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US 5,252,778 AGranted
Gas-insulated electric apparatus
AssigneeKabushiki Kaisha Toshiba
InventorNaoya Ogawa
Life of this patent
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Abstract
A gas-insulated transformer comprises a transformer body and a radiator both filled with SF.sub.6 gas. The radiator comprises a gas introducing header, a gas discharging header, a plurality of radiation panels, and couplers for coupling the gas introducing header, gas discharging header and radiation panels. The coupler has a passageway having a cross section area gradually increasing from an end portion of the radiation panel towards the header.
Claims22
A gas-insulated electric apparatus comprising:
- an electric apparatus body including
- a storing space,
- an electric element to be insulated, the electric element housed in the storing space, and
- a high withstand voltage insulating gas filled in the storing space;
- and
- a radiator for cooling the high withstand voltage insulating gas, including
- at least one gas introducing header connected to the electric apparatus body, for introducing the high withstand voltage insulating gas from the electric apparatus body,
- at least one gas discharging header connected to the electric apparatus body, for discharging the high withstand voltage insulating gas to the electric apparatus body,
- at least one gas radiation member having a panel shape, having one open end portion directly or indirectly connected to the at least one gas introducing header, having the other open end portion directly or indirectly connected to the at least one gas discharging header, and having a gas passageway having a plurality of passageways formed along a longitudinal axis of the at least one gas radiation member, and separated from each other along the transverse axis of the gas radiation member, the at least one gas radiation member receiving the high withstand voltage insulating gas from the at least one gas introducing header, cooling the received high withstand voltage insulating gas by radiation, and discharging the cooled high withstand voltage insulating gas to the at least one gas discharging header, and
- at least one coupler interposed in at least one of a first connection portion between one end portion of the at least one gas radiation member and the at least one gas introducing header and at least another coupler interposed in at least one of a second connecting portion between the other end portion of the at least one gas radiation member and the at least one gas discharging header, said one and other couplers passing the high withstand voltage insulating gas through, said one and other couplers having a passageway with a shape of cross section area gradually varying from said one and other portions of the at least one gas radiation member towards the at least one of the first and second connecting portion, each passageway with a thickness gradually increasing from said one and other end portions of the at least one gas radiation member towards the at least one of the first and second connecting portion.
7 more elements
The gas-insulated electric apparatus comprising:
- an electric apparatus body including
- a storing space,
- an electric element to be insulated, the electric element housed in the storing space, and
- a high withstand voltage insulating gas filled in the storing space;
- and
- a radiator for cooling the high withstand voltage insulating gas, including
- at least one gas introducing header connected to the electric apparatus body, for introducing the high withstand voltage insulating gas from the electric apparatus body, the at least one gas introducing having a plurality of ducts arranged along the longitudinal axis of the at least one gas introducing header,
- at least one gas discharging header connected to the electric apparatus body, for discharging the high withstand voltage insulating gas to the electric apparatus body, the t least one gas discharging header having a plurality of ducts arranged along the longitudinal axis of the at least one gas discharging header,
- at least one gas radiation member having a panel shape, having one open end portion directly or indirectly connected to the at least one gas introducing header, having the other open end portion directly or indirectly connected to the at least one gas discharging header, and having a gas passageway having a predetermined passageway cross section area along the longitudinal axis of the at least one gas radiation member, the at least one gas radiation member receiving the high withstand voltage insulating gas from the at least one gas introducing header, cooling the received high withstand voltage insulating gas by radiation, and discharging the cooled high withstand voltage insulating gas to the at least one gas discharging header, and
- varying means arranged in at least one of the at least one gas introducing header and the at least one gas discharging header, for varying the passageway cross section area in at least one of the at least one gas introducing header and the at least one gas discharging header, so as to make the flow rate at the passageway along the transverse axis of the at least one gas radiation member uniform.
7 more elements
In a gas-insulated electric apparatus comprising:
- an electric apparatus body including
- a storing space,
- an electric element to be insulated, the electric element housed in the storing space, and
- a high withstand voltage insulating gas filled in the storing space;
- and
- a radiator for cooling the high withstand voltage insulating gas, including
- at least one gas radiation member having a panel shape, having a gas passageway having a predetermined passageway cross section area along the longitudinal axis of the at least one gas radiation member,
- at least one gas introducing header connected to the electric apparatus body, for introducing the high withstand voltage insulating gas from the electric apparatus body, the at least one gas introducing header having a predetermined passageway cross section area, being inserted in the vicinity of one longitudinal end portion of the at least one gas radiation member, and having a duct at a portion crossing the at least one gas radiation member,
- at least one gas discharging header connected to the electric apparatus body, for discharging the high withstand voltage insulating gas to the electric apparatus body, the at least one gas discharging header having a predetermined passageway cross section area, being inserted in the vicinity of the other longitudinal end portion of the at least one gas radiation member, and having a duct at a portion crossing the at least one gas radiation member,
- the improvement wherein at least one of the transverse dimension of the at least one gas introducing header and the transverse dimension of the at least one gas discharging header is equal to or lower than the value obtained by multiplying the transverse dimension of the at least one gas radiation member by 0.36, and the passageway cross section area in at least one of the at least one gas introducing header and the at least one gas discharged header is equal to or greater than the area of a circle having a diameter equal to a value obtained by multiplying the transverse dimension of the at least one gas radiation member by 0.25.
7 more elements
In a gas-insulated electric apparatus comprising
- an electric apparatus body including
- a storing space,
- an electric element to be insulated, the electric element housed in the storing space, and
- a high withstand voltage insulating gas filled in the storing space;
- and
- a radiator for cooling the high withstand voltage insulating gas, including
- at least one gas radiation member having a panel shape, having a gas passageway having a predetermined passageway cross section area along the longitudinal axis of the at least one gas radiation member,
- at least one gas introducing header for introducing the high withstand voltage insulating gas from the electric apparatus body, the at least one gas introducing header having a predetermined passageway cross section area, being inserted in the vicinity of one longitudinal end portion of the at least one gas radiation member, and having a duct at a portion crossing the at least one gas radiation member,
- at least one gas discharging header for discharging the high withstand voltage insulating gas to the electric apparatus body, the at least one gas discharging header having a predetermined passageway cross section area, being inserted in the vicinity of the other longitudinal end portion of the at least one gas radiation member, and having a duct at a portion crossing the at least one gas radiation member,
- the improvement wherein at least one of the at least one gas introducing header and the at least one gas discharging header is situated near a transverse end portion of the at least one gas radiation member.
7 more elements
In a gas-insulated electric apparatus comprising:
- an electric apparatus body including
- a storing space,
- an electric element to be insulated, the electric element housed in the storing space, and
- a high withstand voltage insulating gas filled in the storing space;
- and
- a radiator for cooling the high voltage withstand voltage insulating gas, including
- at least one gas radiation member having a panel shape, having a gas passageway having a predetermined passageway cross section area along the longitudinal axis of the at least one gas radiation member,
- at least one gas introducing header for introducing the high withstand voltage insulating gas from the electric apparatus body, the at least one gas introducing header having a predetermined passageway cross section area, being inserted in the vicinity of one longitudinal end portion of the at least one gas radiation member, and having a duct at a portion crossing the at least one gas radiation member,
- at least one gas discharging header for discharging the high withstand voltage insulating gas to the electric apparatus body, the at least one gas discharging header having a predetermined passageway cross section area, being inserted in the vicinity of one longitudinal end portion of the at least one gas radiation member, and having a duct at a portion crossing the at least one gas radiation member,
- the improvement wherein at least one of the at least one gas introducing header and the at least one gas discharging header has such a cross-sectional shape as to reduce the passage resistance to air rising on the outside of the at least one gas radiation member.
7 more elements
Dependencies are inferred from the claim text.