US3924087A - Vacuum circuit interruptor - Google Patents

Vacuum circuit interruptor Download PDF

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Publication number
US3924087A
US3924087A US402129A US40212973A US3924087A US 3924087 A US3924087 A US 3924087A US 402129 A US402129 A US 402129A US 40212973 A US40212973 A US 40212973A US 3924087 A US3924087 A US 3924087A
Authority
US
United States
Prior art keywords
envelope
contact
secured
insulators
sleeve
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
US402129A
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English (en)
Inventor
Jan Christiaan Clason
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.)
Hazemeijer BV
Original Assignee
Hazemeijer BV
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 Hazemeijer BV filed Critical Hazemeijer BV
Application granted granted Critical
Publication of US3924087A publication Critical patent/US3924087A/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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings

Definitions

  • ABSTRACT An interruptor having a cylindrical metallic envelope and two cylindrical insulators secured to the envelope on both ends thereof in a vacuum tight fashion.
  • the 72/3302 free ends of the cylindrical insulators support contact rods in a vacuum tight fashion.
  • Contact members are ZOO/144 B then respectively secured to the contact rods. which H01 33/66 members are arranged within the envelope.
  • the 200/144 B contact rod of the movable contact member is secured to the associated insulator by means of a bellows.
  • Both References Cited of the insulators have their ends secured to the enve- UNITED STATES PATENTS lope and are directed towards one another and disposed within the metallic envelope. 3,590,185 6/1971 200/144 B 3,674,958 Attia et a1. 200/144 B 2 ai 1 Drawlng Figure Jan Christiaan Clason, Hen Netherlands Hazemeijer B.V., Netherlands Oct. 1, 1973 VACUUM CIRCUIT INTERRUPTOR Inventor:
  • the invention relates to a vacuum circuit interruptor.
  • Such an interruptor includes a cylindrical metallic envelope and two cylindrical insulators secured to the envelope on both ends thereof in a vacuum tight fashion. The free ends of the cylindrical insulators support the contact rods in a vacuum tight fashion, to which contact rods the two contact members are secured, which are arranged in said envqgpe. The contact rod of the movable contact member is secured to the associated insulator by means of a bellows.
  • Such apparatus is disclosed in the US. Pat. No. 3,280,286.
  • the known vacuum circuit interruptor comprises a stainless steel envelope to which the insulators are secured in such a way that with respect to the envelope they are directed outwardly and point away from one another.
  • One of the insulators at its free end is closed by a metal ring, to which the contact rod of the stationary contact member is secured in a vacuum tight fashion.
  • the other insulator at its free end is secured vacuum tight to a bellows, which for the greater part is disposed in the insulator, the free end of the bellows being coupled to the contact rod of the movable contact member.
  • the volume of the vacuum space of the known circuit interruptor is relatively small so that the vapour pressure in the interruptor during the interrupting process will increase rapidly and may exceed a dangerous value of between to 10* mm mercury at which pressure the mean free path of the electrons becomes smaller than the maximum contact member spacing, so that a self maintained plasma discharge is formed, which will not extinguish by itself. Accordingly the circuit interruptor cannot interrupt the current flow anymore.
  • the contact rods of the known vacuum interruptor are relatively long and since the material thereof is usually soft copper, the rods can easily be deformed.
  • the invention has for its object to eliminate the above defects and provides a vacuum circuit interruptor of the type specified above, which is characterized in that the two insulators from their ends which are secured to the envelope are directed towards one another and are disposed within said envelope.
  • each insulator is provided with a sleeve of elastic insulating material and a stub of non-elastic insulating material, such as moulding resin, pressed into the sleeve, in such a way that no voids are present in the interface between the insulator and the sleeve nor in the interface between the sleeve and the insulating stub, each stub having an axial passage, in which the connecting rod of the associated contact member is disposed.
  • the flash over voltage between the contact members of the interruptor around the exterior of the vacuum space is remarkably increased.
  • the insulators may be arranged shorter.
  • the sleeves are integral with an insulating sheath, which is arranged across the external surface of the metal envelope.
  • the sheath is not intended to prevent the metal envelope from being touched, since the envelope is normally not live, but to further increase the flash over voltage.
  • the vacuum interruptor comprises a cylindrical metallic envelope 1, to which two insulators 2 and 3 respectively, are secured, which are directed inwardly. These three members are disposed on one and the same axis.
  • the connections between the insulators 2 and 3 on the one hand and the envelope 1 on the other hand are vacuum tight.
  • a contact rod 5 is secured by means of a profiled ring 10.
  • the contact rod 5 in turn supports the stationary contact member 7.
  • the other insulator 2 is connected to a bellows 9 by means of a profiled ring member 18, and the other end of the bellows 9 supports the contact rod 4 for the movable contact member 6.
  • the inter-cylindrical surface of the insulator 3 is provided with a rubber sleeve 16, an insulating stub 20 being pressed into the sleeve.
  • the pressure between the insulator 3 and the sleeve 16 as well as between the sleeve 16 and the insulating stub 20 is so high that no voids are present in the interfaces between the insulator 3 and the sleeve 16 on the one hand and between the sleeve 16 and the insulating stub 20 on the other hand.
  • a connecting rod 22 is arranged in the insulating stub 20, i.e. the stub 20 is moulded around the connecting rod, and the connecting rod 22 is secured to the contact rod 5 by means of a bolt 24.
  • the upper insulator 2 is in a similar way provided with an elastic insulating sleeve 15, in which is pressed the insulating stub 19.
  • an elastic insulating sleeve 15 in which is pressed the insulating stub 19.
  • the contact rod 21 is movably arranged in the insulating stub 19 to enable the movable contact member to be operated.
  • the connecting rod 21 is connected to the contact rod 4 through the bolt 23.
  • the circuit interruptor is illustrated in its opened position and it can be closed by operating the contact rod 21 in the direction of the arrow.
  • the metallic envelope 1 is provided with an insulating elastic sheath 17, which is integral with the two sleeves l and 16. It is observed that the two connecting rods 21 and 22 are disposed outside the vacuum space and hence need not be made of copper but may consist of alloyed copper or hard drawn copper, for example, so that deformations of the connecting rods are not to be feared.
  • circuit interruptor according to the invention is well suited to be includedin a com- 4 pletely insulated high voltage apparatus. which is insulated with moulding resin. for example,
  • a vacuum circuit interruptor comprising: a cylindrical metallic envelope; two cylindrical insulators secured to said envelope on both ends thereof in a vacuum tight fashion, said two insulators from the ends which are secured to said envelope being directed towards one another and disposed within said envelope; contact rods supported by free ends of said cylindrical insulators in a vacuum tight fashion; two contact members secured to said contact rods, said contact members being arranged in said envelope; one of said contact members being movable and the associated said contact rod being secured to the associated said insulator by a bellows; the outer cylindrical surface of each said insulator being provided with a sleeve of elastic insulating material, a stub of non-elastic insulating material, pressed into said sleeve, in such a manner as to be free of voids in the interface between said insulator and the associated said sleeve and in the interface between said sleeve and said insulating stub, and each stub having an axial passage, in which the respective contact rod of

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
US402129A 1972-10-02 1973-10-01 Vacuum circuit interruptor Expired - Lifetime US3924087A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL727213302A NL152107B (nl) 1972-10-02 1972-10-02 Vacuuemschakelaar.

Publications (1)

Publication Number Publication Date
US3924087A true US3924087A (en) 1975-12-02

Family

ID=19817053

Family Applications (1)

Application Number Title Priority Date Filing Date
US402129A Expired - Lifetime US3924087A (en) 1972-10-02 1973-10-01 Vacuum circuit interruptor

Country Status (15)

Country Link
US (1) US3924087A (de)
JP (1) JPS5319103B2 (de)
AT (1) AT357227B (de)
AU (1) AU467510B2 (de)
BE (1) BE805291A (de)
CA (1) CA1011378A (de)
CH (1) CH556093A (de)
DK (1) DK135194B (de)
ES (1) ES419249A1 (de)
FR (1) FR2201532B1 (de)
GB (1) GB1435610A (de)
IT (1) IT999595B (de)
NL (1) NL152107B (de)
SE (1) SE388070B (de)
ZA (1) ZA737668B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072837A (en) * 1975-12-29 1978-02-07 General Electric Company High continuous current vacuum-type circuit interrupter
US4757166A (en) * 1987-06-15 1988-07-12 Westinghouse Electric Corp. Vacuum interrupter with ceramic enclosure
US4880947A (en) * 1988-06-29 1989-11-14 Westinghouse Electric Corp. Vacuum interrupter with simplified enclosure and method of assembly
CN103531398A (zh) * 2012-07-03 2014-01-22 西门子公司 真空开关管
CN109478481A (zh) * 2016-07-20 2019-03-15 西门子股份公司 加固的接触棒

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5715319A (en) * 1980-07-01 1982-01-26 Meidensha Electric Mfg Co Ltd Vacuum breaker and method of producing same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590185A (en) * 1968-12-16 1971-06-29 Allis Chalmers Mfg Co Vacuum interrupter with single insulating member having conical exterior attaching surfaces and supporting a floating shield
US3674958A (en) * 1970-11-23 1972-07-04 Allis Chalmers Mfg Co Vacuum circuit interrupter
US3705281A (en) * 1971-04-29 1972-12-05 Joslyn Mfg & Supply Co Bushing insulator improvements for a dead tank vacuum switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590185A (en) * 1968-12-16 1971-06-29 Allis Chalmers Mfg Co Vacuum interrupter with single insulating member having conical exterior attaching surfaces and supporting a floating shield
US3674958A (en) * 1970-11-23 1972-07-04 Allis Chalmers Mfg Co Vacuum circuit interrupter
US3705281A (en) * 1971-04-29 1972-12-05 Joslyn Mfg & Supply Co Bushing insulator improvements for a dead tank vacuum switch

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072837A (en) * 1975-12-29 1978-02-07 General Electric Company High continuous current vacuum-type circuit interrupter
US4757166A (en) * 1987-06-15 1988-07-12 Westinghouse Electric Corp. Vacuum interrupter with ceramic enclosure
US4880947A (en) * 1988-06-29 1989-11-14 Westinghouse Electric Corp. Vacuum interrupter with simplified enclosure and method of assembly
CN103531398A (zh) * 2012-07-03 2014-01-22 西门子公司 真空开关管
CN103531398B (zh) * 2012-07-03 2015-11-18 西门子公司 真空开关管
CN109478481A (zh) * 2016-07-20 2019-03-15 西门子股份公司 加固的接触棒

Also Published As

Publication number Publication date
ATA842773A (de) 1979-11-15
ES419249A1 (es) 1976-03-01
CA1011378A (en) 1977-05-31
DE2347945A1 (de) 1974-04-11
BE805291A (nl) 1974-03-25
SE388070B (sv) 1976-09-20
ZA737668B (en) 1974-08-28
AT357227B (de) 1980-06-25
AU6073873A (en) 1975-03-27
JPS49132563A (de) 1974-12-19
NL152107B (nl) 1977-01-17
FR2201532A1 (de) 1974-04-26
AU467510B2 (en) 1975-12-04
IT999595B (it) 1976-03-10
CH556093A (de) 1974-11-15
FR2201532B1 (de) 1977-09-09
DK135194C (de) 1977-10-03
GB1435610A (en) 1976-05-12
DE2347945B2 (de) 1976-09-02
JPS5319103B2 (de) 1978-06-19
DK135194B (da) 1977-03-14
NL7213302A (de) 1974-04-04

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