Powdered Paper
This is a particle of powdered paper from a transformer oil sample. Note that there are a number of individual paper fiber fragments that make up this particle.
Transmitted Off Crossed Circular Polarized Light and Reflected Darkfield Illumination
Definition/Function:
The paper insulation has reached end-of-life when the tensile strength of the individual paper fibers decreases to the point that it is below the strength of the bond between fibers in the paper insulation. At that point the paper "powders" as is the case with this paper particle.
Significance in the Environment:
The paper insulation is in jepardy when these powdered paper particles appear in the oil sample.
