflected light Illumination
Significance in the Environment: