EP0049642B1 - Gas insulated electrical apparatus - Google Patents

Gas insulated electrical apparatus Download PDF

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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
Application number
EP19810304666
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0049642A1 (en
Inventor
Teruo Ina
Tatsuo Sato
Atsushi Yamauchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0049642A1 publication Critical patent/EP0049642A1/en
Application granted granted Critical
Publication of EP0049642B1 publication Critical patent/EP0049642B1/en
Expired legal-status Critical Current

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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)
EP19810304666 1980-10-07 1981-10-07 Gas insulated electrical apparatus Expired EP0049642B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP140744/80 1980-10-07
JP55140744A JPS5765207A (en) 1980-10-07 1980-10-07 Gas insulated substation

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 (enrdf_load_stackoverflow)
JP (1) JPS5765207A (enrdf_load_stackoverflow)
DE (1) DE3170311D1 (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5216356A (en) * 1990-11-13 1993-06-01 Southwest Electric Company Shielded three phase transformer with tertiary winding
US5130616A (en) * 1990-11-13 1992-07-14 Southwest Electric Company Motor control system and components thereof
EP0598130B1 (en) * 1991-08-23 2001-02-21 Mitsubishi Denki Kabushiki Kaisha Distribution apparatus
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
EP1113547A1 (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
EP1113548A1 (en) * 1999-12-30 2001-07-04 ABB T&D Technologies Ltd. Electric substation
EP1113549A1 (en) * 1999-12-30 2001-07-04 ABB T&D Technologies Ltd. Electric substation
DE102007057017A1 (de) * 2007-11-23 2009-05-28 Siemens Ag Anordnung mit einem Schaltgerät und einem Transformator
FI122254B (fi) * 2009-05-20 2011-10-31 Sakari Peltoniemi Sähkönjakelurakenne

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2246318A (en) * 1939-08-11 1941-06-17 Westinghouse Electric & Mfg Co Power transformer
FR1097411A (fr) * 1954-03-26 1955-07-05 Electr De Pierrefitte Atel Poste de transformation blindé mobile
GB1036101A (en) * 1961-04-20 1966-07-13 Brush Electrical Eng A flameproof transformer incorporating switchgear
FR1297310A (fr) * 1961-05-19 1962-06-29 Acec Cabine de transformation
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 (fr) * 1964-12-31 1966-02-18 Entpr Generale D Installations Nouveau poste de transformation
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
JPS5543691Y2 (enrdf_load_stackoverflow) * 1976-06-28 1980-10-14

Also Published As

Publication number Publication date
DE3170311D1 (en) 1985-06-05
EP0049642A1 (en) 1982-04-14
JPH0158725B2 (enrdf_load_stackoverflow) 1989-12-13
JPS5765207A (en) 1982-04-20

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