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Photographic gallery.  Thousands of particles under the microscope.

Particles from One Transformer

All of the particles that follow are from one 50 milliliter oil sample collected from a 8400 kVA Transformer. The transformer reportedly had a gas blanket and was sealed. The particles indicate otherwise. The large number of degraded paper fibers in this sample indicate severe degradation of the paper insulation and there is evidence of charring of the paper at some locations.

Diatomaceous Earth Diatomaceous Earth Degraded Paper Degraded Paper Degraded Paper Natural Minerals Natural Minerals Feldspar Copper Abrasive Wear Contact Wear Contact Wear Charred Paper Charred Paper Coke Mixed Particles Polymer Flake Paint Flake Silver Scuffing Wear Silicon Carbide Corn Starch