US3659065A - Fluid-blast circuit interrupter with delayed moving contact travel - Google Patents

Fluid-blast circuit interrupter with delayed moving contact travel Download PDF

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Publication number
US3659065A
US3659065A US17198A US3659065DA US3659065A US 3659065 A US3659065 A US 3659065A US 17198 A US17198 A US 17198A US 3659065D A US3659065D A US 3659065DA US 3659065 A US3659065 A US 3659065A
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US
United States
Prior art keywords
fluid
movable
piston
circuit interrupter
contact
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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
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US17198A
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English (en)
Inventor
Robert Michael Roidt
Bruce W Swanson
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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Publication date
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Publication of US3659065A publication Critical patent/US3659065A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/52—Driving mechanisms, i.e. for transmitting driving force to the contacts with means to ensure stopping at intermediate operative positions
    • 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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/904—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism characterised by the transmission between operating mechanism and piston or movable contact

Definitions

  • a fluid-blast circuit interrupter having a pair of separable contacts, the moving contact of which has two PP 17,198 delayed periods during its opening travel, the first of which is during the time of increasing fluid pressure resulting from piston-generating action, with a relatively short arc length, Cl "200/148 200/148 A and the second delayed period of the movable contact is dur- Int. Cl.
  • a fluid-blast circuit interrupter of the movable piston type in which the movable contact has an independent motion, as contrasted with the movement of the movable piston.
  • a means such as a cam having a cam shape, such that the movable contact has two delayed periods, or dwell periods, during its opening movement, the first of which occurs during the buildup of fluid pressure by piston action, and the second delayed period is during the time of arcing, at which the arc is maintained at a desired minimum length, and receives the full effect of the cumulative increased pistongenerated fluid blast.
  • FIG. 1 illustrates a perspective view of a three-pole circuit interrupter embodying the principles of the present invention
  • FIG. 2 is a considerably-enlarged longitudinal sectional view taken through one of the pole-units of FIG. I, the contact structure being illustrated in the closed-circuit position;
  • FIGS. 3 and 4 fragmentarily illustrate the separation of the contact structure at different distances, and illustrating the two delayed periods
  • FIG. 5 illustrates the fully open-circuit position of the movable contact structure
  • FIGS. 6 and 7 illustrate sectional views taken through the circuit interrupter along the lines VlVI and VII-VII, respectively, of FIGS. 2 and 5;
  • FIGS. 8 and 9 illustrate details of the cam operation.
  • each pole-assembly includes, generally, an upper end plate 2, a generally upstanding cylindrical housing 3, and a lower end plate and mechanism housing 4. Disposed exteriorly of the mechanism housing 4 is a drive-crank 5, affixed to an operating shaft 6, and a generally horizontally reciprocally movable insulating operating rod 7 is pivotally secured to the external operating crank 5, as at 8, and is connected to a drive-crank 9 through a pivotal connection 10.
  • the three drive-cranks 9, only one of which is shown, are affixed and rotatable with an operating drive-shaft 11, which is connected to a suitable mechanism 12, which constitutes no part of the present invention, and may be of the type set forth in U.S. Pat. No. 3,183,332, issued May ll, 1965 to Russell E. Frink and Paul Olsson, and assigned to the assignee of the present invention.
  • a suitable supporting grounded framework 14 comprising vertical channel members 15 with interbracing structural steel members 16, having horizontally extending insulating support straps 16b secured thereto, which assist in supporting the interrupting assemblies.
  • lower insulator supports 17 may be employed extending generally horizontally from a channel support member 16c, the latter being affixed to the vertical support channels 15.
  • FIGS. 2, 6 and 7 more clearly illustrate the internal construction of each of the interrupting assemblies.
  • the cylindrical housing 3 of a suitable insulating material having at one end thereof the end closure plate 2 having a line-terminal connection 2a constituting an integral part thereof.
  • the operating casting 4 At the opposite end of the tubular housing 3 is the operating casting 4, within which extends the rotatable operating shaft 6 having affixed thereto, as by a key pin 18, an internally disposed operating crank 19, the latter being pivotally connected, as at 20, to a pair of metallic operating links 21.
  • the upper ends of the operating links 21, as viewed in FIGS. 2, 3 and 5, are pivotally connected to a pivot pin 22, the latter extending through apertures 23 provided in a spider-like actuator 24, which is fastened, to the end 26a of a movable operating cylinder 26 having a closed-end plate portion 26b.
  • the movable contact structure 29 of the puffer-type circuit interrupter comprises the movable piston cylinder 26 having an annular piston-driving portion 26b, which has its working travel within a compression chamber 31, and generates fluid within this chamber 31 to move through the ducts 32 provided in the insulating nozzle 33 and force fluid into the arc 34 (FIG. 4).
  • a movable contact 35 engages the stationary contact fingers 30 in the closed position of FIG. 2. It has a follower operating rod 38 with a follower roller 40 to follow the cam surface 360 of a rotatable cam 36.
  • the movable contact 35 has two delayed periods, the first of which is illustrated in FIG. 3 of the drawings.
  • the arc 34 established is of minimum length, and the pressure is being built up during this time within the compression chamber 31.
  • transient pressure surges associated with the striking of the arc are allowed to decay and hence, to prevent transient back pressures upon the piston.
  • FIG. 4 illustrates the second position of the are 34, at which time it is receiving the full blasting effect from the pistongenerated fluid pressure.
  • the movement of the movable contact 35 is independent of the motion of the annular driving piston 26b and the piston cylinder 26.
  • This is achieved by the cam 36, which is fixedly secured to, and movable with, the operating shaft 6 extending laterally out of the lower mechanism housing 4.
  • the cam 36 has a configured surface 360, such that the movable contact 35, biased toward a closed'position by a compression spring 37, nevertheless must follow the contour of the cam surface 360, and thereby is compelled to have two delaying positions, as illustrated in FIGS. 3 and 4 of the drawings.
  • the operating shaft 6 has a pair of spaced crank-arms 19a, 19b affixed thereto, and movable therewith, the outer free ends of which are pivotally secured, as at 20, to a pair of floating metallic links 21, which are pivotally connected to the movable spider member 24, thereby actuating the operating piston cylinder 26.
  • the advantage of the present invention results from the fact that the independent motion of the movable venting contact 35 assures a buildup of adequate fluid pressure by maintaining the arc 34 during this time at a minimum length, as illustrated in FIG. 3.
  • the arc voltage and arc-generated pressure is consequently at a minimum during this time.
  • the cam contour 36a is such as to pick up the movable contact 35 and move it to its second delayed position, as shown in H6. 4.
  • the are 34 is receiving the full impact of the radially inwardly directed fluid pressure to bring about fast arc extinction.
  • FIG. 2 illustrates, to an enlarged scale, the cam contour 36a and the several legends indicate the positions of the movable contact 35 during the rotation of the cam 36.
  • the fluid is exhausted through the movable tubular contact 35 and also through a tubular stationary arcing contact 43.
  • a valve plate 46 closes during the working stroke of the annular piston 26b, and opens during the closing travel of the piston to facilitate contact closing.
  • a fluid-blast piston-type circuit interrupter including, in combination:
  • separable contact means including a pair of cooperable contacts, at least one of which is movable and the other relatively stationary;
  • operating means for the circuit interrupter effective to cause the movable contact to assume two consecutive open delaying arcing positions one of short arc length and the other of longer arc length;
  • piston means includes a movable operating piston cylinder linked to an operating shaft, and a cam fixedly secured to said operating shaft and causing the independent motion of the movable contact.
  • a piston-type of fluid-blast circuit interrupter including, in combination:
  • a relatively stationary venting contact cooperable with a movable venting contact to establish an arc
  • a movable piston structure for forcing generated fluid pressure toward the established are including a movable piston
  • d. sai operating means including means for causing two delayed positions of the movable venting contact
  • fluid-directing means to cause radially inwardly directed fluid pressure to exhaust in substantially opposite directions through both cooperable venting contacts.

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  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US17198A 1970-03-06 1970-03-06 Fluid-blast circuit interrupter with delayed moving contact travel Expired - Lifetime US3659065A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1719870A 1970-03-06 1970-03-06

Publications (1)

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US3659065A true US3659065A (en) 1972-04-25

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US17198A Expired - Lifetime US3659065A (en) 1970-03-06 1970-03-06 Fluid-blast circuit interrupter with delayed moving contact travel

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Country Link
US (1) US3659065A (https=)
JP (1) JPS5138425B1 (https=)
AU (1) AU2571371A (https=)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824360A (en) * 1971-08-06 1974-07-16 Siemens Ag Compressed gas electrical circuit breaker
FR2237296A1 (https=) * 1973-07-12 1975-02-07 Sprecher & Schuh Ag
US3946183A (en) * 1974-04-05 1976-03-23 Westinghouse Electric Corporation Puffer piston gas blast circuit interrupter with insulating nozzle member
US3955057A (en) * 1973-10-01 1976-05-04 Brown, Boveri & Cie. A.G. Electric switch
US3956605A (en) * 1974-05-20 1976-05-11 Westinghouse Electric Corporation Fluid blast circuit interrupter with a compact nozzle structure and versatile operating mechanism
US4048456A (en) * 1976-04-01 1977-09-13 General Electric Company Puffer-type gas-blast circuit breaker
US4107498A (en) * 1976-01-15 1978-08-15 Westinghouse Electric Corp. Disconnect switch and drive mechanism therefor
FR2379149A1 (fr) * 1977-01-27 1978-08-25 Siemens Ag Disjoncteur electrique
US4139752A (en) * 1975-05-30 1979-02-13 Mitsubishi Denki Kabushiki Kaisha Gas-type circuit-breaker
FR2398378A1 (fr) * 1977-07-21 1979-02-16 Mitsubishi Electric Corp Interrupteur de circuit
US4199671A (en) * 1978-01-30 1980-04-22 Westinghouse Electric Corp. Puffer circuit breaker
US4289942A (en) * 1977-07-29 1981-09-15 Westinghouse Electric Corp. Gas-blast circuit-interrupter with multiple insulating arc-shield construction
US4328403A (en) * 1977-02-15 1982-05-04 Westinghouse Electric Corp. Single barrel puffer circuit interrupter
EP0564058A1 (de) * 1992-03-31 1993-10-06 Siemens Aktiengesellschaft Elektrischer Hochspannungs-Leistungsschalter
US5510591A (en) * 1993-01-12 1996-04-23 Gec Alsthom T & D Sa High tension circuit breaker capable of interrupting fault currents having a delayed zero crossing
US5604340A (en) * 1994-05-23 1997-02-18 Hitachi, Ltd. Gas insulated switchgear insertion resistor and main contacts operating mechanism having time delay feature
EP0921549A1 (en) * 1997-12-09 1999-06-09 Elin Holec High Voltage B.V. Method for extinguishing an arc in a power circuit-breaker by means of a gas stream, and power circuit-breaker
US6410873B1 (en) * 1999-01-15 2002-06-25 Siemens Aktiengesellschaft High voltage circuit breaker, especially a gas-blast circuit breaker
US20080078668A1 (en) * 2006-09-29 2008-04-03 Areva T & D Sa Actuating the oppositely-moving contacts of an interrupting chamber by a cylindrical cam
US20080083704A1 (en) * 2006-10-09 2008-04-10 Areva T&D Sa Actuating the contacts of an interrupting chamber in opposite directions via an insulating tube
US20110204725A1 (en) * 2010-02-24 2011-08-25 Adrian Shipley Electromagnetic circuit interrupter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH088032B2 (ja) * 1990-06-26 1996-01-29 株式会社日立製作所 ガス遮断器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3226513A (en) * 1962-10-19 1965-12-28 Bbc Brown Boveri & Cie Compressed gas actuated circuit breaker having a dwell phase in the opening stroke of the movable contact

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3226513A (en) * 1962-10-19 1965-12-28 Bbc Brown Boveri & Cie Compressed gas actuated circuit breaker having a dwell phase in the opening stroke of the movable contact

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824360A (en) * 1971-08-06 1974-07-16 Siemens Ag Compressed gas electrical circuit breaker
FR2237296A1 (https=) * 1973-07-12 1975-02-07 Sprecher & Schuh Ag
US3955057A (en) * 1973-10-01 1976-05-04 Brown, Boveri & Cie. A.G. Electric switch
US3946183A (en) * 1974-04-05 1976-03-23 Westinghouse Electric Corporation Puffer piston gas blast circuit interrupter with insulating nozzle member
US3956605A (en) * 1974-05-20 1976-05-11 Westinghouse Electric Corporation Fluid blast circuit interrupter with a compact nozzle structure and versatile operating mechanism
US4139752A (en) * 1975-05-30 1979-02-13 Mitsubishi Denki Kabushiki Kaisha Gas-type circuit-breaker
US4107498A (en) * 1976-01-15 1978-08-15 Westinghouse Electric Corp. Disconnect switch and drive mechanism therefor
US4048456A (en) * 1976-04-01 1977-09-13 General Electric Company Puffer-type gas-blast circuit breaker
FR2379149A1 (fr) * 1977-01-27 1978-08-25 Siemens Ag Disjoncteur electrique
US4328403A (en) * 1977-02-15 1982-05-04 Westinghouse Electric Corp. Single barrel puffer circuit interrupter
FR2398378A1 (fr) * 1977-07-21 1979-02-16 Mitsubishi Electric Corp Interrupteur de circuit
US4289942A (en) * 1977-07-29 1981-09-15 Westinghouse Electric Corp. Gas-blast circuit-interrupter with multiple insulating arc-shield construction
US4199671A (en) * 1978-01-30 1980-04-22 Westinghouse Electric Corp. Puffer circuit breaker
EP0564058A1 (de) * 1992-03-31 1993-10-06 Siemens Aktiengesellschaft Elektrischer Hochspannungs-Leistungsschalter
US5510591A (en) * 1993-01-12 1996-04-23 Gec Alsthom T & D Sa High tension circuit breaker capable of interrupting fault currents having a delayed zero crossing
US5604340A (en) * 1994-05-23 1997-02-18 Hitachi, Ltd. Gas insulated switchgear insertion resistor and main contacts operating mechanism having time delay feature
EP0921549A1 (en) * 1997-12-09 1999-06-09 Elin Holec High Voltage B.V. Method for extinguishing an arc in a power circuit-breaker by means of a gas stream, and power circuit-breaker
NL1007753C2 (nl) * 1997-12-09 1999-06-23 Elin Holec High Voltage Bv Werkwijze voor het middels een gasstroom doven van een lichtboog bij een vermogens-schakelaar alsmede vermogens-schakelaar.
US6410873B1 (en) * 1999-01-15 2002-06-25 Siemens Aktiengesellschaft High voltage circuit breaker, especially a gas-blast circuit breaker
US20080078668A1 (en) * 2006-09-29 2008-04-03 Areva T & D Sa Actuating the oppositely-moving contacts of an interrupting chamber by a cylindrical cam
US7777149B2 (en) 2006-09-29 2010-08-17 Areva T&D Sa Actuating the oppositely-moving contacts of an interrupting chamber by a cylindrical cam
US7642480B2 (en) * 2006-10-09 2010-01-05 Areva T&D Sa Actuating the contacts of an interrupting chamber in opposite directions via an insulating tube
US20080083704A1 (en) * 2006-10-09 2008-04-10 Areva T&D Sa Actuating the contacts of an interrupting chamber in opposite directions via an insulating tube
US20110204725A1 (en) * 2010-02-24 2011-08-25 Adrian Shipley Electromagnetic circuit interrupter
GB2480608A (en) * 2010-05-24 2011-11-30 Ge Aviat Systems Ltd Electromagnetic circuit interrupter
CN102262967A (zh) * 2010-05-24 2011-11-30 通用电气航空系统有限公司 电磁电路中断器
US8564389B2 (en) 2010-05-24 2013-10-22 Ge Aviation Systems Limited Electromagnetic circuit interrupter
GB2480608B (en) * 2010-05-24 2015-04-01 Ge Aviat Systems Ltd Electromagnetic circuit interrupter
CN102262967B (zh) * 2010-05-24 2015-06-17 通用电气航空系统有限公司 电磁电路中断器

Also Published As

Publication number Publication date
AU2571371A (en) 1972-08-24
JPS462476A (https=) 1971-10-16
JPS5138425B1 (https=) 1976-10-21

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