Patent ID: 7510674

Claim:
A dielectric fluid comprising: one or more oil fractions having a T 90 â‰§950Â° F.; a kinematic viscosity between about 6 cSt and about 20 cSt at 100Â° C.; a pour point of â‰§âˆ’14Â° C.; wherein the one or more oil fractions comprise â‰§10 weight % molecules with monocycloparaffinic functionality, â‰¦3 weight % molecules with multicycloparaffinic functionality, and less than 0.30 weight % aromatics; wherein the one or more oil fractions has a Noack volatility of less than 5 weight %; and wherein the dielectric fluid has a dielectric breakdown of â‰§25 kV as measured by ASTM D877.