US3619527A - Compressed-air electric apparatus embodying a drying device - Google Patents

Compressed-air electric apparatus embodying a drying device Download PDF

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Publication number
US3619527A
US3619527A US867012A US3619527DA US3619527A US 3619527 A US3619527 A US 3619527A US 867012 A US867012 A US 867012A US 3619527D A US3619527D A US 3619527DA US 3619527 A US3619527 A US 3619527A
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US
United States
Prior art keywords
pressure
air
low
vessel
compressor
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Expired - Lifetime
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US867012A
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English (en)
Inventor
Gerald Billion
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.)
Merlin Gerin SA
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Merlin Gerin SA
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Filing date
Publication date
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Publication of US3619527A publication Critical patent/US3619527A/en
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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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/57—Recuperation of liquid or gas

Definitions

  • the present invention relates to compressed-air electric apparatus disposed in atmospheric air and comprising a highpressure compressed air enclosure and a contiguous low-pressure air vessel and compressor means compressing air taken from said low-pressure vessel to supply compressed gas to said high-pressure enclosure.
  • the compressed gas circulates in a closed circuit and the system is particularly gastight so as to avoid any leakage of gas towards the outside.
  • the fluid of the circuit breaker is no longer subject to the changes in humidity of the surrounding atmosphere and the operating pressures as well as the nature itself of the fluid can beselected independently of said surrounding atmosphere.
  • An object of the present invention is to provide an electric apparatus which does not require absolute tightness while retaining a circulation system for the extinction fluid which is substantially unafl'ected by the surrounding atmospheric conditions.
  • the filter retains its absorbent properties longer the more limited the amount of ambient air entering the circulation system, and the problems of relative tightness are less severe due to the low differences in pressure between the said enclosure and the atmosphere.
  • a compressed-air circuit breaker has two arc-extinguishing chambers 10, 12 born by a hollow supporting insulator 14 which is fastened at its lower part to a low pressure housing or vessel 16 which is located in a zone at ground potential whereby the inside of the insulator l4 communicates hermetically with the reservoir 16.
  • An insulating conduit 18 connects the highand low-voltage zones, extending within the insulator l4, and feeds the chambers 10, 12 with compressed air of high pressure.
  • the air which is passed through the conduit 18 can feed auxiliary high-pressure reservoirs located in the zone of high potential or directly arc-blast devices or even blast devices and pneumatic control devices for the contacts (not shown) located in the chambers.
  • a compressor 20 the intake of which communicates via an absorbent drying filter 22 with the reservoir 16 and the delivery of which, via a conduit 24 in which a drying filter 26 is also contained, feeds a high-pressure reservoir 28 which is also located within the low-pressure reservoir 16.
  • the conduit 18 is connected to the reservoir 28.
  • a discharge or excess-pressure valve 30 which is urged towards its closed position by a compression spring 32 closes off a discharge orifice 34 of the reservoir 16 in such a manner that it automatically opens upon a predetermined excess pressure within the reservoir 16 and permits the air to escape towards the atmosphere, while preventing any entrance of air into the reservoir 16.
  • An admission or inlet valve 36 which is urged towards its closed position by a biasing compression spring 38 permits entrance of surrounding air into the reservoir 16 upon a predetermined vacuum in said reservoir, said entrance taking place through a conduit 40 in which an absorbent or drying filter 42 is contained.
  • the exhaust valves 44, 46 (shown schematically) of the arcextinguishing chambers 10, 12 discharge into a container 48 which communicates hermetically with the inside of the hollow insulator 14.
  • the container 48, the hollow insulator 14 and the housing 16 constitute an enclosure-which will be designated hereinafter by 50-for the recovery of the air escaping from the break chambers l0, 12.
  • the recovery enclosure 50 can communicate with the surrounding atmosphere solely through the admission valve 36 and discharge valve 30.
  • the normal pressure of the enclosure may be between, for instance, 0.7 and 1.3 bar.
  • the compressed-air circuit breaker in accordance with the invention operates as follows:
  • the high-pressure air supplied to the chambers 10, 12 is taken via the conduit 18 from the high-pressure reservoir 28 and causes therein a drop in pressure which is sufficient to cause the starting up of the compressor 20 which is controlled by a manostate (not shown) sensitive to the high pressure.
  • the compressor 20 draws air through the drying filter 22 from the enclosure 50 and again feeds the high pressure reservoir 28 via the drying filter 26 so as to reestablish therein the rated high pressure which causes the stopping of the compressor and which may be for instance of 15 bars. It is easy to see that the air circulates in a closed circuit, the expanded air which escapes from the break chambers l0, 12 being taken up by the compressor 20 and passed via the conduit 18 into the chambers 10, 12. Upon each cycle the air passes through the drying devices 22, 26 which eliminate any residual moisture from it.
  • the calibrations of the control manostate of the compressor 20 and of the valves 30, 36 are such that the variations in pressure in the recovery enclosure 50 are maintained within the limits defined by the valves 30, 36 and the latter remain close.
  • the drying products 22, 26 no longer make any contribution as soon as the volume of air included in the closed circuit has bee dried.
  • a large internal leak of the high-pressure circuit towards the low-pressure circuit may result in an excess of pressure in the enclosure 50 and the opening of the safety valve 30.
  • This discharge of dry air has the same consequences as the aforementioned accidental leaks, namely a decrease inthe quantity of air in the closed circuit which is compensated for upon the placing in operation of the compressor 20 by admission of air through the valve 36.
  • a small internal leak will have no effect on the air-drying devices, the dry air escaping from the high pressure being automatically recovered in the enclosure 50 and therefore maintained within the normal circulation circuit. The only effect is a more frequent operation of the compressor.
  • the entrance of surrounding air into the enclosure 50 through a path other than the admission valve 36, for instance through a defective joint, may cause an increase in the moisture content which is rapidly eliminated by the filters 22 and 26.
  • the air treatment device comprises moisture-absorbing products, but any other conventional device for the removal of water can be used and the treatment of the air may extend to the elimination of any product or component which is harmful to the satisfactory operation of the circuit breaker, for instance dust or corrosive products.
  • circuit interrupter has been discussed in connection with the invention. It should be understood that the invention can also be embodied in another electric apparatus such as a short-circuiting device working in a high pressure air environment but without gas blast.
  • a compressed air electric apparatus disposed in atmospheric air and comprising a high-pressure compressed air enclosure and a contiguous low-pressure air vessel, compressor means compressing air taken from said low-pressure vessel to supply compressed gas to said high-pressure enclosure, norrrially closed valve means for controlling the admission of atmospheric air to said low-pressure vessel, biasing means to bias said valve means towards its closed position, pressure sensitive means to cause the opening of said valve means against the action of said biasing means as the pressure in said lowpressure vessel drops below a predetermined pressure, said predetermined pressure being less than the pressure of said atmospheric air, and an air-drying device to have said compressor means supplying substantially dried compressed air to said high pressure enclosure.
  • An electric apparatus further comprising discharge valve means to discharge air from said lowpressure vessel as the pressure in said vessel rises above a predetermined pressure value.
  • An electric apparatus according to claim I, further comprising an air-drying device connected to said valve means to dry the air flowing through said valve means.
  • a compressed-air circuit interrupter comprising airblast arc-extinguishing means supplied with high-pressure air delivered b compressor means, a low pressure air container to collect t e air exhausted from said arc-extinguishing extinguishing means, said compressor means taking air from said low-pressure container, normally closed valve means for controlling the admission of atmospheric air to said low-pressure vessel, biasing means to bias said valve means towards its closed position, pressure-sensitive means to cause the opening of said valve means against the action of said biasing means as the pressure in said low-pressure vessel drops below a predetermined pressure, said predetennined pressure being less than the pressure of said atmospheric air, and an air drying device to have said compressor means supplying substantially dried compressed air to said high-pressure enclosure.

Landscapes

  • Drying Of Gases (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US867012A 1968-11-06 1969-10-16 Compressed-air electric apparatus embodying a drying device Expired - Lifetime US3619527A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR172839 1968-11-06

Publications (1)

Publication Number Publication Date
US3619527A true US3619527A (en) 1971-11-09

Family

ID=8656575

Family Applications (1)

Application Number Title Priority Date Filing Date
US867012A Expired - Lifetime US3619527A (en) 1968-11-06 1969-10-16 Compressed-air electric apparatus embodying a drying device

Country Status (10)

Country Link
US (1) US3619527A (enrdf_load_stackoverflow)
JP (1) JPS5013944B1 (enrdf_load_stackoverflow)
BE (1) BE740777A (enrdf_load_stackoverflow)
CH (1) CH504772A (enrdf_load_stackoverflow)
DE (1) DE1955665A1 (enrdf_load_stackoverflow)
ES (1) ES372909A1 (enrdf_load_stackoverflow)
FR (1) FR1593617A (enrdf_load_stackoverflow)
GB (1) GB1239688A (enrdf_load_stackoverflow)
SE (1) SE350644B (enrdf_load_stackoverflow)
YU (1) YU275569A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107610969A (zh) * 2017-08-22 2018-01-19 国网山东省电力公司济南供电公司 一种断路器sf6气体实时监控和带电补气装置
US11509121B2 (en) * 2016-08-19 2022-11-22 Siemens Aktiengesellschaft Electrical energy transmission device and life cycle management

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103594276B (zh) * 2013-11-26 2016-04-13 国家电网公司 六氟化硫断路器气体智能补偿装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757261A (en) * 1951-07-19 1956-07-31 Westinghouse Electric Corp Circuit interrupters
US2890312A (en) * 1956-10-11 1959-06-09 Asea Ab Arrangement in air blast circuit breakers in which drying air is delivered to the control air pipe
US3359390A (en) * 1964-06-10 1967-12-19 Bbc Brown Boveri & Cie Compressed gas circuit breaker with circulating system for compressed gas

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757261A (en) * 1951-07-19 1956-07-31 Westinghouse Electric Corp Circuit interrupters
US2890312A (en) * 1956-10-11 1959-06-09 Asea Ab Arrangement in air blast circuit breakers in which drying air is delivered to the control air pipe
US3359390A (en) * 1964-06-10 1967-12-19 Bbc Brown Boveri & Cie Compressed gas circuit breaker with circulating system for compressed gas

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11509121B2 (en) * 2016-08-19 2022-11-22 Siemens Aktiengesellschaft Electrical energy transmission device and life cycle management
CN107610969A (zh) * 2017-08-22 2018-01-19 国网山东省电力公司济南供电公司 一种断路器sf6气体实时监控和带电补气装置
CN107610969B (zh) * 2017-08-22 2019-01-29 国网山东省电力公司济南供电公司 一种断路器sf6气体实时监控和带电补气装置

Also Published As

Publication number Publication date
GB1239688A (enrdf_load_stackoverflow) 1971-07-21
JPS5013944B1 (enrdf_load_stackoverflow) 1975-05-23
FR1593617A (enrdf_load_stackoverflow) 1970-06-01
SE350644B (enrdf_load_stackoverflow) 1972-10-30
DE1955665A1 (de) 1970-06-11
BE740777A (enrdf_load_stackoverflow) 1970-04-01
CH504772A (fr) 1971-03-15
YU275569A (en) 1975-06-30
ES372909A1 (es) 1971-11-16

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