Source: http://www.google.com/patents/US6324891?dq=7,328,163
Timestamp: 2017-03-23 10:35:16
Document Index: 534538820

Matched Legal Cases: ['art 90', 'art 95', 'art 90', 'art 95', 'art 95', 'art 90']

Patent US6324891 - Method and apparatus for monitoring GAS(ES) in a dielectric fluid - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn apparatus for monitoring one or more gas components in a fluid wherein either a) a sample gas obtained from the fluid is enriched in at least one target gas which is to be subjected to analysis; b) at least one target gas which is to be subjected to analysis is separated from a sample gas obtained...http://www.google.com/patents/US6324891?utm_source=gb-gplus-sharePatent US6324891 - Method and apparatus for monitoring GAS(ES) in a dielectric fluidAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6324891 B1Publication typeGrantApplication numberUS 09/270,462Publication dateDec 4, 2001Filing dateMar 15, 1999Priority dateApr 14, 1998Fee statusLapsedAlso published asCA2235021A1, CA2235021C, CN1218176C, CN1263597A, DE69926845D1, DE69926845T2, EP0988543A1, EP0988543B1, WO1999053314A1Publication number09270462, 270462, US 6324891 B1, US 6324891B1, US-B1-6324891, US6324891 B1, US6324891B1InventorsJean-Pierre Gibeault, Bernard Noirhomme, Renyan QinOriginal AssigneeGeneral Electric CompanyExport CitationBiBTeX, EndNote, RefManPatent Citations (11), Referenced by (9), Classifications (12), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetMethod and apparatus for monitoring GAS(ES) in a dielectric fluid
US 6324891 B1Abstract
What is claimed is: 1. A system for detecting at least one target gas from a sample gas of a dielectric fluid of an electrical system, the system for detecting comprising:
at least one gas extraction cavity that receives the dielectric fluid, the dielectric fluid may comprise the sample gas and target gas; at least one gas analysis detector that generates a signal if the at least one gas analysis detector is in contact with the target gas; at least one fluid communication member that connects the at least one gas extraction cavity to the at least one gas analysis detector to communicate the sample gas from the gas extraction cavity to the gas analysis detector; at least one gas elimination means connected to the at least one fluid communication member for permitting extraneous gases other than the target gas to diffuse therethrough to an elimination chamber; a reading system for interpreting signals from the at least one gas analysis detector that can detect the target gas; wherein each gas analysis detector comprises: a detector housing; a detector membrane disposed in the detector housing dividing the detector housing into an extraction housing side and a detection housing side, the detection housing side being in communication with the at least one gas analysis detector, the detector membrane permitting the target gas to pass therethrough, whereby: a target gas that is present in sample gas of a dielectric fluid from of an electrical system can pass from the at least one extraction cavity through the at least one fluid communication member to the at least one gas analysis detector that generates signals representative of the target gas for interpretation by the reading system. 2. The system according to claim 1, wherein the at least one gas extraction cavity comprises a gas-permeable membrane, the gas-permeable membrane allowing the sample gas to be separated from the dielectric fluid of the electrical system.
at least one gas extraction cavity that receives the dielectric fluid, the dielectric fluid may comprise the sample gas and target gas; at least one gas analysis detector that generates a signal if the at least one gas analysis detector is in contact with the target gas; at least one fluid communication member that connects the at least one gas extraction cavity to the at least one gas analysis detector to communicate the sample gas from the gas extraction cavity to the gas analysis detector; at least one gas elimination means connected to the at least one fluid communication member for permitting extraneous gases other than the target gas to diffuse therethrough to an elimination chamber; a reading system for interpreting signals from the at least one gas analysis detector that can detect the target gas; wherein each gas analysis detector comprises: a detector housing; a detector membrane disposed in the detector housing dividing the detector housing into an extraction housing side and a detection housing side, the detection housing side being in communication with the at least one gas analysis detector, the detector membrane permitting the target gas to pass therethrough, whereby: a target gas that is present in sample gas of a dielectric fluid from of an electrical system can pass from the at least one extraction cavity through the at least one fluid communication member to the at least one gas analysis detector that generates signals representative of the target gas for interpretation by the reading system; and wherein the at least one gas extraction cavity comprises a gas-permeable membrane, the gas-permeable membrane allowing the sample gas to be separated from the dielectric fluid of the electrical system. 11. A method for detecting at least one target gas from a sample gas of a dielectric fluid of an electrical system using the system of claim 1.
CH4 C2H6 CO
C2H4 C2H2 CO2 RH %
100% 100% —
100% TABLE B
100% 100% 10 hrs
100% 100% If the gas component to be eliminated from an extracted gas sample is hydrogen, the gas permeable element of the gas elimination means may for example be a suitable membrane of a material such as teflon, palladium, a hydrogen porous ceramic, etc.
Extraction membranes
Elimination membrane
Teflon (.25 mil)
Palladium on frit disc
FIG. 7b is a schematic end view representations of the extractor part shown in FIG. 7a; FIG. 8a, is a schematic cross sectional representation of a gas removal or eliminator part gas removal or eliminator part of the two part housing shown in FIG. 6; and
FIG. 8b is a schematic end view representations of the gas removal or eliminator part shown in FIG. 8a. Referring to FIG. 1, a gas monitoring apparatus in accordance with the present invention, generally designated by the reference numeral 1, is shown as being more or less direct connected to the housing wall 2 of an electric transformer system (e.g. there is no intervening valve member); only a portion of the wall 2 is shown along with a portion of a dielectric liquid 3. The dielectric liquid 3 is disposed within the transformer housing.
FIG. 5 shows an alternate configuration for a gas monitoring apparatus which is direct connected to the housing wall 2, i.e. see FIG. 1. The gas monitoring apparatus is similar to that shown FIG. 3. For example, the apparatus has an extraction membrane 7 c having a transformer side 8 c and a cavity side 9 c However, the apparatus has only a single gas extraction means 12 and is provided with a suitable gas pump 84 and a gas loop circuit 85 about which the sample gas is circulated in the direction of the arrow 86 from the gas cavity 11 c past the gas extraction means 90 and single analysis detector 12 back to the gas cavity 11 c. The extraction means 90 has an elimination membrane 92. The use of a pump allows for the exploitation of a relatively large extraction cavity 11 c. FIGS. 6, 7 a, 7, 8 a and 8 b illustrate in schematic fashion a two part housing for another example gas detector apparatus in accordance with the present invention. The housing has a gas extractor part 90 and a gas removal or eliminator part 95. The gas extractor part 90 has a gas permeable extraction membrane 97. The gas removal or eliminator part 95 has a gas permeable elimination or removal membrane 98. The membranes 97 and 98 may beheld in place in any suitable manner, e.g. by an adhesive. As may be seen from FIG. 6 the eliminator part 95 is sized to slidingly fit within the extractor part 90 so as to be able to define a gas chamber 100.
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