This particle is from an oil sample collected from a 8400kVA transformer. This transformer
was reportedly gas blanketed and sealed. The bright particle in the center of this image is
silicon carbide. Silicon carbide is a man-made abrasive. Its presence in this oil sample
indicates residual construction debris or debris from refurbishing surfaces in the transformer.
Transmitted Oblique Off Crossed Circular Polarized Light
Significance in the Environment: