Graphene Layering in Coke Deposit on LTC Contacts
This image shows the crystal structure density and
orientation of graphene in the coke deposit on
a Load Tap Changer (LTC) contact. The intensity of the blue or yellow shows the
degree of crystallinity while the blue
indicates that the omega refractive index is oriented NE-SW and yellow indicates the
omega refractive index is oriented NW-SE.
Reflected Crossed Polarized Light with Red Plate Compensator
Definition/Function:
Significance in the Environment:
The coking of LTC contacts can cause the connecting transformer to fail.
Characteristic Features:
Associated Particles:
References:
Savage, G., CARBON-CARBON COMPOSITES, Chapman & Hall, 1993
Presentation that discusses Coking in LTCs:
http://www.microlabnw.com/index/EPRIMarch7-2005.ppt