US3485971A - Fully enclosed switching devices for high voltages - Google Patents

Fully enclosed switching devices for high voltages Download PDF

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Publication number
US3485971A
US3485971A US737434A US3485971DA US3485971A US 3485971 A US3485971 A US 3485971A US 737434 A US737434 A US 737434A US 3485971D A US3485971D A US 3485971DA US 3485971 A US3485971 A US 3485971A
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US
United States
Prior art keywords
switching
contact
switching device
casing
transverse wall
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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 - Lifetime
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US737434A
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English (en)
Inventor
Rintje Boersma
Gijsbert W Irik
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COD NV
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COD NV
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Publication date
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear

Definitions

  • the invention relates to a fully enclosed switching device for high voltages, comprising a metal casing to be connected to earth potential and containing switching sections each provided with at least two elements con nected to each other by means of an isolating switch, said isolating switch being provided with two stationary contacts spaced apart and each permanently connected to one of said elements, a double acting, two-part movable switching contact carried by a stationary transverse wall made of insulating material and an earth contact electrically connected to said casing, said movable switching contact being movable such as to bring its one part into contact with or to separate said one part from one of said stationary main contacts and to bring its other part into contact with or to separate said other part from the other one of said stationary main contacts, which movable switching contact, furthermore, may be conductively connected to said metal casing by said earth contact in the switched-off position of the device, said transverse wall dividing the space inside said metal casing permanently into two separated compartments each containing at least a part of one of said elements together with the stationary main contact permanently
  • Switching devices of this type are known from the British patent specification 472,656.
  • the transverse wall of insulating material and the earth contact permit spatial and electrical division of the two elements separated by the isolating switch so that, without any danger, work on the one element may be carried out with the other element under voltage.
  • the insulating transverse wall is clamped directly between the flanges of the two flange-connected portions of the casing which contains the elements to be electrically connected to each other. This construction renders it impossible to remove the one portion of the casing together with the elements and members contained therein without the transverse wall together with the movable part of the isolating switch being removed and without the other casing portion with its elements and members it comprises being opened thereby as well.
  • the invention aims at eliminating this disadvantage of the known switching device.
  • the invention prescribes that the transverse wall made of insulating material and the double acting, two-part, movable switching contact carried thereby are supported by and mounted within a portion of said metal casing, said casing portion furthermore supporting said earth contact and, at and adjacent both sides of said transverse wall, being separably connected to casing portions each containing one stationary main contact of said switching device and an element or part of an element permanently connected to said .one stationary main contact.
  • the transverse wall remains secured to the other portion as a cover. This is especially of importance when the compartments of the switching device are filled with a gas under pressure, f.i. sulphur hexafluoride (SP and the condition of insulation of the device is strongly dependent on the gas pressure. If in that case the one portion of the switching device is removed, the other portion may be kept under normal gas pressure and may hence safely remain under voltage.
  • SP sulphur hexafluoride
  • each of the parts of said double acting, two-part, movable switching contact of said isolating switch is separably and removably connected to the actuating mechanism as Well as to the other one of said parts.
  • the switching device is so constructed that the plans of division between said portions of the metal casing extend in directions transverse to the longitudinal axes of the free spaces between the switched-off parts of the movable switching contact and the stationary main contacts of the isolating switch cooperating therewith then the casing portion comprising the transverse wall and the switched-01f double switching contact can be removed in transverse direction from the device the casing portion comprising the stationary isolating switch contacts and the elements permanently connected thereto remain in place. It is clear that these stationary contacts and these elements are to be cut off from the voltage.
  • FIG. 1 shows an axial section through two parts of a switching device according to the invention said parts being connected to each other by an isolating switch having axially movable switching pins and
  • FIG. 2 shows a vertical section through a switching section of such a switching device having isolating switches and corresponding principally to the device of FIGURE 1.
  • the device of FIG. 1 consists of two portions 1 and 2 of a fully enclosed switching device, the conducting elements (not-shown in the drawings) of which such as a bus bar or a bus bar system, a power switch, cable connectors or similar parts are mounted in separate compartments of the metal casing of the device and may be electrically connected to each other by means of an isolating switch 3.
  • the casing of this isolating switch consists of four coaxial tube-shaped portions 4, 5, 6 and 7, respectively, of which the portions 4 and 7 are secured to the parts 1 and 2 respectively, of the switching device and are surrounded by stationary main contacts 10, 11 supported by bushing insulators 8, 9, respectively. These stationary main contacts are permanently connected to the aforementioned elements to be connected by the isolating switch by means of connectors 12, 13.
  • the tubeshaped intermediate portion situated between portions 4 and 7 of the casing consists of two portions 5 and 6 connected by means of flanges 14, 15, to flanges 16, 17 of casing portions 4, 7, respectively,'as well as connected to each other by means of flanges 18, 19. Between the flanges 18, 19 a transverse wall 20 of insulating material is clamped which simultaneously supports driven, axially movable switching rods 21 and 22.
  • Each switching rod 21 (22) is provided with a rack bar 23 (24) engaging a gear wheel 26 mounted on a drive shaft 25. This drive shaft may be actuated from outside by means of an insulated part (not shown).
  • the axially movable switching rods 21, 22 cooperate with the stationary main contacts and 11, respectively, and are permanently conductively connected to each other in a way not shown.
  • the switching rods 21, 22 are each screwed to an axial screw threaded pin 27 secured to the rack bars 23, 24 so as to be easily dismounted, repaired or replaced.
  • Rack bar 23 of switching rod 21 is permanently electrically connected to a stationary auxiliary contact 28 situated in the transverse Wall 20, an earth contact 29 constructed as an axially movable switching rod cooperating with the auxiliary contact 28.
  • This earth contact is moved by a piston 31 slidably mounted in a cylinder 30.
  • the movement control of the earth contact is effected in such a way (not represented in the drawing) as to be moved into its active position only after switching rods 21, 22 have been moved over sufficient distance from the stationary main contacts 10, 11, respectively.
  • portion 1 of the switching device has to be removed from the device for maintenance or other purposes, flanges 14 and 16 are to be disconnected.
  • switching rod 21 and the transverse Wall surface facing this rod may be inspected, repaired or cleaned. If the portion 2 of the switching device has to be removed or if the other side of the insulating switch has to be inspected, flanges and 17 have to be disconnected and stationary main contact 10 together with the switching device parts connected thereto may remain under voltage.
  • intermediated portion 5, 6 of the metal casing of the isolating switch may also consist of a single tube into which the transverse wall 20 is slid and within which it is kept in place by inner flanges. Such a construction is shown in FIG. 2.
  • FIG. 2 shows a one-phase switching section of a fully enclosed switching device comprising two bus bar systems 35, 36, two bus bar isolating switches 37, 38 constructed approximately in a way similar to that of FIG. 1, the intermediate portion and the insulating transverse wall and the switching rods of these isolating switches consisting of one piece 39, 40, respectively.
  • the switching device furthermore, comprises a power switch 41, a cable insulating switch 42 similar to bus bar isolating switches 37, 38 and provided with an intermediate portion 43, and a cable terminating box 44.
  • the switching device is a special one in that intermediate portions 39, 40 of each bus bar isolating switch 37, 38 are separably and removably arranged between connecting stubs 45, 46 of metal tubes 47, 48 surrounding bus bars 35, 36, respectivley, and connecting stubs 49, 50, respectively, of metal vessel 51 of power switch 41 and in that intermediate portion 43 of cable isolating switch 42 is separably and removably arranged between a connecting stub 52 of vessel 51 and a connecting stub 53 of a metal housing 54 of cable terminating box 44.
  • the halves of separating switches 37, 38, 42 are not mounted in separate compartments of the device.
  • a fully enclosed switching device for high voltages comprising a metal casing to be connected to earth potential and containing switching sections each provided with at least two elements connected to each other by means of an isolating switch, said isolating switch being provided with two stationary contacts spaced apart and each permanently connected to one of said elements, a double acting, two-part movable switching contact carried by a stationary transverse wall made of insulating material and an earth contact electrically connected to said casing, said movable switching contact being movable such as to bring its one part into contact with or to separate said one part from one of said stationary main contacts and to bring its other part into contact with or to separate said other part from the other one of said stationary main contacts, which movable switching contact, furthermore, may be conductively connected to said metal casing by said earth contact in the switched-off position of the device, said transverse wall dividing the space inside said metal casing permanently into two separated compartments each containing at least a part of one of said elements together with the stationary main contact permanently connected thereto and with the movable

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US737434A 1967-06-19 1968-06-17 Fully enclosed switching devices for high voltages Expired - Lifetime US3485971A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6708481A NL6708481A (ru) 1967-06-19 1967-06-19

Publications (1)

Publication Number Publication Date
US3485971A true US3485971A (en) 1969-12-23

Family

ID=19800478

Family Applications (1)

Application Number Title Priority Date Filing Date
US737434A Expired - Lifetime US3485971A (en) 1967-06-19 1968-06-17 Fully enclosed switching devices for high voltages

Country Status (6)

Country Link
US (1) US3485971A (ru)
JP (1) JPS4939345B1 (ru)
BE (1) BE701473A (ru)
DE (2) DE1975778U (ru)
GB (1) GB1158078A (ru)
NL (1) NL6708481A (ru)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599041A (en) * 1969-08-04 1971-08-10 Coq Nv Isolator switches provided with grounding switch blades and ground responsive signalling and protective means
US3610858A (en) * 1967-04-06 1971-10-05 Bbc Brown Boveri & Cie Disconnecting device for fully insulated high-voltage electrical switchgear with individually reciprocal contacts
US3654409A (en) * 1969-11-14 1972-04-04 Siemens Ag Metal-clad high voltage circuit breaker apparatus
US3830994A (en) * 1973-09-13 1974-08-20 Ite Imperial Corp Double break high voltage disconnect switch
DE2905859A1 (de) * 1978-02-24 1979-09-06 Tokyo Shibaura Electric Co Gekapseltes schaltgeraet
WO2013060675A1 (fr) 2011-10-25 2013-05-02 Alstom Technology Ltd Dispositif d'aiguillage electrique a un point de jonction entre deux parties d'un reseau

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1615857C2 (de) * 1968-02-22 1974-03-28 Brown, Boveri & Cie Ag, 6800 Mannheim Vollisolierte metallgekapselte Schaltanlage
FR2129885B1 (ru) 1971-03-18 1974-02-15 Alsthom Cgee
DE19511168A1 (de) * 1995-03-28 1996-10-02 Abb Management Ag Schaltvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981814A (en) * 1957-01-22 1961-04-25 Westinghouse Electric Corp Circuit interrupters
US3123698A (en) * 1961-02-10 1964-03-03 Circuit breakers having interrupting contacts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981814A (en) * 1957-01-22 1961-04-25 Westinghouse Electric Corp Circuit interrupters
US3123698A (en) * 1961-02-10 1964-03-03 Circuit breakers having interrupting contacts

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610858A (en) * 1967-04-06 1971-10-05 Bbc Brown Boveri & Cie Disconnecting device for fully insulated high-voltage electrical switchgear with individually reciprocal contacts
US3599041A (en) * 1969-08-04 1971-08-10 Coq Nv Isolator switches provided with grounding switch blades and ground responsive signalling and protective means
US3654409A (en) * 1969-11-14 1972-04-04 Siemens Ag Metal-clad high voltage circuit breaker apparatus
US3830994A (en) * 1973-09-13 1974-08-20 Ite Imperial Corp Double break high voltage disconnect switch
DE2905859A1 (de) * 1978-02-24 1979-09-06 Tokyo Shibaura Electric Co Gekapseltes schaltgeraet
US4297553A (en) * 1978-02-24 1981-10-27 Tokyo Shibaura Denki Kabushiki Kaisha Enclosed switching apparatus
WO2013060675A1 (fr) 2011-10-25 2013-05-02 Alstom Technology Ltd Dispositif d'aiguillage electrique a un point de jonction entre deux parties d'un reseau
CN103907167A (zh) * 2011-10-25 2014-07-02 阿尔斯通技术有限公司 网络的两个部件之间的接合点处的电气开关设备
CN103907167B (zh) * 2011-10-25 2016-06-01 阿尔斯通技术有限公司 网络的两个部件之间的接合点处的电气开关设备

Also Published As

Publication number Publication date
BE701473A (ru) 1968-01-02
DE1975778U (de) 1967-12-28
GB1158078A (en) 1969-07-16
DE1665255A1 (de) 1971-01-21
JPS4939345B1 (ru) 1974-10-24
NL6708481A (ru) 1968-12-20

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