EP0049642B1 - Gas insulated electrical apparatus - Google Patents
Gas insulated electrical apparatus Download PDFInfo
- Publication number
- EP0049642B1 EP0049642B1 EP19810304666 EP81304666A EP0049642B1 EP 0049642 B1 EP0049642 B1 EP 0049642B1 EP 19810304666 EP19810304666 EP 19810304666 EP 81304666 A EP81304666 A EP 81304666A EP 0049642 B1 EP0049642 B1 EP 0049642B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transformer
- switchgear
- gas
- chamber
- electrical apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
Definitions
- a gas insulated electrical apparatus having a power transformer and switchgear, the latter comprising a circuit breaker, a disconnecting switch, an instrument current transformer, and instrument voltage transformer, a ground switch and the like disposed in separate housings, and with the two devices connected externally via bushings.
- the known apparatus has the disadvantage that its structure is large and complicated, and therefore expensive.
- British patent specification 1036101 discloses a dry flame-proof transformer with a tank, and a vacuum circuit breaker in a casing attached to the transformer tank, for use in mines or in an explosive atmosphere. Vacuum circuit breakers are however costly and unsuitable for general use particularly in high-power distribution apparatus.
- the object of the present invention is to improve the known gas-insulated transformer and switchgear apparatus, to provide a more compact and less expensive construction.
- a gas-insulated electrical apparatus which comprises a transformer and switchgear for connection between the transformer and electrically conductive supply lines, a transformer enclosure and a switchgear enclosure attached thereto, characterised in that the transformer enclosure and the switchgear enclosure are merged to form a single sealed housing which is divided by an internal partition into a transformer chamber and a switchgear chamber, in such a manner that it is possible to inspect the transformer and the switchgear separately, the transformer chamber is filled with SF 6 insulating gas, and the switchgear chamber is filled with SFs gas or air which insulates the switchgear. It is particularly advantageous if the transformer chamber is filled with the SF 6 gas, which insulates the transformer, and the switchgear chamber is filled with atmospheric air which insulates the switchgear, to facilitate inspection of the switchgear.
- transformer coils 1 are wound on a magnetic core 2.
- a sealed housing 3 contains the transformer coils 1, and is filled with an insulating gas such as SF 6 gas.
- Switchgear 4 is connected between the transformer coil 1 and a power cable 5.
- the switchgear 4 comprises a circuit breaker 401 and a disconnecting switch 402 which function to connect or disconnect the transformer coil - 1 and the power cable 5, an instrument current transformer 403 which detects the current flowing through the transformer coil 1, an instrument voltage transformer 404 which detects the voltage applied to the transformer coil 1, and a ground switch 405 which earths the.
- a second sealed housing 6 contains the switchgear 4, and is filled with an insulating gas such as SF 6 gas.
- a bushing 7 is mounted on the second sealed housing 6 so as to pass through a wall thereof, and functions to connect an end 501 of the power cable 5 to the switchgear 4.
- a cable box 8 constructed of a metal material such as sheet iron, is mounted on the second sealed housing 6. The cable box 8 functions to protect the cable end 501 from dust etc., and also to prevent live parts such as the cable 501 from being physically exposed, thereby to prevent electric shock accidents.
- a bushing 9 is mounted on the second sealed housing 6 so as to pass through a wall thereof, while a primary bushing 10 is mounted on the first sealed housing 3 so as to pass through the wall thereof.
- a conductor 11 is connected between the bushing 9 and the primary bushing 10, and functions to connect the switchgear 4 to the transformer coils 1.
- a conduit or duct 12 constructed of a metal material such as sheet iron, contains the conductor 11 therein.
- the duct 12 has its two end parts mounted on the first and second sealed vessels 3 and 6, to protect the conductor 11 etc. from dust, etc. and also to prevent live parts such as the conductor 11 from being physically exposed, thereby to prevent electric shock accidents.
- a secondary bushing 13 is mounted on the first sealed housing 3 so as to pass through a wall thereof, and functions to pass electric power transformed by the transformer coils 1.
- Electric power supplied by the power cable 5 is applied to the transformer coils 1 through the switchgear 4, and is transformed by these transformer coils 1. Thereafter, the transformed power is passed via the secondary bushings 13.
- the conventional gas insulated electrical apparatus thus constructed requires there to be the duct 12 which contains the conductor 11, that is to say the connection 2 between the transformer coil 1 and the switchgear 4, and the primary bushing 10 and the bushing 9 which are respectively mounted on the first and second sealed housings 3 and 6 so as to pass through the walls thereof.
- This invention has been made in order to eliminate the disadvantages of the prior art as stated above, and provides an SF 6 gas insulated electrical apparatus in which the switchgear 4 and the transformer coils 1 are contained in a single sealed housing, whereby the apparatus is rendered small in size as compared with the prior art apparatus.
- FIG 3 is a side view showing an embodiment of an SF 6 gas insulated electrical apparatus according to this invention.
- portions corresponding to those in Figure 1 are respectively assigned the same reference numerals.
- the transformer coils 1 and the switchgear 4 are contained in the single sealed housing 3a, and the transformer coil 1 and the switchgear 4 are connected directly. Accordingly, the duct 12 and the primary bushing 10 as well as the bushing 9 in the conventional apparatus shown in Figure 1 are not required, and the apparatus can be made relatively small in size.
- a partition wall 14 is mounted inside the sealed housing 3a and divides the interior of this sealed housing into a first chamber 3a1 on the side of the transformer coils 1 and a second chamber 3a2 on the side of the switchgear 4.
- a housing 15 is mounted on the partition wall 14, and functions to connect the switchgear 4to the transformer coil 1.
- the division of the sealed housing 3a into a first and second chambers 3a1 and 3a2 by the partition wall 14 makes it possible to inspect the transformer coils 1 and the switchgear 4 separately.
- the inspection of the switchgear 4 can be further facilitated by filling only the first chamber 3a1 with SF 6 gas and insulating the second chamber 3a2 with atmospheric air.
- the transformer coils and the switchgear are contained in a single sealed housing, so the apparatus can be made relatively small in size and the bus ducts in the conventional apparatus can be dispensed with, thereby reducing the overall cost of the apparatus.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Description
- This invention relates to a gas insulated electrical apparatus.
- A gas insulated electrical apparatus is known having a power transformer and switchgear, the latter comprising a circuit breaker, a disconnecting switch, an instrument current transformer, and instrument voltage transformer, a ground switch and the like disposed in separate housings, and with the two devices connected externally via bushings.
- The known apparatus has the disadvantage that its structure is large and complicated, and therefore expensive.
- British patent specification 1036101 discloses a dry flame-proof transformer with a tank, and a vacuum circuit breaker in a casing attached to the transformer tank, for use in mines or in an explosive atmosphere. Vacuum circuit breakers are however costly and unsuitable for general use particularly in high-power distribution apparatus.
- The object of the present invention is to improve the known gas-insulated transformer and switchgear apparatus, to provide a more compact and less expensive construction.
- According to the present invention there is provided a gas-insulated electrical apparatus which comprises a transformer and switchgear for connection between the transformer and electrically conductive supply lines, a transformer enclosure and a switchgear enclosure attached thereto, characterised in that the transformer enclosure and the switchgear enclosure are merged to form a single sealed housing which is divided by an internal partition into a transformer chamber and a switchgear chamber, in such a manner that it is possible to inspect the transformer and the switchgear separately, the transformer chamber is filled with SF6 insulating gas, and the switchgear chamber is filled with SFs gas or air which insulates the switchgear. It is particularly advantageous if the transformer chamber is filled with the SF6 gas, which insulates the transformer, and the switchgear chamber is filled with atmospheric air which insulates the switchgear, to facilitate inspection of the switchgear.
- The invention will be further described, by way of example only, with reference to the accompanying drawings in which:
- Figure 1 is a side view showing a prior-art gas insulated electrical apparatus;
- Figure 2 is a schematic circuit diagram of the electrical apparatus shown in Figure 1; and
- Figure 3 is a side view showing an embodiment of a gas insulated electrical apparatus according to this invention.
- Referring to Figures 1 and 2,
transformer coils 1 are wound on amagnetic core 2. A sealed housing 3 contains thetransformer coils 1, and is filled with an insulating gas such as SF6 gas. Switchgear 4 is connected between thetransformer coil 1 and apower cable 5. Theswitchgear 4 comprises acircuit breaker 401 and a disconnectingswitch 402 which function to connect or disconnect thetransformer coil -1 and thepower cable 5, an instrumentcurrent transformer 403 which detects the current flowing through thetransformer coil 1, aninstrument voltage transformer 404 which detects the voltage applied to thetransformer coil 1, and aground switch 405 which earths the. transformercoil 1. A second sealed housing 6 contains theswitchgear 4, and is filled with an insulating gas such as SF6 gas. A bushing 7 is mounted on the second sealed housing 6 so as to pass through a wall thereof, and functions to connect anend 501 of thepower cable 5 to theswitchgear 4. Acable box 8 constructed of a metal material such as sheet iron, is mounted on the second sealed housing 6. Thecable box 8 functions to protect thecable end 501 from dust etc., and also to prevent live parts such as thecable 501 from being physically exposed, thereby to prevent electric shock accidents. - A bushing 9 is mounted on the second sealed housing 6 so as to pass through a wall thereof, while a
primary bushing 10 is mounted on the first sealed housing 3 so as to pass through the wall thereof. A conductor 11 is connected between the bushing 9 and theprimary bushing 10, and functions to connect theswitchgear 4 to thetransformer coils 1. A conduit orduct 12 constructed of a metal material such as sheet iron, contains the conductor 11 therein. In addition, theduct 12 has its two end parts mounted on the first and second sealed vessels 3 and 6, to protect the conductor 11 etc. from dust, etc. and also to prevent live parts such as the conductor 11 from being physically exposed, thereby to prevent electric shock accidents. Asecondary bushing 13 is mounted on the first sealed housing 3 so as to pass through a wall thereof, and functions to pass electric power transformed by thetransformer coils 1. - Electric power supplied by the
power cable 5 is applied to thetransformer coils 1 through theswitchgear 4, and is transformed by thesetransformer coils 1. Thereafter, the transformed power is passed via thesecondary bushings 13. - The conventional gas insulated electrical apparatus thus constructed requires there to be the
duct 12 which contains the conductor 11, that is to say theconnection 2 between thetransformer coil 1 and theswitchgear 4, and theprimary bushing 10 and the bushing 9 which are respectively mounted on the first and second sealed housings 3 and 6 so as to pass through the walls thereof. This has led to the disadvantage that the overall dimensions of the apparatus become large. - This invention has been made in order to eliminate the disadvantages of the prior art as stated above, and provides an SF6 gas insulated electrical apparatus in which the
switchgear 4 and thetransformer coils 1 are contained in a single sealed housing, whereby the apparatus is rendered small in size as compared with the prior art apparatus. - Figure 3 is a side view showing an embodiment of an SF6 gas insulated electrical apparatus according to this invention. In the figure, portions corresponding to those in Figure 1 are respectively assigned the same reference numerals.
- The
transformer coils 1 and theswitchgear 4 are contained in the single sealedhousing 3a, and thetransformer coil 1 and theswitchgear 4 are connected directly. Accordingly, theduct 12 and theprimary bushing 10 as well as the bushing 9 in the conventional apparatus shown in Figure 1 are not required, and the apparatus can be made relatively small in size. - A partition wall 14 is mounted inside the sealed
housing 3a and divides the interior of this sealed housing into a first chamber 3a1 on the side of thetransformer coils 1 and a second chamber 3a2 on the side of theswitchgear 4. Ahousing 15 is mounted on the partition wall 14, and functions to connect the switchgear 4to thetransformer coil 1. - More specifically, the division of the sealed
housing 3a into a first and second chambers 3a1 and 3a2 by the partition wall 14 makes it possible to inspect thetransformer coils 1 and theswitchgear 4 separately. Moreover, the inspection of theswitchgear 4 can be further facilitated by filling only the first chamber 3a1 with SF6 gas and insulating the second chamber 3a2 with atmospheric air. - As set forth above, according to this invention, the transformer coils and the switchgear are contained in a single sealed housing, so the apparatus can be made relatively small in size and the bus ducts in the conventional apparatus can be dispensed with, thereby reducing the overall cost of the apparatus.
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55140744A JPS5765207A (en) | 1980-10-07 | 1980-10-07 | Gas insulated substation |
JP140744/80 | 1980-10-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0049642A1 EP0049642A1 (en) | 1982-04-14 |
EP0049642B1 true EP0049642B1 (en) | 1985-05-02 |
Family
ID=15275705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19810304666 Expired EP0049642B1 (en) | 1980-10-07 | 1981-10-07 | Gas insulated electrical apparatus |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0049642B1 (en) |
JP (1) | JPS5765207A (en) |
DE (1) | DE3170311D1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5130616A (en) * | 1990-11-13 | 1992-07-14 | Southwest Electric Company | Motor control system and components thereof |
US5216356A (en) * | 1990-11-13 | 1993-06-01 | Southwest Electric Company | Shielded three phase transformer with tertiary winding |
EP0822632B1 (en) * | 1991-08-23 | 2002-01-16 | Mitsubishi Denki Kabushiki Kaisha | Power package for a power distribution system |
US5449991A (en) * | 1993-09-20 | 1995-09-12 | Southwest Electric Company | Motor control system and apparatus for providing desired three-phase voltage therein using a main transformer energized through an autotransformer |
EP1113549A1 (en) * | 1999-12-30 | 2001-07-04 | ABB T&D Technologies Ltd. | Electric substation |
EP1113546A1 (en) * | 1999-12-30 | 2001-07-04 | ABB T&D Technologies Ltd. | Electric substation |
EP1113547A1 (en) * | 1999-12-30 | 2001-07-04 | ABB T&D Technologies Ltd. | Electric substation |
EP1113548A1 (en) * | 1999-12-30 | 2001-07-04 | ABB T&D Technologies Ltd. | Electric substation |
DE102007057017A1 (en) * | 2007-11-23 | 2009-05-28 | Siemens Ag | Arrangement with a switching device and a transformer |
FI122254B (en) * | 2009-05-20 | 2011-10-31 | Sakari Peltoniemi | Electricity Distribution Construction |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2246318A (en) * | 1939-08-11 | 1941-06-17 | Westinghouse Electric & Mfg Co | Power transformer |
FR1097411A (en) * | 1954-03-26 | 1955-07-05 | Electr De Pierrefitte Atel | Mobile armored transformer station |
GB1036101A (en) * | 1961-04-20 | 1966-07-13 | Brush Electrical Eng | A flameproof transformer incorporating switchgear |
FR1297310A (en) * | 1961-05-19 | 1962-06-29 | Acec | Transformation cabin |
US3273053A (en) * | 1963-03-29 | 1966-09-13 | Jack W T Allen | Multiple connected transformer |
US3259808A (en) * | 1963-10-14 | 1966-07-05 | Mc Graw Edison Co | Ground level distribution transformer |
FR1428544A (en) * | 1964-12-31 | 1966-02-18 | Entpr Generale D Installations | New transformer station |
US3389302A (en) * | 1965-10-21 | 1968-06-18 | Wagner Electric Corp | Electrical inductive apparatus |
US3404247A (en) * | 1966-03-08 | 1968-10-01 | Gen Electric | Pressure responsive protective means for vacuum type circuit interrupters |
US3388299A (en) * | 1967-02-13 | 1968-06-11 | Sola Basic Ind Inc | Residential underground electric distribution assembly |
US3668351A (en) * | 1969-07-30 | 1972-06-06 | Kearney National Inc | Sectionalizing and protective apparatus for single house transformer |
JPS518181A (en) * | 1974-07-11 | 1976-01-22 | Nippon Asbestos Co Ltd | Kensakukakoseino yoitainetsutaimamoseisekimenrooruyosekimenkiban |
JPS5543691Y2 (en) * | 1976-06-28 | 1980-10-14 |
-
1980
- 1980-10-07 JP JP55140744A patent/JPS5765207A/en active Granted
-
1981
- 1981-10-07 DE DE8181304666T patent/DE3170311D1/en not_active Expired
- 1981-10-07 EP EP19810304666 patent/EP0049642B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3170311D1 (en) | 1985-06-05 |
JPS5765207A (en) | 1982-04-20 |
JPH0158725B2 (en) | 1989-12-13 |
EP0049642A1 (en) | 1982-04-14 |
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