US2542650A - Arrangement in electrical air blast circuit breakers - Google Patents

Arrangement in electrical air blast circuit breakers Download PDF

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Publication number
US2542650A
US2542650A US2925A US292548A US2542650A US 2542650 A US2542650 A US 2542650A US 2925 A US2925 A US 2925A US 292548 A US292548 A US 292548A US 2542650 A US2542650 A US 2542650A
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US
United States
Prior art keywords
valve
air
valves
arrangement
air blast
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
US2925A
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English (en)
Inventor
Forwald Haakon
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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
Application filed by ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US2542650A publication Critical patent/US2542650A/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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic

Definitions

  • This invention relates to an arrangement in electrical air blast circuit breakers.
  • the present invention has for its object to provide an arrangement for, facilitating the operating of the air blast control system.
  • the invention consists in dividing the commonly used single air blast valve into two air valves and in so arranging such valves that when one of them is opened by a force counteracting the unbalanced force from the compressed air, the air escaping through this valve will aid in opening the other valve by counteracting the unbalanced force from the compressed. air on the disc of this valve.
  • valves 5 Oiithe dra'wing, l designates the extinguishing chambers of the switch, 2 is a compressed air container, and 3 is a conduit for the delivering of compressed air to the extinguishing chambers.
  • the conduit 3 may, by means of the disc valves 4, be brought into communication with the interior of the compressed air container 2.
  • These valves 5, are provided with valve discs 4, 5 respectively, and are operated by pistons G, a movable in operating cylinders 8, 9,
  • valves 4, 5 are held in their closed position by springs ii, I2 acting on the pistons 6 and l', and are operated by means of an operating valve it giving access of compressed air from the container 2 to the cylinders 8 and 9.
  • valves Al, 5 In operation, when the valves Al, 5 are closed the air in the container exerts a considerable force on the upper side of the discs 4 and 5 and together with the springs l 5, i2 forces said valves against their seating, the lower sides of the discs being exposed to atmospheric pressure.
  • valve 53 When the valve 53 is opened the lower sides of the pistons 6, l are exposed to the pressure in the con-- tainer 2 and the valves 4, 5 are opened since the force exerted by the pistons on the discs 4, is greater than the force exerted downwardly on the discs by the springs and by the air in the container.
  • the opening area of a valve is'the product of the circumference of the valve disc and the distance between the valve seat and the disc when in the opened position. This area is thus proportional to the diameter of the valve disc.
  • the force necessary for operating the valve disc is proportional to the square of the valve disc diameter.
  • the invention has the further important ad- Vantage that if one valve should stick, the air escaping through the other valve into the conduit 3 would aid in opening the first valve by exerting pressure on the underside of the disc 4 or 5.
  • Control means for the delivery of compressed air to the extinguishing chambers of electric circuit-breakers comprising at least two valves for controlling the flow of compressed air to the said chambers, and means providing uninterrupted air communication between said valves on their outlet sides.
  • Control means for the delivery of arc extinguishing air individually to the difierent phases of an electric circuit breaker comprising a plurality of valves controlling the flow of air, and a common chamber providing uninterrupted air communication between the valves on their outlet sides.
  • Control means for the delivery of compressed air to the extinguishing chambers of a plurality of breaking poles of an electric circuit breaker comprising means for conducting air to all the chambers, at least two valves for the control of the air to all said chambers, and a common air chamber providing free communication between the outlet sides of said valves.
  • Control means according to claim 1 comprising a common pilot valve controlling the operation of said valves.
  • Control means for the delivery of compressed air individually to the extinguishing chambers of different phases in electric circuit-breakers comprising a plurality of valves controlling the delivery of air, means providing free communication between the outlet sides of the difierent valves, and a valve controlling pilot valve for said delivery valves.
  • An electric air blast circuit breaker comprising are extinguishing chambers, an extinguishing air pipe line common for all the extinguishing chambers, a common compressed air magazine for said extinguishing chambers, at least two air valves each providing independent communication between said air magazine and said pipe line, and means for operating said valves.

Landscapes

  • Circuit Breakers (AREA)
  • Fluid-Driven Valves (AREA)
  • Lift Valve (AREA)
US2925A 1946-06-13 1948-01-17 Arrangement in electrical air blast circuit breakers Expired - Lifetime US2542650A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE256943X 1946-06-13

Publications (1)

Publication Number Publication Date
US2542650A true US2542650A (en) 1951-02-20

Family

ID=20306338

Family Applications (1)

Application Number Title Priority Date Filing Date
US2925A Expired - Lifetime US2542650A (en) 1946-06-13 1948-01-17 Arrangement in electrical air blast circuit breakers

Country Status (6)

Country Link
US (1) US2542650A (me)
BE (1) BE473866A (me)
CH (1) CH256943A (me)
DE (1) DE959929C (me)
FR (1) FR947876A (me)
GB (1) GB623921A (me)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1289339A (en) * 1915-08-31 1918-12-31 Westinghouse Electric & Mfg Co Valve-control mechanism.
US1937482A (en) * 1928-09-18 1933-11-28 Ruppel Sigwart Compressed gas switch
US1976445A (en) * 1931-03-25 1934-10-09 Shand & Jurs Company Valve control system
US2144372A (en) * 1935-01-30 1939-01-17 Bbc Brown Boveri & Cie Electric circuit breaker
US2281042A (en) * 1940-01-11 1942-04-28 Westinghouse Electric & Mfg Co Circuit interrupter
US2282154A (en) * 1940-01-13 1942-05-05 Westinghouse Electric & Mfg Co Circuit interrupter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL115273C (me) * 1943-06-28

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1289339A (en) * 1915-08-31 1918-12-31 Westinghouse Electric & Mfg Co Valve-control mechanism.
US1937482A (en) * 1928-09-18 1933-11-28 Ruppel Sigwart Compressed gas switch
US1976445A (en) * 1931-03-25 1934-10-09 Shand & Jurs Company Valve control system
US2144372A (en) * 1935-01-30 1939-01-17 Bbc Brown Boveri & Cie Electric circuit breaker
US2281042A (en) * 1940-01-11 1942-04-28 Westinghouse Electric & Mfg Co Circuit interrupter
US2282154A (en) * 1940-01-13 1942-05-05 Westinghouse Electric & Mfg Co Circuit interrupter

Also Published As

Publication number Publication date
GB623921A (en) 1949-05-25
DE959929C (de) 1957-03-14
BE473866A (me)
CH256943A (de) 1948-09-15
FR947876A (fr) 1949-07-15

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