US3562461A - Gas reservoir arrangement in high voltage switch - Google Patents

Gas reservoir arrangement in high voltage switch Download PDF

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Publication number
US3562461A
US3562461A US836721A US3562461DA US3562461A US 3562461 A US3562461 A US 3562461A US 836721 A US836721 A US 836721A US 3562461D A US3562461D A US 3562461DA US 3562461 A US3562461 A US 3562461A
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US
United States
Prior art keywords
pressure
gas
container
reservoir
switch
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
US836721A
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English (en)
Inventor
Karl Kriechbaum
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.)
Licentia Patent Verwaltungs GmbH
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Licentia Patent Verwaltungs GmbH
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Publication date
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Publication of US3562461A publication Critical patent/US3562461A/en
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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

Definitions

  • a gas operated electrical switch for opening and closing high voltage electrical lines has a gas container containing gas at the operating pressure for actuating the switch and a reservoir containing gas at a higher pressure for resup- [54] IN plying the container of gas after a switch actuation.
  • the pres- 9 Claim 2 D in sure reducing means includes a small intermediate receptacle gags which holds gas at substantially the same pressure as in the [52] US. Cl 200/148 reservoir in a quantity which is sufficient to raise the pressure [51] Int.
  • This invention relates to gas operated electrical switches for use in opening and closing extremely high voltage electrical lines, and more particularly to a switch which may be reliably resupplied with gas for a second switching operation immediately after a first switching operation.
  • Gas operated switches are known which are used to open and close electrical switches in circuits operating at very high voltages. Such switches are provided with pressurized gas containers which are located adjacent the high voltage potential switches, and which are supplied with gas from a reservoir container which is electrically grounded. The gas container located adjacent the switch normally contains enough gas to serve for one switching actuation.
  • this prior art patent discloses a reservoir 20 containing sufficient gas for at least two switch ofi' actions and one switch-on action.
  • the gas in the reservoir 20 is air at a pressure on the order of 200 atmospheres gauge which is substantially higher than the operating pressure, approximately 25 atmospheres gauge, of the gas actuated switch.
  • Reservoir 20 is supplied with air by a compressor 22.
  • the air within reservoir 20 is reduced to the operating pressure by a reduction valve 24 and flows through a steadying tank 26.
  • a constant pressure regulating valve 28 supplies the gas at the operating pressure to the gas container 30 through an insulating support connection 29.
  • the above described switch has the advantage that the reservoir 20, which is normally located adjacent to the switch, has a relatively small volume since the gas is at such a high pressure. Furthermore replenishment of the operating pressure container occurs very quickly. Moreover, a flow of scavenging air to remove moisture deposits is not required, as is necessary in some prior art devices. This is because a substantial elimination of the moisture in the air occurs as it expands from the relatively high pressure in reservoir 20 to the relatively low operating pressure used at the switch.
  • a further object of the invention is a provision of such an apparatus in which the gas used for a second switch ofi action has substantially the same pressure as that used for an immediately proceeding switch off action.
  • FIG. 1 is a schematic diagram illustrating a gas operated electrical switch for opening and closing electrical circuits at very high voltages, as disclosed in applicants prior art German Patent DAS 1,244,269.
  • FIG. 2 is a schematic diagram illustrating a gas pressure switch according to the present invention.
  • a gas operated electrical switch 1 includes a gas container 2 which is at the same electrical potential as the switch and is mounted on an insulated hollow support 3. Air at operating pressure is supplied through support 3 from an intermediate receptacle 7 which in turn is supplied from a compressor 5 through a reservoir 6.
  • a manometer 8 is electrically connected to open a solenoid valve 9 to replenish container 2 from the intermediate receptacle 7, which contains sufficient air for one re-switching operation.
  • Manometer 8 is also electrically connected to open a solenoid valve 10 to recharge intermediate receptacle 7 from the reservoir 6 at the same time.
  • Compressor 5 may be any suitable air compressor capable of charging the reservoir 6 to its desired pressure which is on the order of 200 atmospheres gauge. Reservoir 6 is electrically grounded,
  • Intermediate receptacle 7 is made of a glass fiber reenforced plastic material and has a relatively small volume, for example 3 liters. It is filled with pressurized air of 200 atmospheres gauge. The 3 liters are in this particular embodiment the amount which is sufficient to bring the pressure within gas container 2 back to its full value after a first switching action.
  • An air passage pipe 40 connects the reservoir 6 and intermediate receptacle 7.
  • a solenoid valve 10 is mounted in this line adjacent the reservoir and a throttle I1 is mounted between valve 10 and receptacle 7.
  • Gas line 40 continues beyond receptacle 7 with a second throttle 12, the previously mentioned solenoid valve 9, the connection to the insulated supporting connector 3, a safety valve 13, and manometers 8 and 15 being arranged in order thereon.
  • a bypass line 42 extends about solenoid valve 9 and contains further solenoid valve 14.
  • solenoid valve 9 is connected at one end to one terminal 44 of a power source 46 and at its other end to line 45 which leads to one of the contacts of manometer 8.
  • the associated contact of manometer 8, which is closed in response to a drop in the operating pressure within gas container 2 is connected to the other terminal 50 of power source 46.
  • Valve 9 is normally closed; energization of its coil opens its valve to supply replenishing gas from receptacle 7.
  • the contacts of manometer 8 close in response to a drop in pressure within the gas container 2.
  • the coil of solenoid 10 is connected in parallel to the coil of valve 9. One end of the coil is connected to power terminal 44 of power source 46. The other end of the coil is connected through a time delay circuit 48, to the line 45 leading to the contacts of manometer 8 and the other terminal 50 of power source 46.
  • Time delay circuit 48 is of the type in which the delay time for closing may be set at any desired value, for example 3 minutes for a purpose hereafter explained in connection with the description of the operation of the system.
  • valve 14 One end of the coil of solenoid valve 14 is connected to one power terminal 44; the other end of the coil is connected to the other power temiinal 50 through the contacts of a manometer 15. These contacts are so connected that they are closed in response to a drop of pressure within gas container 2 from the operating pressure.
  • Valve 14 is normally closed; energization of its coil opens the valve. In the open position valve 14 has a much smaller cross section than valve 9. Accordingly it may be used to accommodate slight pressure drops of, for example l2 atmospheres gauge within the operating pressure container 2.
  • Manometer 15 is arranged so that its contacts are closed in response to a smaller pressure drop than that which closes the contacts of manometer 8.
  • the throttle 11 has a passage of such cross section that replenishment of the intermediate receptacle 7 takes approximately 3 minutes.
  • the throttle 12 disposed between the intermediate receptacle 7 and gas operating container 2 serves to regulate the pressure increase in such a manner that dangerous pressures are avoided within the supporting insulator connection 3, and a replenishment of pressurized air into the container 2 occurs in less than the minimum momentary interruption time, for example in less than 0.2 seconds.
  • a gas operated electrical switch for use in opening and closing high voltage electrical lines, comprising, in combinaon: n a. switch means for opening and closing a high voltage electrical line; b. gas pressure actuated means for actuating said switch means; I
  • gas container means containing gas at the operating pressure for said actuating means in sufficient quantity for one switching action connected to supply gas to said actuated means;
  • high pressure gas reservoir means holding gas at a pressure which is a multiple of said operating pressure and in a quantity sufficient for a large number of switching operations;
  • gas pressure reducer means connecting the said reservoir and container means for reducing pressure from said high pressure, to said operating pressure
  • said gas pressure reducer means including a small intermediate receptacle for holding gas at substantially the same pressure as said high pressure reservoir and containing a quantity of gas which just suffices to replenish the pressure in said container to its operating pressure after a first switch actuation to thereby permit a second switch actuation immediately thereafter.
  • solenoid valve means located between said intermediate receptacle and said gas container means, and means responsive to the pressure within the said gas container means for operating said solenoid valve means.
  • throttle means disposed in the means connecting the reservoir and the receptacle and the means connecting the receptacle and the gas container means to control the time at which pressure rises within the container means and the receptacle.

Landscapes

  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US836721A 1968-06-28 1969-06-26 Gas reservoir arrangement in high voltage switch Expired - Lifetime US3562461A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681765677 DE1765677B1 (de) 1968-06-28 1968-06-28 Druckgasschalter fuer hohe und hoechste spannungen

Publications (1)

Publication Number Publication Date
US3562461A true US3562461A (en) 1971-02-09

Family

ID=5698552

Family Applications (1)

Application Number Title Priority Date Filing Date
US836721A Expired - Lifetime US3562461A (en) 1968-06-28 1969-06-26 Gas reservoir arrangement in high voltage switch

Country Status (7)

Country Link
US (1) US3562461A (enrdf_load_stackoverflow)
JP (1) JPS499827B1 (enrdf_load_stackoverflow)
CH (1) CH486111A (enrdf_load_stackoverflow)
DE (1) DE1765677B1 (enrdf_load_stackoverflow)
FR (1) FR2011751A1 (enrdf_load_stackoverflow)
GB (1) GB1257048A (enrdf_load_stackoverflow)
SE (1) SE364393B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5884873A (en) * 1996-05-04 1999-03-23 Daimler-Benz Aerospace Airbus Gmbh Suction generator system in an aircraft for maintaining a laminar boundary flow

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS526037U (enrdf_load_stackoverflow) * 1975-07-01 1977-01-17
SE450935B (sv) * 1982-05-21 1987-08-17 Seco Tools Ab Anordning for overforing av fluidum till en roterande verktygshallare
DE3601877C1 (de) * 1986-01-23 1987-06-04 Licentia Gmbh Antrieb fuer Hochspannungs-Leistungsschalter
US4778312A (en) * 1987-05-15 1988-10-18 The Boeing Company Blind hole drilling coolant remover and tapping fluid injector and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA696066A (en) * 1960-06-17 1964-10-13 The English Electric Company Limited Gas blast circuit-breakers
GB1013278A (en) * 1961-10-12 1965-12-15 Asea Ab Feeding system for compressed air for air blast electric circuit breakers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD58534A (enrdf_load_stackoverflow) *
DE1244269B (de) * 1964-12-07 1967-07-13 Licentia Gmbh Druckgasschalter fuer hohe und hoechste Spannungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA696066A (en) * 1960-06-17 1964-10-13 The English Electric Company Limited Gas blast circuit-breakers
GB1013278A (en) * 1961-10-12 1965-12-15 Asea Ab Feeding system for compressed air for air blast electric circuit breakers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5884873A (en) * 1996-05-04 1999-03-23 Daimler-Benz Aerospace Airbus Gmbh Suction generator system in an aircraft for maintaining a laminar boundary flow

Also Published As

Publication number Publication date
CH486111A (de) 1970-02-15
GB1257048A (enrdf_load_stackoverflow) 1971-12-15
SE364393B (enrdf_load_stackoverflow) 1974-02-18
FR2011751A1 (enrdf_load_stackoverflow) 1970-03-06
JPS499827B1 (enrdf_load_stackoverflow) 1974-03-06
DE1765677B1 (de) 1971-11-11

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