Patent application number | Description | Published |
20080223498 | Method for extending long-term electrical power cable performance - An improved method for imparting excellent long-term dielectric performance to an in-service electrical cable section having a stranded conductor surrounded by a conductor shield encased in a polymeric insulation and having an interstitial void volume in the region of the conductor, the cable section having an average operating temperature T. The method comprising injecting a dielectric enhancement fluid composition into the interstitial void volume, the composition comprising at least one component selected from:
| 09-18-2008 |
20090133799 | METHOD FOR RESTORING POWER CABLES - A method for extending the useful life of an in-service electrical cable section having a stranded conductor surrounded by a conductor shield encased in a polymeric insulation jacket and having an interstitial void volume in the region of the conductor, the cable section having an average conductor temperature T. The method comprising (i) continuously introducing a non-condensing exclusion fluid into the interstitial volume, the exclusion fluid comprising at least one non-condensing exclusion component having a solubility in the insulation polymer at least 100 times the corresponding solubility of water, each solubility being determined at temperature T; and (ii) injecting a condensing dielectric enhancement fluid into the interstitial void volume, wherein the dielectric enhancement fluid has a virtual flow rate within the interstitial void volume of less than about 0.1 liter per hour. | 05-28-2009 |
20090176960 | METHOD FOR EXTENDING LONG-TERM ELECTRICAL POWER CABLE PERFORMANCE - An improved method for imparting excellent long-term dielectric performance to an in-service electrical cable section having a stranded conductor surrounded by a conductor shield encased in a polymeric insulation and having an interstitial void volume in the region of the conductor, the cable section having an average operating temperature T. The method comprising injecting a dielectric enhancement fluid composition into the interstitial void volume, the composition comprising at least one component selected from:
| 07-09-2009 |
20090203265 | SWAGABLE HIGH-PRESSURE CABLE CONNECTORS HAVING IMPROVED SEALING MEANS - A high-pressure connector for an electrical power cable section having a central stranded conductor encased in a polymeric insulation jacket and having an interstitial void volume in the region of the stranded conductor, the high-pressure connector being suited for confining a fluid within the interstitial void volume at a residual pressure above atmospheric, but below the elastic limit of the polymeric insulation jacket, the high-pressure connector comprising a housing having a wall defining an interior chamber configured to be in fluid communication with the interstitial void volume and an end portion sized to receive the insulation jacket within the interior chamber and to overlap at least a portion of the insulation jacket at an end thereof with the cable section extending from the housing end portion and at least a portion of the stranded conductor positioned within the interior chamber. The housing wall of the housing end portion has an engagement portion comprised of a swagable material to secure the housing wall to the insulation jacket in fluid-tight sealed engagement therewith upon inward swaging of the engagement portion of the housing wall of the housing end portion to the insulation jacket to confine the fluid at the residual pressure within the interior chamber and the interstitial void volume. The housing includes at least one axially-projecting engagement member located within the interior chamber at the engagement portion of the housing wall of the housing end portion. | 08-13-2009 |
20100070250 | SYSTEM AND METHOD FOR PREDICTING PERFORMANCE OF ELECTRICAL POWER CABLES - A computer simulation method is disclosed for simulating an electrical cable having a stranded conductor surrounded by a conductor shield encased in an insulation jacket and having an interstitial void volume in the region of the conductor injected with a fluid composition comprising at least one dielectric enhancement fluid component so as to at least partially fill the interstitial void volume at an initial time. The simulation method comprises for a selected length of the simulated cable, defining a plurality of radially arranged finite volumes extending the selected length of the simulated cable, and estimating the radial temperature of each finite volume. For a selected time period after the initial time, performing a series of steps at least once and outputting or otherwise using the value of the new concentration for the dielectric enhancement fluid component within each finite volume. | 03-18-2010 |
20100122453 | THERMALLY ENHANCED POWER CABLE REJUVENATION - A method for enhancing the dielectric properties of at least one in-service electrical cable section having a central stranded conductor encased in a polymeric insulation jacket and having an interstitial void volume in the region of the conductor. The method includes filling the interstitial void volume with at least one dielectric property-enhancing fluid and then confining the fluid within the interstitial void volume at a residual pressure greater than about 50 psig, with the pressure being imposed along the entire length of the cable section and being below the elastic limit of the insulation jacket. The cable section is heated by imposing a potential of no more than about 500 volts across the conductor during at least a portion of the time required to complete the other described steps. | 05-20-2010 |
20110244702 | RETICULATED FLASH PREVENTION PLUG - A connector for introducing fluid to an electrical cable affixed in a chamber internal to the connector, the connector comprising an injection port exposed to at least one exterior surface of the cable connector, wherein the injection port is in fluidic communication with the chamber, and a reticulated plug is positioned within an insulated segment of the injection port and sized to fill at least a portion thereof. The reticulated plug may be used in combination with various types of conventional injection connectors to allow swapping of an insulative permanent plug for an injection plug after a dielectric enhancement fluid has been introduced into the interior of a cable using the reticulated plug, wherein the cable is energized during the swapping operation. | 10-06-2011 |