US3846602A - Dual-pressure high-voltage compressed-gas insulated electric circuit breaker - Google Patents

Dual-pressure high-voltage compressed-gas insulated electric circuit breaker Download PDF

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Publication number
US3846602A
US3846602A US00321027A US32102773A US3846602A US 3846602 A US3846602 A US 3846602A US 00321027 A US00321027 A US 00321027A US 32102773 A US32102773 A US 32102773A US 3846602 A US3846602 A US 3846602A
Authority
US
United States
Prior art keywords
chamber
condensate
gas
pressure
container
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 - Lifetime
Application number
US00321027A
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English (en)
Inventor
F Hoffmann
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens 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
Priority to DE19712149625 priority Critical patent/DE2149625A1/de
Priority to JP47100234A priority patent/JPS4844770A/ja
Application filed by Siemens Corp filed Critical Siemens Corp
Priority to US00321027A priority patent/US3846602A/en
Application granted granted Critical
Publication of US3846602A publication Critical patent/US3846602A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • H01H33/562—Means for avoiding liquefaction or for disposing of liquefaction products

Definitions

  • ABSTRACT Electric high-voltage equipment such as a circuit breaker, includes a chamber in which high voltage parts may be positioned and containing electrically insulating compressed-gas capable of condensation to a liquid under increased pressure and/or lowered temperature.
  • a condensate-collecting container is connected to the chamber to receive the condensed liquid.
  • the chamber operates at high pressure and the container at a lower pressure, causing the condensate to vaporize therein to a gas. This gas is pumped, with increased pressure, from the container back into the chamber where the higher pressure is to be maintained.
  • a float valve controls the discharge of condensate from the high pressure chamber into the low pressure container.
  • Metal-cladhigh-voltage electricswitching equipment and the like includes a grounded metal casing which contains a compressed electrically insulating gas such as SE, in the space between the electricallyconducting parts and vthegrou'nded metal casing.
  • a compressed electrically insulating gas such as SE
  • the casing where the gas is confined at .a high pressure suitable for electrical insulation purposes may be connected with a "lower pressure container interconnecting with the :high pressure casing and from which the gas is drawn, increased in pressure and introduced to the high pressure space, with the heat produced by the compressor-being introduced to the latter to elevate its temperature and prevent further condensation.
  • a pressure sensitive device may operate to power the compresso-r.
  • One object of the present invention is to provide a simplified means for maintaining the proper pressure on the electrically insulating gas in the chamber enclosing the electrical equipment requiring the insulation, even when condensation of the gas occurs, by a simplifled arrangement or means that does not involve expensive heating of measuring and control elements.
  • this object is attained by providing the high pressure chamber when the gas pressure must be maintained, with a bottom or lower part forming a sump in the bottom of which an orifice opens into the low pressure container to which the condensate is introduced for conversion to its gas phase due to the lower pressure there existing.
  • a float is positioned which controls a needle valve movable to closed'and opened positions relative to the orifice, the inlet of the latter forming a valve seat.
  • the float has a displacement volume only slightly less than the containing volume of the sumps interior to provide sensitivity, a very small amount of condensate falling to the sump buoying up the float and opening the needle valve from the orifice so that the higher pressure within thec'hamberforces the condensate into the container where the lower pressure exists with consequent vaporization or gasification of the condensate.
  • the float is preferably biased upwardly by an adjustable biasing spring means acting as a float lifting spring, the force of which can be adjusted.
  • a compressor has its inlet end connected to the low pressure container into which'thesump discharges and its high pressure end connected to the chamber where the gaspressure must be maintained for electrical insulating purposes. In this way a pressure differential is maintainedbetween the container and the chamber.
  • the condensate discharges into the container upon opening of the needle valve, there is, of course, a refrigerating effect so that the gas insulation, although returned to its gas phase, is cold.
  • the compression of the gas meaning that work is .put into it, raises its temperature so that relatively warm or hot gas is returned to the chamber from which it condensed.
  • relatively inexpensive means may be provided for detecting a change in the pressure differential between the chamber and the container, such means then causing the compressor to operate so long as the pressure differential measurement indicates the need for such operation.
  • the compressor is powered by an electric motor.
  • FIGURE schematically shows the bottom of the chamber containing the electrical equipment (not shown) with the low pressure container and the interconnecting sump and float valve arrangement shown in vertical section.
  • the high pressure chamber 1 which must connect with the low pressure container 2 has its bottom 3 shaped to provide a sump enclosing an interior space 4 into which any possibly condensed gas falls, it being understood that the chamber 1 contains the compressed gas insulation which is capable of condensing in the case of a pressure increase due to the electrical arcing or other action of 4 has almost, but not quite, the containing volume which can be related to the displacement volume of the float 6.
  • the sides and bottom of the float 6 substantially coincide in contour to that of the space 4 defined by the sump formed in the bottom 3.
  • the spring suspends the float-actuated needle valve 7 which is in the form of a long rod extending to above the upper part of the spring and engaging with the latter via adjustment nuts 7a.
  • the orifice in the bottom of the sumpdefining the space 4 is shown at 8, the upper portion of this orifice being normally closed by the tip of the needle valve 7.
  • the orifice is made with a substantial length.
  • the compressor which draws the gas from the container 2 is shown at with its output connecting with the chamber space 1 where the gas insulating pressure must be maintained.
  • This compressor draws from the container 2 via a suitable fluid filter 9.
  • .condensate formed in the chamber 1 flows into the sump space 4 and lifts the float 6 with consequent lifting of the needle valve 7, the liquified gas discharging through the orifice 8 into the lower pressure container 2 and converting to its gas phase.
  • This gas is drawn by the compressor 10 and forced under the necessary higher pressure into the chamber 1 so that the pressure in the latter is maintained at the necessary pressure value.
  • pressure differential actuated .4 means may be used jto start and stop the operation of the compressor 10 assuming that it is electrically powered.
  • automatic means (not shown) may be provided for maintaining a predetermined pressure differential between the high pressure chamber 1 and the low pressure container 2.
  • Electric high-voltage equipment including a chamber containing electrically insulating'compressed gas which condenses to a liquid under increased pressure and/or lowered temperature, a condensate collecting container positioned and connected with the chamber to receive the condensed liquid therefrom and which is maintained at a reduced pressure returning the condensate to gas, and a compressor connected to this container to remove the gas therefrom and force it into the chamber to maintain in the latter the electrical insulation provided by the compressed gas; wherein the improvement comprises means for forming a fluid connection between the container and the chamber and which is responsive to the production of condensate in the latter to open the interconnection and which otherwise closes the interconnection.
  • said means is a sump in the bottom of the said chamber for receiving the condensate, the sump having an orifice in its bottom forming a valve seat and a needle valve normally closing this orifice, a float connected to the needle valve lifting the latter when condensate collects in the sump.

Landscapes

  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US00321027A 1971-10-05 1973-01-04 Dual-pressure high-voltage compressed-gas insulated electric circuit breaker Expired - Lifetime US3846602A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19712149625 DE2149625A1 (de) 1971-10-05 1971-10-05 Mit verfluessigbarem, elektronegativem gas gefuellter zweidruck-hochspannungsschalter
JP47100234A JPS4844770A (cs) 1971-10-05 1972-10-05
US00321027A US3846602A (en) 1971-10-05 1973-01-04 Dual-pressure high-voltage compressed-gas insulated electric circuit breaker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712149625 DE2149625A1 (de) 1971-10-05 1971-10-05 Mit verfluessigbarem, elektronegativem gas gefuellter zweidruck-hochspannungsschalter
US00321027A US3846602A (en) 1971-10-05 1973-01-04 Dual-pressure high-voltage compressed-gas insulated electric circuit breaker

Publications (1)

Publication Number Publication Date
US3846602A true US3846602A (en) 1974-11-05

Family

ID=25761829

Family Applications (1)

Application Number Title Priority Date Filing Date
US00321027A Expired - Lifetime US3846602A (en) 1971-10-05 1973-01-04 Dual-pressure high-voltage compressed-gas insulated electric circuit breaker

Country Status (3)

Country Link
US (1) US3846602A (cs)
JP (1) JPS4844770A (cs)
DE (1) DE2149625A1 (cs)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985987A (en) * 1975-07-31 1976-10-12 Allis-Chalmers Corporation Means for recycling liquified insulating gas in a gas insulated circuit breaker
US4326867A (en) * 1976-08-16 1982-04-27 Stokes Anthony D Gas recovery
FR2582145A1 (fr) * 1985-05-15 1986-11-21 Alsthom Disjoncteur a hexafluorure de soufre fonctionnant dans un environnement a tres basse temperature
EP0204180A1 (fr) * 1985-05-15 1986-12-10 Alsthom Disjoncteur à hexafluorure de soufre fonctionnant dans un environnement à très basse température
US4831220A (en) * 1987-03-31 1989-05-16 Siemens Aktiengesellschaft High-voltage compressed-gas circuit breaker

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49126969A (cs) * 1973-04-19 1974-12-05
JPS5335169B2 (cs) * 1973-04-19 1978-09-26

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923759A (en) * 1955-01-10 1960-02-02 Northrop Corp Temperature controller
US3150245A (en) * 1957-09-13 1964-09-22 Westinghouse Electric Corp Liquefied gas circuit interrupters
US3406269A (en) * 1965-02-26 1968-10-15 Westinghouse Electric Corp Fluid-blast circuit breakers having means for increasing the density of the fluid during interruption

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923759A (en) * 1955-01-10 1960-02-02 Northrop Corp Temperature controller
US3150245A (en) * 1957-09-13 1964-09-22 Westinghouse Electric Corp Liquefied gas circuit interrupters
US3406269A (en) * 1965-02-26 1968-10-15 Westinghouse Electric Corp Fluid-blast circuit breakers having means for increasing the density of the fluid during interruption

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985987A (en) * 1975-07-31 1976-10-12 Allis-Chalmers Corporation Means for recycling liquified insulating gas in a gas insulated circuit breaker
US4326867A (en) * 1976-08-16 1982-04-27 Stokes Anthony D Gas recovery
FR2582145A1 (fr) * 1985-05-15 1986-11-21 Alsthom Disjoncteur a hexafluorure de soufre fonctionnant dans un environnement a tres basse temperature
EP0204180A1 (fr) * 1985-05-15 1986-12-10 Alsthom Disjoncteur à hexafluorure de soufre fonctionnant dans un environnement à très basse température
US4831220A (en) * 1987-03-31 1989-05-16 Siemens Aktiengesellschaft High-voltage compressed-gas circuit breaker

Also Published As

Publication number Publication date
JPS4844770A (cs) 1973-06-27
DE2149625A1 (de) 1973-04-12

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