US3686453A - Gas-blast circuit breaker - Google Patents

Gas-blast circuit breaker Download PDF

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Publication number
US3686453A
US3686453A US161652A US3686453DA US3686453A US 3686453 A US3686453 A US 3686453A US 161652 A US161652 A US 161652A US 3686453D A US3686453D A US 3686453DA US 3686453 A US3686453 A US 3686453A
Authority
US
United States
Prior art keywords
contact member
cylinder
circuit breaker
piston
stationary
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
US161652A
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English (en)
Inventor
Carl-Dieter Floessel
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.)
BBC Brown Boveri AG Germany
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri France SA
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 BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
Application granted granted Critical
Publication of US3686453A publication Critical patent/US3686453A/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
    • H01H33/80—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve
    • H01H33/82—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas
    • H01H33/83—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas wherein the contacts are opened by the flow of air or gas

Definitions

  • a contact system for an electrical circuit breaker of 1F fljc the gas-blast type includes a tubular stationary contact member and two concentrically arranged tubular movable contact members actuated respectively by piston and cylinder units structurally incorporated into the contact members.
  • the inner one of the movable contact members which is designed as a nozzle abuts the stationary contact member, and the outer one of the movable contact members bridges the abutted contact members and serves to ensure carrying of the current through the circuit breaker contacts.
  • the inner movable contact member is provided with a piston portion slidable in a cylinder formed within the outer movable contact member, and the outer movable contact member includes a piston portion slidable in a longitudinally displaceable cylinder which itself is slidably mounted in a stationary cylinder.
  • the outer one of the movable contact members is actuated first within its cylinder, it then entrains the inner one of the movable contact members to separate it from the stationary contact member, and thereafter also entrains its cylinder causing the latter to be displaced 10 Claims, 3 Drawing Figures PATENTEDwszz m2 SHEET 2 OF 2 Fig.3
  • the trailing bum-off contact member is constructed as a piston, being closed on one side, and being slidably supported in the tubular main contact member, the main contact member being constructed in cylindrical form. with ports for the propelling gas.
  • Japanese Laid-open Specification 38-22517 is disclosed in Japanese Laid-open Specification 38-22517.
  • the present invention is based on a gas-blast circuit breaker with a contact system of the kind mentioned hereinabove and it is the principal object of the invention to provide a driving means for the contacts which will establish a rapid motion for the contact members, subject to highly effective damping over a short distance of the motion towards the end of the stroke.
  • this objective is achieved in a simple manner by virtue of the contact member being provided with a reversal collar, movable relative to the contact member which is supported in a movable cylinder component provided with inlet ports, the cylinder in turn being slidably supported in a stationary cylinder so that the cylinder component is entrained by the contact member towards the end of the. make or break movement to effect damping of the motion while the reversal collar prevents the opposite side, in each case, of the contact member driving piston being biased by pressurized gas during the appropriate and related switching movement.
  • FIG. 2 is a partial cross-section of the switching means shown along the line II-II of FIG. 1;
  • FIG. 3 shows the switching means of FIG. 1 in the off position.
  • the improved switching means for the circuit breaker is designated in its entirety by numeral 2, and is disposed in an insulated manner, not shown, in the interior of a metallic enclosure 1, as illustrated in FIG. 11.
  • the switching means 2 includes a tubular insulator member 3 having an upper portion of reduced crosssection within which a stationary contact member 4 is 5 joined to a housing 7 which contains an annular gap chamber 8 between two walls thereof, the gap chamber being pennanently connected at the position shown by an arrow, and by means of a duct, not shown, to a vessel containing the arc extinction gas at high pressure.
  • Ports 8a of housing 7 are closed when the circuit breaker is in a steady-state position, e.g. with the contacts closed, and are released during the switching operation by brief opening of a blast valve which is actuated in known manner by a drive through driving rod 9a of which several may be provided.
  • the closed position of blast valve 9 is indicated in broken lines in FIG. l.
  • the stationary nozzle contact member 5 is adapted to engage a cylindrical nozzle contact member 10.
  • the latter contact member which functions, during a break movement of the circuit breaker, as a trailing burn-off contact, is adapted to slide within a cylindrical hollow main contact member 11.
  • the cylindrical contact member I l is engaged with the cup contact member 6, its function being the continuous transmission of current through the contact mechanism of the circuit breaker.
  • Contact member 11 is provided with an expanded part 12 in which the driving piston 10a of the nozzle contact member 310 is adapted to slide.
  • the expanded part 12 is also provided with ports 12a, 12b which can be optionally closed by a reversal collar 13 adapted to slide within a chamber part 12d.
  • Spring 14 is supported between the parts 10a and 13.
  • Part 13 is also provided with several ports 13a.
  • the expanded part 12 of contact member 11 is slidably supported within the cylindrical part 15 in the manner of a piston l2c.
  • the cylinder part 15 contains ports 15a and in turn is slidably supported within and by an outer cylinder 16. This latter cylinder is stationary and in an appropriate embodiment forms part of the housing 7. It contains inlet ports 16a and 16b.
  • the interior of the enclosure 1 and of the switching means 2 is constantly filled with gas at low-pressure, for example SP Ifthe circuit breaker is to be switched off, starting from the make position of FIG. I, blast valve 9 is actuated by the one or more drive rods 9a into the illustrated position so that gas at high pressure can flow from the annular gap chamber 8 into the low-pressure part of the circuit breaker as indicated by the direction of flow arrows.
  • the bottom portion of the expanded part 12, constructed as a piston 12c is thus acted upon by the pressurized gas entering through ports 16a, 15a and ll2a and is thus moved downwardly. Ports 12b will then be closed by the reversal collar 13.
  • Chamber 17 communicates through ports 15!; and 160 and ducts 18 with the low-pressure part of the circuit breaker until close to the end of the break motion.
  • the separating contact members and 5 are blown upon in known manner by the high pressure gas, the arc extinction gases which are created being caused to flow through these tubular contact members into the low-pressure part of the circuit breaker.
  • Chamber 19 will then become the compression chamber while chamber 19' serves as the suction chamber in performing the damping process.
  • any make arc which may occur between the closing contacts is then blown upon in known manner.
  • Contact member 11 is maintained in a defined manner in its two limiting positions by ratchet means which are not shown.
  • a gas-blast circuit breaker having a contact system including a movable main contact member and a trailing burn-off contact member both of which are pneumatically actuated by respective piston and cylinder units in relation to a stationary contact member, said main contact member being provided with a relatively movable reversal member and including a piston slidable within a ported displaceable cylinder which is itself slidable in a stationary cylinder, said displaceable cylinder being entrained by said main contact member towards the end of the opening and closing motion of the latter to damp such motion, and said reversal member being operable to prevent the gas pressure which biases the piston of the bum-off contact unit from also exerting on the unit of the main contact a thrust opposing the intended movement of said main contact member.
  • each piston and cylinder unit comprises an axially movable cylinder within which is an axially movable piston integral with one or the other of said movable contact members.

Landscapes

  • Circuit Breakers (AREA)
US161652A 1970-08-07 1971-07-12 Gas-blast circuit breaker Expired - Lifetime US3686453A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1191170A CH519778A (de) 1970-08-07 1970-08-07 Druckgasschalter

Publications (1)

Publication Number Publication Date
US3686453A true US3686453A (en) 1972-08-22

Family

ID=4378092

Family Applications (1)

Application Number Title Priority Date Filing Date
US161652A Expired - Lifetime US3686453A (en) 1970-08-07 1971-07-12 Gas-blast circuit breaker

Country Status (5)

Country Link
US (1) US3686453A (de)
CH (1) CH519778A (de)
DE (2) DE7033575U (de)
FR (1) FR2103943A5 (de)
GB (1) GB1295557A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4961052U (de) * 1972-09-07 1974-05-29
US4296289A (en) * 1978-04-19 1981-10-20 Sprecher & Schuh Ag Electric gas-blast switch
US20080011719A1 (en) * 2004-12-23 2008-01-17 Abb Technology Ag Heavy-duty circuit-breaker with sealing against hot gas
US20110084048A1 (en) * 2009-10-08 2011-04-14 Abb Technology Ag Circuit breaker with parallel rated current paths

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0642347B2 (ja) * 1981-11-12 1994-06-01 三菱電機株式会社 開閉装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3529108A (en) * 1966-09-01 1970-09-15 Westinghouse Electric Corp Nozzle and contact construction for fluid-blast circuit interrupters
US3590187A (en) * 1970-01-21 1971-06-29 Westinghouse Electric Corp Separable contact and blast-valve structure for a compressed-gas circuit breaker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB872864A (en) * 1956-11-08 1961-07-12 Ass Elect Ind Improvements in and relating to air or gas blast circuit-breakers
DE1465363B2 (de) * 1964-03-14 1970-06-11 Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen Druckgasschalter
DE3621861A1 (de) 1986-06-30 1988-01-14 Laszlo Dr Med Ilg Verwendung von aryloxycarbonsaeure-derivaten gegen dermatologische erkrankungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3529108A (en) * 1966-09-01 1970-09-15 Westinghouse Electric Corp Nozzle and contact construction for fluid-blast circuit interrupters
US3590187A (en) * 1970-01-21 1971-06-29 Westinghouse Electric Corp Separable contact and blast-valve structure for a compressed-gas circuit breaker

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4961052U (de) * 1972-09-07 1974-05-29
JPS562334Y2 (de) * 1972-09-07 1981-01-20
US4296289A (en) * 1978-04-19 1981-10-20 Sprecher & Schuh Ag Electric gas-blast switch
US20080011719A1 (en) * 2004-12-23 2008-01-17 Abb Technology Ag Heavy-duty circuit-breaker with sealing against hot gas
US7732727B2 (en) * 2004-12-23 2010-06-08 Abb Technology Ag Heavy-duty circuit-breaker with sealing against hot gas
US20110084048A1 (en) * 2009-10-08 2011-04-14 Abb Technology Ag Circuit breaker with parallel rated current paths
CN102034640A (zh) * 2009-10-08 2011-04-27 Abb技术有限公司 具有并联额定电流路径的功率开关
US8901447B2 (en) 2009-10-08 2014-12-02 Abb Technology Ag Circuit breaker with parallel rated current paths
CN102034640B (zh) * 2009-10-08 2015-10-21 Abb技术有限公司 具有并联额定电流路径的功率开关

Also Published As

Publication number Publication date
GB1295557A (de) 1972-11-08
FR2103943A5 (de) 1972-04-14
DE7033575U (de) 1972-05-31
DE2044643B2 (de) 1980-09-18
CH519778A (de) 1972-02-29
DE2044643A1 (de) 1972-02-10
DE2044643C3 (de) 1981-05-14

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