(12) United States Patent (10) Patent No.: US 7,807,074 B2 Luly Et Al
US007807074 B2 (12) United States Patent (10) Patent No.: US 7,807,074 B2 Luly et al. (45) Date of Patent: Oct. 5, 2010 (54) GASEOUS DIELECTRICS WITH LOW Shiojiri, et al., Abstract of "Life cycle impact assessment of various GLOBAL WARMING POTENTIALS treatment scenarios for sulfur hexafluoride (SF6) used as an insulat ing gas”. Environmental Progress, 2006. 25(3), 218-227. (75) Inventors: Matthew H. Luly, Hamburg, NY (US); Shiojiri, et al., Abstract of "A Life cycle impact assessment study. On Robert G. Richard, Hamburg, NY (US) sulfur hexafluoride (SF6) used as a gas insulator', 2004, American Institute of Chemical Engineers, 005E/1-005E/9. (73) Assignee: Honeywell International Inc., Goshima, et al., Abstract of “Estimation of cross-sectional size of gas-insulated apparatus using hybrid insulation system with SF6 Morristown, NJ (US) substitute'. Gaseous Dielectrics X, 2004, pp. 253-258. Telfer, et al., Abstract of "A novel approach to power circuit breaker (*) Notice: Subject to any disclaimer, the term of this design for replacement of SF6”. Centre for Intelligent Monitoring patent is extended or adjusted under 35 Systems, Dept. of Electrical Engineering and Electronics, 2004, U.S.C. 154(b) by 803 days. 44(2), pp. 72-76. Gustavino, et al., Abstract of "Performance of glass RPC operated in (21) Appl. No.: 11/637,657 streamer mode with four-fold gas mixtures containing SF6, Nuclear Instruments & Methods in Physics Research, Section A: Accelera (22) Filed: Dec. 12, 2006 tors, Spectrometers, Detectors, and Associated Equipment, 2004, 517(1-3), pp. 101-108. (65) Prior Publication Data Diaz, et al., Abstract of “Effect of the percentage of SF6 (100%-10%- US 2008/O135817 A1 Jun.
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