US3881138A - Valve regulating means disposed between HV switching apparatus and over voltage arresting mechanism maintaining pressure differential therebetween - Google Patents

Valve regulating means disposed between HV switching apparatus and over voltage arresting mechanism maintaining pressure differential therebetween Download PDF

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Publication number
US3881138A
US3881138A US375518A US37551873A US3881138A US 3881138 A US3881138 A US 3881138A US 375518 A US375518 A US 375518A US 37551873 A US37551873 A US 37551873A US 3881138 A US3881138 A US 3881138A
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United States
Prior art keywords
housing
switching system
coupled
insulating medium
chamber
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Expired - Lifetime
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US375518A
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English (en)
Inventor
Gunther Luxa
Werner Jakszt
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Siemens AG
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Siemens AG
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Filing date
Publication date
Priority claimed from DE19722235514 external-priority patent/DE2235514C3/de
Application filed by Siemens AG filed Critical Siemens AG
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    • 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
    • H02B13/0356—Mounting of monitoring devices, e.g. current transformers

Definitions

  • the invention relates to high-voltage switching systems, and in particular, to a high-voltage switching system of the type utilizing a dense, gaseous insulating medium which includes an improved voltage overload arresting apparatus.
  • German Auslegeschrift Pat. No. 1,241,514 discloses a high-voltage switching system which is encapsulated in a metal housing and includes a spark gap.
  • the housing is filled with a dense, insulating gas, such as. for example. sulfur hexafluoride, in which gaseous insulating medium the spark gap operates.
  • Improved switching systems of the type described above generally include voltage overload arresting apparatus which comprise both a spark gap and an arrangement of voltage dependent resistors which limit current surges. It is known, as taught by US Pat. No. 2,757,26l, that improved performance of a voltage overload arresting apparatus can be obtained by filling the housing thereof with sulfur hexafluoride.
  • the correlation between the pressure of the gas in the voltage overload arresting apparatus housing, and the ratio of the breakdown voltage to the quenching voltage, especially when sulfur hexafluoride is usedas the insulating medium. has. however, not been appreciated by the prior art.
  • the invention provides, in a highvoltage switching system of the type described above, regulating means, coupled to the housing of the switching apparatus at one end, and to the housing of the voltage overload arresting apparatus at the other end thereof, for regulating the pressure within the housing of the arresting apparatus so as to maintain the pressure of a gaseous insulating medium therein at a constant pressure which is less than the pressure of the same gaseous insulating medium in the housing of the switching system.
  • the regulating means comprises a reduction valve coupled to the switching system housing and the voltage overload arresting apparatus housing.
  • a filtering means and pump may also be coupled to a line connecting the housings, for purifying the gaseous insulating medium flowing from the switching system housing to the voltage overload arresting apparatus housing.
  • the arresting apparatus housing includes a separate sealed chamber fora spark gap, and another sealed chamber for a voltage dependent resistor arrangement thereof.
  • the chambers in which the resistors are disposed may also be separately coupled to the housing of the switching system by means of a suitable connecting line. and preferably includes a check valve which prevents contaminated gas from flowing into the switching system housing.
  • the spark gap of the arresting apparatus is divided into a pair of spark gaps. one of which comprises an ignition spark gap, disposed in separate sealed chambers.
  • a contact breaker device is coupled to the ignition spark gap for triggering the apparatus when a voltage overload occurs.
  • FIG. 1 is a schematic side view, partially in section, of a high-voltage switching system, including an improved voltage overload arresting apparatus constructed according to the invention
  • FIG. 3 is a schematic illustration of another embodiment of an improved arresting apparatus constructed according to the invention, wherein the arresting apparatus housing is divided into separate chambers for containing the voltage dependent resistors and the spark gap of the arresting apparatus; and
  • FIG. 4 is a schematic illustration of still another embodiment of an improved arresting apparatus constructed according to the invention, which utilizes an ignition spark gap as part of the arresting apparatus.
  • FIG. 1 illustrates a high-voltage switching system having a metal housing and a voltage overload arresting apparatus coupled thereto.
  • the system includes a three-phase dual bus bar system (which may be, for example, I I0 kV) including bus bars 1 and 2 and circuit breakers 3 and 4 coupled thereto.
  • the circuit breakers are coupled to each other by a feed line 5.
  • Terminal 7, which may be connected to an electrical cable distribution line, is coupled by feed line 6 to the circuit breakers and bus bars.
  • Conductor 8 is coupled to the feed line 5 and connects terminal 7 to circuit breakers 3 and 4.
  • a voltage overload arresting apparatus 9 is disposed beneath the housing 10 of the high-voltage switching system and is coupled thereto by a pressure resistant line 13.
  • the arresting apparatus is also electrically connected to conductor 8 in housing 10 by another conductor.
  • Regulating means 16 is coupled to the line and regulates the pressure of the gaseous insulating medium in housing 12 of the arresting apparatus relative to the pressure in housing 10 of the switching system.
  • the regulating means may, for example, comprise a reduction valve which may simultaneously prevent backflow of gas from housing 12 to housing 10 when an overload occurs and the pressure in housing 12 rapidly increases.
  • FIG. 2 One embodiment of the improved arresting apparatus is illustrated in FIG. 2.
  • housing 10 is coupled to housing 12 by means of a line 23, and a filtering means shown as filter 24, is disposed between the housings and coupled to the line.
  • the gaseous insulating medium flows through line 23 from housing 10 to housing 12 through filter 24 which, in combination with a pump 21, ensures that the gas is purified before it is admitted to the arresting apparatus housing:
  • This filtering process carried out by pump 21 and filter 24 ensures that the breakdown voltage of the spark gap of the arresting apparatus is maintained at a constant voltage level.
  • Reduction valve 22 operates to maintain the pressure inthe arresting apparatus housing 12 at a constant pressure which is slightly below that of the pressure in the switching system housing 10.
  • Pump 21 and valve 22 are coupled to housing by line 20.
  • arresting apparatus includes a separate chamber 31 in which spark gap 32 is disposed, and an additional chamber 33 in which the voltage dependent resistors 34 are disposed.
  • the spark gap utilized throughout the various embodiments of the invention comprises a known series connection of individual spark gaps, and the voltage dependent resistors are formed 'bya column of individual resistor elements. The separation of the housing into sealed chambers in this embodiment prevents decomposition products,
  • a pump and a reduction valve are coupled by means of line 35 to the arresting apparatushousing and the switching system housing. ln thisembodiment, chamber 31 is sealed, and
  • a filtering means is also coupled by a line 36 to the switching system housing and arresting apparatus chamber 31.
  • Chamber 33 in which the voltage dependent resistors 34 are disposed, is sealed and is-filled with the same gas utilized as a gaseous insulating medium in housing 10, namely, sulfur hexafluoride,
  • Chamber 33 is coupled by means of line 37 to housing 10 of the switching system, which line includes a check valve 38 coupled thereto. The line equalizes the pressure in chamber 33 and in housing 10, and the check valve prevents contaminated gas from being forced into housing 10 upon the occurence ofa voltage overload.
  • voltage arresting apparatus 40 includes a separately sealed chamber 41 for the voltage dependent resistors of the arresting apparatus.
  • the spark gap of the gap in a known manner.
  • Chamber 41 in which the voltage dependent resistors are disposed, may be connected to the interior of housing 10 of the switching system as described in the previous embodiments of the invention.
  • Chamber 45 in which spark gap 43 is disposed, contains a gaseous insulating medium which is [different than that used as an insulating medium in switching apparatus housing 10, such as, for example,
  • the breakdown voltage of spark. gapi, 43 is thus lower than the breakdown voltage of sparkgfap 42,
  • said regulating means valve means comprises a reduction valve coupled to the switching system housing and said chamber of said arresting apparatus housing.
  • said regulating means comprises said reduction valve in combination with a check valve for preventing the flow of said gaseous insulating medium from said arresting I apparatus housing to the switching system housing.
  • arresting apparatus housing further comprises a second sealed chamber in which said voltage dependent resistance means is disposed, said spark gap being disposed in said first housing chamber, and said pump, valve, and filtering means being coupled to said first chamber.
  • valve means coupled to said line, for preventing flow of the gaseous insulating medium from said second chamber to the switching system housing.
  • said arresting apparatus housing includes a second sealed chamber, first and second spark gaps being disposed in said first and second chambers. respectively. and a third sealed chamber in which said voltage dependent resistance means is disposed, and further comprising a line coupled to the switching system housing and one of said first and second chambers, filtering means coupled to said line for purifying said gaseous insulating medium flowing through said line into said arresting ap paratus housing, said other of said first and second chambers containing a gaseous insulating medium which is different than the gaseous insulating medium in the switching system housing.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Generation Of Surge Voltage And Current (AREA)
US375518A 1972-07-14 1973-07-02 Valve regulating means disposed between HV switching apparatus and over voltage arresting mechanism maintaining pressure differential therebetween Expired - Lifetime US3881138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722235514 DE2235514C3 (de) 1972-07-14 Metallgekapselte Hochspannungsschaltanlage mit einem Überspannungsableiter

Publications (1)

Publication Number Publication Date
US3881138A true US3881138A (en) 1975-04-29

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US375518A Expired - Lifetime US3881138A (en) 1972-07-14 1973-07-02 Valve regulating means disposed between HV switching apparatus and over voltage arresting mechanism maintaining pressure differential therebetween

Country Status (5)

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US (1) US3881138A (pt)
CA (1) CA996182A (pt)
CH (1) CH559442A5 (pt)
FR (1) FR2193273B1 (pt)
GB (1) GB1414367A (pt)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041545A (en) * 1974-10-02 1977-08-09 Delle-Alsthom Lightning conductor in a metallic casing
US6236010B1 (en) 1999-07-14 2001-05-22 Southern States, Inc. Circuit interrupter including a penetrating electrical contact with grip and release structure
US6316742B1 (en) 1999-07-14 2001-11-13 Southern States, Inc. Limited restrike circuit interrupter used as a line capacitor and load switch

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072828A (en) * 1959-08-03 1963-01-08 Acec Mounting for lightning-arresters
US3280376A (en) * 1963-08-15 1966-10-18 Dale Electronics Lightning arrester
US3378731A (en) * 1965-07-26 1968-04-16 Westinghouse Electric Corp High voltage substation for metropolitan areas
US3566183A (en) * 1968-07-11 1971-02-23 Gen Electric Lightning arrester cooling apparatus
US3566062A (en) * 1969-07-28 1971-02-23 Ite Imperial Corp Heater arrangement for sf-6 circuit breakers
US3622725A (en) * 1970-02-24 1971-11-23 Ite Imperial Corp Pressure controller for gas circuit breaker
US3733521A (en) * 1971-09-27 1973-05-15 Ohio Brass Co Lightning arrester
US3743804A (en) * 1971-03-05 1973-07-03 Nvcoq Metal clad electric distribution and switching plants for high voltages
US3777218A (en) * 1971-09-30 1973-12-04 Siemens Ag Metal-clad high-voltage switching system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072828A (en) * 1959-08-03 1963-01-08 Acec Mounting for lightning-arresters
US3280376A (en) * 1963-08-15 1966-10-18 Dale Electronics Lightning arrester
US3378731A (en) * 1965-07-26 1968-04-16 Westinghouse Electric Corp High voltage substation for metropolitan areas
US3566183A (en) * 1968-07-11 1971-02-23 Gen Electric Lightning arrester cooling apparatus
US3566062A (en) * 1969-07-28 1971-02-23 Ite Imperial Corp Heater arrangement for sf-6 circuit breakers
US3622725A (en) * 1970-02-24 1971-11-23 Ite Imperial Corp Pressure controller for gas circuit breaker
US3743804A (en) * 1971-03-05 1973-07-03 Nvcoq Metal clad electric distribution and switching plants for high voltages
US3733521A (en) * 1971-09-27 1973-05-15 Ohio Brass Co Lightning arrester
US3777218A (en) * 1971-09-30 1973-12-04 Siemens Ag Metal-clad high-voltage switching system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041545A (en) * 1974-10-02 1977-08-09 Delle-Alsthom Lightning conductor in a metallic casing
US6236010B1 (en) 1999-07-14 2001-05-22 Southern States, Inc. Circuit interrupter including a penetrating electrical contact with grip and release structure
US6316742B1 (en) 1999-07-14 2001-11-13 Southern States, Inc. Limited restrike circuit interrupter used as a line capacitor and load switch

Also Published As

Publication number Publication date
CH559442A5 (pt) 1975-02-28
FR2193273B1 (pt) 1977-09-16
DE2235514B2 (de) 1975-03-27
FR2193273A1 (pt) 1974-02-15
GB1414367A (en) 1975-11-19
CA996182A (en) 1976-08-31
DE2235514A1 (de) 1974-01-24

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