US3251970A - Resetting control apparatus for switchgear - Google Patents

Resetting control apparatus for switchgear Download PDF

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Publication number
US3251970A
US3251970A US179567A US17956762A US3251970A US 3251970 A US3251970 A US 3251970A US 179567 A US179567 A US 179567A US 17956762 A US17956762 A US 17956762A US 3251970 A US3251970 A US 3251970A
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US
United States
Prior art keywords
pressure
space
contact
exhaust valve
valve means
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
US179567A
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English (en)
Inventor
Gonek Stanislaw Mieczyslaw
Rowlinson Henry
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.)
English Electric Co Ltd
Original Assignee
English Electric Co Ltd
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 English Electric Co Ltd filed Critical English Electric Co Ltd
Application granted granted Critical
Publication of US3251970A publication Critical patent/US3251970A/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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/86—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve
    • 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

  • control apparatus for switchgear comprises exhaust valve means which is opened in response to movement of an operating mechanism to cause an operation of a circuit breaker and resetting means actuated by the operation of said circuit-breaker to reset said ope-rating mechanism and thereby to allow said exhaust valve to reclose.
  • the invention will be described as applied to a single circuit-breaker though it will be appreciated that two circuit-breakers are commonly employed in series, in which case the structure will be symmetrical about the line XX and the control apparatus will operate in the same fashion with respect to the second circuit-breaker as with respect to that described.
  • the circuit interrupter shown generally at 12 is mounted on a common central casing 23 by means of which it is connected to the other circuit-breaker in series.
  • the operation of the circuit-breakers is controlled by a common exhaust valve 18 which may be operated to place the common outlet passage 20 of the circuit-breakers in communication with the atmosphere through passages 22.
  • the circuit-breakers are also connected through a common passage 21 to a source of gas pressure.
  • gas will be referred to as air though it will be understood that any other suitable gas may be em ployed.
  • the line connection 10 is connected to an endplate 24 on which is mounted a contact 25, the endplate being supported from the central casing 23 by means of a porcelain insulator 26.
  • the contact 25 is mounted for limited movement, but is'usually referred to in the art as the fixed contact.
  • Co-ope-rating with fixed contact 25 is a moving contact 27 which is arranged to slide within the cylinder 28 which forms part of the casing 23.
  • the moving contact 27 is connected to a piston 29 by means of a rod 30.
  • the rod co-operates with a lever 31 pivoted at 32 which engages a collar 33 to compress a spring 34 which is situated between the collar and the pivotally-mounted collar '35.
  • the arrangement is such 'as to give a toggle action, the spring 34 urging the moving contact 27 to each of its extreme positions.
  • the pass-age 21 forms part of the base of the central casing 23 and communicates with a space 36 surrounding the co-operating contacts 25, 2-7.
  • the space 37 within the cylinder 28 is not in communication with the space 36 when the contacts 25, 27 are closed but communicates directly with the passage 20 and thus with the exhaust valve 18.
  • the ducts 22 are formed in the casing 38 of the exhaust valve 18.
  • the valve is of the balanced type and is loaded to the closed position by. a spring 39.
  • the interior of the casing 38 is connected through a conduit 40 with the space 36 so that it is in communication with the pressure source.
  • the valve is provided with an annular operating piston 41, the space below which can be placed in communication either with the pressure source or with atmosphere.
  • the operating mechanism comprises a vertical rod 58 which is biased upward by a spring 59 so as to move upward when the operating detent (not shown) is tripped.
  • a lever 60 pivoted near its centre is connected at one end to the rod 58 and at its other end to the cent-re of a bellcrank lever 61, the ends of which are connected respectively to an operating mechanism, in the form of rod 62, and to a rod 63 which is connected in turn to the end of lever 31 remote from the rod 30.
  • the operating rod 62 has adjacent each end a valve member; the valve members 64, 65 are loaded respectively by springs 66, 67 towards the operating rod.
  • One valve member 64 is in communication through conduit 68 with the space 69 on the left of piston 29 as seen in the drawing; in one position (that toward which it is spring-loaded) the valve member 64 places the space 69 in communication through conduit 70 with the passage 21, and in the other position it places the space 69 in communication with atmosphere through port 71.
  • the space 72 on the right of piston 29 is in communication through conduit 73 with the passage 20.
  • the other valve member 65 is in communication through conduit 74 with the space 75 below the annular operating piston 41 of the exhaust valve 18, and in the position toward which it is spring-loaded places the space 75 in communication with atmosphere through port 76; in its other position it places the space in communication with the passage 21 through conduit 77.
  • first pressure-responsive means connected to said movable hollow contact to move it between said open and closed positions, means defining a first pressure space on one side of said pressure-responsive means, means defining a second pressure space on the other side of said pressure-responsive means, resilient means urging said movable hollow contact to both open and closed positions, second pressure-respom sive means connected to said exhaust valve means to perate it, means defining a third pressure space on one side of said second pressure-responsive means such that increase of pressure in said third pressure space tends to open said exhaust valve means, resilient means loading said exhaust valve means in the sense of closing, first valve means connected to said pressure source and to said first pressure space, and having a first port opening to low pressure, said first valve means having a first position in which said first pressure space is connected to said pressure source, and a second position in which said first pressure space is connected to said first port, spring bias means to bias said first valve means to its first position, second valve means connected to said
  • bias means to bias said second valve means to its first position, an operating member positioned to operate said first valve means and said second valve means, said operating member having a first neutral position, a second position in which it moves said first valve means from its first position to its second position, and a third position in which it moves said second valve means from its first position to its.
  • Electric switchgear comprising a pair of cooperating contacts, one of which is a movable hollow contact, having a closed position and an open position, means defining a first space in which said contacts are situated, a pressure source, a free communication from said pressure source to said first space, a second space in communication with the interior of said movable hollow contact, exhaust valve means, a connection from said second space to said exhaust valve means, first pressure-responsive means connected to said movable hollow contact to move it between said open and closed positions, means defining a first pressure space on one side of said pressure-responsive means and connected to said pressure source, means defining a second pressure space' on the other side of said pressure-responsive means and in communication with said exhaust valve means, resilient means urging said movable hollow contact to both open and closed positions, second pressure-responsive means connected to said exhaust valve means to operate it, means defining a third pressure space on one side of said second responsive-pressure means to load it in the sense of opening'said exhaust valve means, resilient means to bias said exhaust valve means in the sense of
  • Electric switchgear comprising a pair of cooperating contacts, one of which is a movable hollow' contact, having a closed position and an open position, means defining a first space in which said contacts are situated, a pressure source, a free communication from said pressure source to said first space, a second space in communication with the interior of said movable hollow contact, exhaust valve means, a connection from said second space to said exhaust valve means, first pressure-responsive means connected to said movable hollow contact to move it between said open and closed positions, means defining a first pressure space on one side of said pressureresponsive means and connected to said pressure source,
  • Electric switch gear comprising a pair of cooperating contacts, one of which is a movable hollow contact, having a closed position and an open position, means defining a first space in which said contacts are situated, a pressure source, a free communication from said pressure source to said first space, a second space in communication with the interior of said movable hollow contact, exhaust valve means, a connection from said second space to said exhaust valve means, pressure-responsive means connected to said movable hollow contact to move it between said open and closed positions, means defining a pressure space on one side of said pressure-responsive means such that a reduction of pressure in said pressure space urges said movable hollow contact in the sense of opening, said pressure space being in communication with said exhaust valve means, an operating member operative to open said exhaust valve means on movement in one sense and to close said exhaust valve means on movement in the other sense, whereby movement of said operating member in said one sense causes said exhaust valve means to open thereby causing a fall of pressure in said pressure space and thereby causing movement of said hollow movable contact to its open position
  • Electric switchgear comprising a pair of cooperating contacts, one of which is a movable hollow contact, having a closed position and an open position, means defining a first space in which said contacts are situated, a pressure source, a free communication from said pressure source to said first space, a second space in communication with the interior of said movable hollow contact, exhaust valve means, a connection from said second space to said exhaust valve means, pressure-responsive means connected to said movable hollow contact to move it between said open and closed positions, means defining a pressure space on one side of said pressure-responsive means, operating means comprising a valve to vent said pressure space to a low pressure, whereby on actuation of said operating means the pressure in said pressure space is reduced and said hollow movable contact moves in the direction of closing, and resetting means interconnecting said hollow movable contact and said operating means whereby on movement of said hollow movable contact to said closed position, said operating means is reset.
  • Electric switchgear comprising a fixed contact, a movable contact, and means for opening and closing said contacts, said means comprising a cylinder, 2.
  • piston in the cylinder connected to the movable contact, means supplying air under pressure to both sides of the piston at each end of the stroke, and means for exhausting the air on one side of the piston when at one end of the stroke whereby the pressure on the other sideof the piston moves it to the other end of the stroke.
  • a device as in claim 6 further comprising means supplying air under pressure between the contacts simultaneously with the movement of the movable contact away from the fixed contact.
  • a device as in claim 6 further comprising resilient means urging the piston to each of its extreme positions.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Circuit Breakers (AREA)
US179567A 1961-03-17 1962-03-14 Resetting control apparatus for switchgear Expired - Lifetime US3251970A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9803/61A GB1023151A (en) 1961-03-17 1961-03-17 Improvements in or relating to gas-blast circuit-breakers
NL6406509A NL6406509A (US06312121-20011106-C00033.png) 1961-03-17 1964-06-09
FR977566A FR1439845A (fr) 1961-03-17 1964-06-09 Appareil de commande pour disjoncteurs
BE649003 1964-06-09

Publications (1)

Publication Number Publication Date
US3251970A true US3251970A (en) 1966-05-17

Family

ID=27158995

Family Applications (1)

Application Number Title Priority Date Filing Date
US179567A Expired - Lifetime US3251970A (en) 1961-03-17 1962-03-14 Resetting control apparatus for switchgear

Country Status (8)

Country Link
US (1) US3251970A (US06312121-20011106-C00033.png)
BE (1) BE649003A (US06312121-20011106-C00033.png)
CH (1) CH394344A (US06312121-20011106-C00033.png)
DE (1) DE1275186B (US06312121-20011106-C00033.png)
FR (1) FR1439845A (US06312121-20011106-C00033.png)
GB (1) GB1023151A (US06312121-20011106-C00033.png)
NL (1) NL6406509A (US06312121-20011106-C00033.png)
SE (1) SE301829B (US06312121-20011106-C00033.png)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492452A (en) * 1965-09-27 1970-01-27 English Electric Co Ltd Protective switching devices for capacitors,with movable contacts within arcing electrodes and exhaust valve means
US4029922A (en) * 1974-10-01 1977-06-14 Asea Aktiebolag Operating device for enclosed high voltage circuit breakers
US20100014218A1 (en) * 2008-07-15 2010-01-21 Mitsubishi Electric Corporation Power switchgear

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1304286A (en) * 1919-05-20 Valve-gear
US2213658A (en) * 1938-01-14 1940-09-03 Bbc Brown Boveri & Cie Circuit breaker control system
US2275885A (en) * 1940-01-30 1942-03-10 Gen Electric Electric circuit breaker
US3043940A (en) * 1958-01-10 1962-07-10 Westinghouse Electric Corp Compressed-gas circuit interrupter
US3163737A (en) * 1960-03-23 1964-12-29 English Electric Co Ltd Gas blast circuit breaker and operating means therefor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB764647A (en) * 1954-02-17 1956-12-28 Asea Ab Improvements in air blast electric circuit breakers
US2803724A (en) * 1954-06-04 1957-08-20 Asea Ab Operating device for air blast circuit breakers
GB803628A (en) * 1955-10-05 1958-10-29 Asea Ab Air blast electric circuit breaker
GB806232A (en) * 1956-04-14 1958-12-23 Asea Ab Improvements in electric air blast circuit breakers
CH362447A (de) * 1957-06-29 1962-06-15 Asea Ab Druckluftschalter mit von Isolatorsäulen getragenen, ständig mit Druckluft gefüllten, spannungsführenden Behältern, in denen die Leistungstrennstellen angeordnet sind

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1304286A (en) * 1919-05-20 Valve-gear
US2213658A (en) * 1938-01-14 1940-09-03 Bbc Brown Boveri & Cie Circuit breaker control system
US2275885A (en) * 1940-01-30 1942-03-10 Gen Electric Electric circuit breaker
US3043940A (en) * 1958-01-10 1962-07-10 Westinghouse Electric Corp Compressed-gas circuit interrupter
US3163737A (en) * 1960-03-23 1964-12-29 English Electric Co Ltd Gas blast circuit breaker and operating means therefor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492452A (en) * 1965-09-27 1970-01-27 English Electric Co Ltd Protective switching devices for capacitors,with movable contacts within arcing electrodes and exhaust valve means
US4029922A (en) * 1974-10-01 1977-06-14 Asea Aktiebolag Operating device for enclosed high voltage circuit breakers
US20100014218A1 (en) * 2008-07-15 2010-01-21 Mitsubishi Electric Corporation Power switchgear
US7796374B2 (en) * 2008-07-15 2010-09-14 Mitsubishi Electric Corporation Power switchgear

Also Published As

Publication number Publication date
CH394344A (fr) 1965-06-30
NL6406509A (US06312121-20011106-C00033.png) 1965-12-10
BE649003A (US06312121-20011106-C00033.png) 1964-10-01
DE1275186B (de) 1968-08-14
GB1023151A (en) 1966-03-23
SE301829B (US06312121-20011106-C00033.png) 1968-06-24
FR1439845A (fr) 1966-05-27

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