US3786215A - Electrical compression switch - Google Patents

Electrical compression switch Download PDF

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Publication number
US3786215A
US3786215A US00202309A US3786215DA US3786215A US 3786215 A US3786215 A US 3786215A US 00202309 A US00202309 A US 00202309A US 3786215D A US3786215D A US 3786215DA US 3786215 A US3786215 A US 3786215A
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US
United States
Prior art keywords
piston
contact member
cylinder
driven contact
electrical switch
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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
Application number
US00202309A
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English (en)
Inventor
G Mauthe
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 Switzerland
BBC Brown Boveri France SA
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BBC Brown Boveri France SA
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Application filed by BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
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Publication of US3786215A publication Critical patent/US3786215A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H33/70—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
    • H01H33/884—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 with variable-area piston
    • 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
    • H01H2033/907—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 using tandem pistons, e.g. several compression volumes being modified in conjunction or sequential

Definitions

  • the invention is concerned with an electric compression switch whereby for the quenching of the electric are there is utilized a flow of the quenching medium, the flow being generated by a compression apparatus which comprises cylinders and pistons, its movable part, or parts, being connected with the movable switching part, and whereby an insulating nozzle is arranged in front of, and at a distance from the movable switching part in direction toward the counterswitching part.
  • a switch of this type is known, for example shown by Swiss Pat. No. 494,467.
  • a stationary switching part interacts with a hollow tripping pin which is rigidly connected to a blow-out cylinder.
  • the blow-out cylinder is pulled over a stationary piston, the blow-out cylinder carrying an insulating nozzle at its front side facing the stationary switching part.
  • the hollow tripping pin and the stationary switching part will form a sliding contact which remains closed during one half of the tripping pin travel, for the purpose of creating a precompression of the quenching medium at cut-off time; the switching part will then separate and thus release the flow of gas.
  • the movable switching part be surrounded by a circular auxiliary piston, and that this piston be provided with an energy-storing device in such manner that during the cut-off movement, the auxiliary piston will perform, under the influence of energy-storing device, a pre-compression stroke, while the loading of the energy-storing device during the switch-closing move ment takes place through coupling by shape to the movable switching part.
  • this manner it becomes possible to reduce significantly the travel up to contact separation, while keeping the pressure ratios for the pre-compression at identical levels, thus attaining a significant saving of time for the cut-off operation of the switch.
  • FIG. 1 gives a sectional view of a switching chamber with a single auxiliary piston
  • FIG. 2 shows a modification of the arrangement depicted by FIG. 1, whereby the auxiliary piston is designed in the form of a twin-piston.
  • FIG. 3 shows an auxiliary piston which, in further modification of FIG. 1, has a decoupling device
  • FIG. 4 shows a species whereby the auxiliary piston takes over simultaneously the function of a guide.
  • the support 2 for the stationary, but resiliently mounted switching part 5; the support being insulated from the metallic casing 1 by means not shown in the drawings.
  • the switching part5 is acted upon by the cup spring unit 6 which is placed in a housing-like part 2b of the support.
  • This part 2b is connected by several webs 2a with the support 2 within which there are placed finger-shaped laminated contacts 3 with their proper springs 4.
  • These laminated contacts 3 form a tulip-shaped counter-contact piece to part 9b.
  • This part 9b forms, together with the laminated contacts 3, a shunt contact device for the continuous current conduit to the switching parts 5, 9 between which the arc is forming during the cut-off operation.
  • Part 9b is fixedly connected with switching part 9 by means of webs 9a, and forms together with the insulating nozzle 10, fixedly connected with it, a blow-out piston which is slidingly guided within cylinder 8.
  • Parts 2 and 8 are stationary relative to each other,as indicated by insulating rod 7.
  • Cylinder 8 is closed off at its lower end by the base 8d, and is divided by the partition 8a in such manner that a chamber is formed for the auxiliary piston 11 and the cup spring unit 12. While the upper end of the auxiliary piston 11 is in constant communication with the interior of the switching chamber by way of the aperture 8c, the area below the auxiliary piston 11 is connected with the interior of cylinder 8 by way of one or more ducts 8b.
  • Base 8d contains at least one one-way valve 13a which opens toward the inside.
  • the cup spring unit 12 which represents the energy-storing device, is loaded because piston 11 rests with its cylindrical part at neck of the switching part 9 because the latter is held in place by its drive (not shown in detail).
  • the method of operation is as follows: When the switching part 9 is moved downward for the purpose of cut-off by means of a conventional drive, the auxiliary piston 11 can follow accordingly under the influence of the cup spring unit, and thus cause a pre-compression of the quenching gas, so that a blowing flow will be created as soon as the nozzle opening of the insulating nozzle l0 lifts off the switching part 5 which briefly runs along its path, since switching parts 5, 9 will separate practically simultaneously, whereby the cut-off arc will be subjected at the moment of its formation to a blowon under favorable pressure ratio.
  • the auxiliary piston 11 is restricted in its travel by the base 8d, while the switching part 9 will continue to move until it reaches its final position as determined by the drive. For switching-on, the switching part 9 is then moved upward again to the switched-in position, as depicted by FIG. 1, whereby the auxiliary piston 11 is lifted up by neck 9c, thus putting the spring unit 12 under compression again.
  • FIG. 2 shows how the area ratio of auxiliary piston 11 to main piston 9b can be brought up to a desired value without diameter increase.
  • the arrangement shown by this figure provides for a doubling of the auxiliary piston by the presence of two piston surfaces 11a, 11b which are located within the areas of cylinder 8, further subdivided by an additional base 8d.
  • FIG. 3 shows another, very useful, modification where movement of the auxiliary piston 11 to precompress the gas can be released during the initial movement of the switching part 9 in the cut-off operation.
  • This is accomplished in that manner that within the switching part 9 there is pivotally-mounted at point 14a a pawl 14 which uncouples, very shortly after the beginning of the cut-off movement, the auxiliary piston 11, as soon as the support lever 16, due to the bevel at pawl 14, pushes the pawl inward against the return spring 18.
  • the auxiliary piston 11 can thus move freely downward under the influence of springs 12. In this manner it becomes feasible to adjust the travel of the auxiliary piston 11 and the spring characteristics of the spring-loaded device 12 to the specific requirements of the pre-compression and to the energy conditions arising during the cut-in operation.
  • the spring 17 to pivot the pawl about its stationary pivot pin 15.
  • FIG. 4 there is shown the auxiliary piston 11 being provided with a cylindrical projecting part 19 within which the main blow piston 9b is being guided.
  • the auxiliary piston 11' can follow under the influence of the compressed spring 12'.
  • This spring unit 12 is located within an annular space, formed by parts 8' and 19, which is in communication with the switching chamber area (in a manner not shown in detail) to avoid the creation of any interfering pressure conditions within the annular space.
  • the one-way valve 13, shown in FIG. 1, is also present in the bases 8d of the arrangements shown by FIGS. 2 to 4 but is not shown there by drawing.
  • the combination comprising a switch casing, a pair of switch contact members supported within said casing, at least one of said contact members including driving means for effecting engagement and disengagement with the other contact member, a piston and cylinder unit for precompression of the gaseous quenching medium, means forming a passage for delivering the gaseous medium compressed by said piston in said cylinder to the gap formed between said contact members as they disengage, an energy storing device correlated to said piston, and means for coupling said driven contact member to said piston and to said energy storing device only when said driven contact member moves in the contactengaging direction thereby to store energy and simultaneously move said piston in one direction to a position within said cylinder in which the gaseous medium enters said cylinder through valve means, said piston being freed for movement in the opposite direction by the stored energy upon movement of said driven contact member in the contact
  • said means for coupling said driven contact member and piston includes a shouldered portion of said driven contact member engageable with a longitudinally extending part of said piston and which further includes a latching device for said piston carried by said driven contact member and which unlatches from said piston after a predetermined travel of said driven contact member in the contact-disengaging direction thereby releasing said piston for movement to effect the precompression of the gaseous quenching medium.

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  • Circuit Breakers (AREA)
US00202309A 1970-12-01 1971-11-26 Electrical compression switch Expired - Lifetime US3786215A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1781570A CH524886A (de) 1970-12-01 1970-12-01 Elektrischer Kompressionsschalter

Publications (1)

Publication Number Publication Date
US3786215A true US3786215A (en) 1974-01-15

Family

ID=4428297

Family Applications (1)

Application Number Title Priority Date Filing Date
US00202309A Expired - Lifetime US3786215A (en) 1970-12-01 1971-11-26 Electrical compression switch

Country Status (6)

Country Link
US (1) US3786215A (de)
CH (1) CH524886A (de)
DE (2) DE2062865C3 (de)
FR (1) FR2117151A5 (de)
IT (1) IT941824B (de)
NL (1) NL166815C (de)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909572A (en) * 1973-08-31 1975-09-30 Hitachi Ltd Circuit breaking section of a gas circuit breaker of the puffer type
US3924088A (en) * 1973-10-11 1975-12-02 Sprecher & Schuh Ag Gas-blast power switch for high voltage
US3941962A (en) * 1973-01-12 1976-03-02 Sprecher & Schuh Ag Gas blast circuit breaker
US3970811A (en) * 1974-09-16 1976-07-20 I-T-E Imperial Corporation Nozzle and contact arrangement for puffer type interrupter
US3987261A (en) * 1975-02-24 1976-10-19 I-T-E Imperial Corporation Axial blast puffer interrupter with multiple puffer chambers
US4000387A (en) * 1974-05-13 1976-12-28 Westinghouse Electric Corporation Puffer-type gas circuit-interrupter
US4044211A (en) * 1975-08-07 1977-08-23 Westinghouse Electric Corporation Puffer-type compressed-gas circuit-interrupter
US4052577A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Magnetically driven ring arc runner for circuit interrupter
US4090051A (en) * 1974-05-14 1978-05-16 Westinghouse Electric Corp. Energy-storage operating mechanisms for circuit-interrupting structures alone and also for circuit-interrupting structures utilizing serially-related disconnecting-switch structures therewith
US4112276A (en) * 1976-09-28 1978-09-05 Westinghouse Electric Corp. Compressed-gas circuit-interrupter having a sleeve-valve for temporarily blocking the orifice throat
US4123636A (en) * 1975-12-31 1978-10-31 Westinghouse Electric Corp. Double-flow puffer-type single-pressure compressed-gas circuit-interrupter
US4161636A (en) * 1975-06-18 1979-07-17 Bbc Brown, Boveri & Company Limited Arc extinguishing arrangement for gas blast type circuit breaker
US4163131A (en) * 1977-08-11 1979-07-31 Westinghouse Electric Corp. Dual-compression gas-blast puffer-type interrupting device
US4219711A (en) * 1976-10-12 1980-08-26 I-T-E Imperial Corporation Axial blast puffer interrupter with multiple puffer chambers
US4276456A (en) * 1978-10-23 1981-06-30 Westinghouse Electric Corp. Double-flow puffer-type compressed-gas circuit-interrupter
US4322591A (en) * 1979-05-18 1982-03-30 Asea Aktiebolag Circuit breaker with means for producing a flow of arc-extinguishing gas
US4359616A (en) * 1978-09-04 1982-11-16 Mitsubishi Denki Kabushiki Kaisha Self-extinguishing switch
US4379958A (en) * 1979-11-22 1983-04-12 Sprecher & Schuh Ag Gas-blast switch
US4390764A (en) * 1979-05-05 1983-06-28 Licentia Patent-Verwaltungs-G.M.B.H. Puffer-type gas blast switch
US4439652A (en) * 1981-07-02 1984-03-27 Siemens Ag Contact system for gas blast circuit breakers
US4489226A (en) * 1982-09-03 1984-12-18 Mcgraw-Edison Company Distribution class puffer interrupter
WO2011018426A1 (fr) * 2009-08-14 2011-02-17 Areva T&D Sas Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manœuvre reduite

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987262A (en) * 1975-05-12 1976-10-19 Westinghouse Electric Corporation Puffer-type gas-blast circuit-interrupter having variable-area stationary composite piston structure
DE2529623A1 (de) * 1975-07-03 1977-01-20 Licentia Gmbh Elektrischer kompressionsschalter
CH594281A5 (de) * 1976-05-24 1978-01-13 Bbc Brown Boveri & Cie
DE4402121A1 (de) * 1994-01-21 1995-07-27 Siemens Ag Elektrischer Hochspannungs-Leistungsschalter mit einem Heizraum und einer Kompressionsvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE671326C (de) * 1937-10-16 1939-02-04 Voigt & Haeffner Akt Ges Schalter mit Lichtbogenloeschung durch Pressluft
GB516532A (en) * 1938-06-22 1940-01-04 Reyrolle A & Co Ltd Improvements in or relating to electric circuit-breaking devices of the gas-blast type
US2957063A (en) * 1958-03-07 1960-10-18 Westinghouse Electric Corp Pumped-gas circuit interrupter
US2997564A (en) * 1958-09-19 1961-08-22 Westinghouse Electric Corp Circuit interrupter
US3527912A (en) * 1967-01-09 1970-09-08 Merlin Gerin Gas blast circuit breaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE671326C (de) * 1937-10-16 1939-02-04 Voigt & Haeffner Akt Ges Schalter mit Lichtbogenloeschung durch Pressluft
GB516532A (en) * 1938-06-22 1940-01-04 Reyrolle A & Co Ltd Improvements in or relating to electric circuit-breaking devices of the gas-blast type
US2957063A (en) * 1958-03-07 1960-10-18 Westinghouse Electric Corp Pumped-gas circuit interrupter
US2997564A (en) * 1958-09-19 1961-08-22 Westinghouse Electric Corp Circuit interrupter
US3527912A (en) * 1967-01-09 1970-09-08 Merlin Gerin Gas blast circuit breaker

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941962A (en) * 1973-01-12 1976-03-02 Sprecher & Schuh Ag Gas blast circuit breaker
US3909572A (en) * 1973-08-31 1975-09-30 Hitachi Ltd Circuit breaking section of a gas circuit breaker of the puffer type
US3924088A (en) * 1973-10-11 1975-12-02 Sprecher & Schuh Ag Gas-blast power switch for high voltage
US4000387A (en) * 1974-05-13 1976-12-28 Westinghouse Electric Corporation Puffer-type gas circuit-interrupter
US4110579A (en) * 1974-05-14 1978-08-29 Westinghouse Electric Corp. Improved energy-storage operating mechanisms for circuit-interrupting structures utilizing serially-related disconnecting switch structures therewith
US4090051A (en) * 1974-05-14 1978-05-16 Westinghouse Electric Corp. Energy-storage operating mechanisms for circuit-interrupting structures alone and also for circuit-interrupting structures utilizing serially-related disconnecting-switch structures therewith
US3970811A (en) * 1974-09-16 1976-07-20 I-T-E Imperial Corporation Nozzle and contact arrangement for puffer type interrupter
US3987261A (en) * 1975-02-24 1976-10-19 I-T-E Imperial Corporation Axial blast puffer interrupter with multiple puffer chambers
US4161636A (en) * 1975-06-18 1979-07-17 Bbc Brown, Boveri & Company Limited Arc extinguishing arrangement for gas blast type circuit breaker
US4044211A (en) * 1975-08-07 1977-08-23 Westinghouse Electric Corporation Puffer-type compressed-gas circuit-interrupter
US4052577A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Magnetically driven ring arc runner for circuit interrupter
US4123636A (en) * 1975-12-31 1978-10-31 Westinghouse Electric Corp. Double-flow puffer-type single-pressure compressed-gas circuit-interrupter
US4112276A (en) * 1976-09-28 1978-09-05 Westinghouse Electric Corp. Compressed-gas circuit-interrupter having a sleeve-valve for temporarily blocking the orifice throat
US4219711A (en) * 1976-10-12 1980-08-26 I-T-E Imperial Corporation Axial blast puffer interrupter with multiple puffer chambers
US4163131A (en) * 1977-08-11 1979-07-31 Westinghouse Electric Corp. Dual-compression gas-blast puffer-type interrupting device
US4359616A (en) * 1978-09-04 1982-11-16 Mitsubishi Denki Kabushiki Kaisha Self-extinguishing switch
US4276456A (en) * 1978-10-23 1981-06-30 Westinghouse Electric Corp. Double-flow puffer-type compressed-gas circuit-interrupter
US4390764A (en) * 1979-05-05 1983-06-28 Licentia Patent-Verwaltungs-G.M.B.H. Puffer-type gas blast switch
US4322591A (en) * 1979-05-18 1982-03-30 Asea Aktiebolag Circuit breaker with means for producing a flow of arc-extinguishing gas
US4379958A (en) * 1979-11-22 1983-04-12 Sprecher & Schuh Ag Gas-blast switch
US4439652A (en) * 1981-07-02 1984-03-27 Siemens Ag Contact system for gas blast circuit breakers
US4489226A (en) * 1982-09-03 1984-12-18 Mcgraw-Edison Company Distribution class puffer interrupter
WO2011018426A1 (fr) * 2009-08-14 2011-02-17 Areva T&D Sas Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manœuvre reduite
FR2949170A1 (fr) * 2009-08-14 2011-02-18 Areva T & D Sas Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manœuvre reduite

Also Published As

Publication number Publication date
CH524886A (de) 1972-06-30
NL166815C (nl) 1981-09-15
FR2117151A5 (de) 1972-07-21
DE2062865A1 (de) 1972-08-17
DE7047104U (de) 1972-12-21
IT941824B (it) 1973-03-10
NL7116340A (de) 1972-06-05
DE2062865C3 (de) 1980-11-13
DE2062865B2 (de) 1980-03-13

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