EP0192251A2 - Elektrode eines Vakuumschalters - Google Patents

Elektrode eines Vakuumschalters Download PDF

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Publication number
EP0192251A2
EP0192251A2 EP86102138A EP86102138A EP0192251A2 EP 0192251 A2 EP0192251 A2 EP 0192251A2 EP 86102138 A EP86102138 A EP 86102138A EP 86102138 A EP86102138 A EP 86102138A EP 0192251 A2 EP0192251 A2 EP 0192251A2
Authority
EP
European Patent Office
Prior art keywords
electrode
circuit breaker
vacuum circuit
sub
main electrode
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.)
Withdrawn
Application number
EP86102138A
Other languages
English (en)
French (fr)
Other versions
EP0192251A3 (de
Inventor
Mitsumasa C/O Tsushinki Seisakusho Yorita
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0192251A2 publication Critical patent/EP0192251A2/de
Publication of EP0192251A3 publication Critical patent/EP0192251A3/de
Withdrawn legal-status Critical Current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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H33/6644—Contacts; Arc-extinguishing means, e.g. arcing rings having coil-like electrical connections between contact rod and the proper contact

Definitions

  • the present invention relates to electrodes of a vacuum circuit breaker, and especially to the electrode construction having sub-electrode on the back face of main electrode.
  • the vacuum circuit breaker comprises, an upper and a lower electrodes 3 and 3' facing to each other, a pair of conductor rods 1 and 2, a vacuum tube 6 to define a chamber, a fixed base 5a, a moving base 5b, shield members 9 and a bellows 10.
  • the upper electrode 3 is fixed on the fixed base 5a via the conductor rod 1 connected inbetween, and the lower electrode 3' is mounted on the moving base 5b via the conductor rod 2 and the bellows 10.
  • FIG.2 is a perspective vies of a conventional electrode of vacuum circuit breaker, which is shown, for example, in the Japanese published patent unexamined application Sho 58-100325.
  • the top part of the conductor rod 1 has a cylinder part la, which fits into a center hole 7e of a connection ring 7a of a connection member 7.
  • the connection member 7 has four arms 7b extended in radial directions, and the tip part of the arms 7b have respectively contact parts 7c in vertically upper direction of the arms 7b.
  • the main electrode 3 is fixed on the connection member 7, which has a disk part 3a, and four coil parts 3b all extending in the same tangential direction along and outside the circumference.
  • foundation parts 3c of the coil parts 3b are formed continuously from the disk part 3a.
  • the back faces 3d of the end tip parts of the coil parts 3b and the corresponding front faces 7d of the contact parts 7c of the connection member 7 are respectively connected with each other.
  • the main electrode 3 and the conductor rod 1 are electrically connected with each other.
  • the stick part 8a of the fixing member 8 is fitted into the hole lc of the cylinder part la of the conductor rod 1, and the cylinder part la is fitted in the hole 7e at the face of the center part of the connection member 7.
  • a pair of conductor rods 1, the connection members 7, the main electrodes 3 and the fixing members 8 are disposed against each other in a vacuum tube 6, which is shown in FIG.l.
  • the vacuum circuit breaker has such constitution as mentioned above, for making the magnetic field in the axial direction in order to effectively blow out the arc to avoid melting down of the electrode.
  • a material of the main electrode 3 generally has a high resistance, the electric current from the main electrode 3 to the conductor rod 1 does not flow through the path of the current formed of the disk part 3a of the main electrode 3, through the base part 3c, the coil part 3b, the back part 3d, the contact part 7c of the connection member 7, the arm 7b, the connection ring 7a and to the conductor rod 1, but actual current flows through a path from the main electrode 3, through the fixing member 8 and to the conductor rod 1, (this is because the disk part 3a, the coil part 3b, the base part 3c and the back part 3d which are parts of the main electrode 3 have a low conductivity.
  • the magnetic field in axial direction is not formed effectively.
  • the purpose of the present invention is to provide an improved electrode of vacuum circuit breaker, having the conventional coil action part on its circumference and further having a sub-electrode part which is made of higher conductivity materials than the material of the main electrode,thereby to enable satisfactory function of arc extinguishing.
  • An electrode of vacuum circuit breaker in accordance with the present invention comprises;
  • FIG.4 A first preferred embodiment is described with reference to FIG.4, FIG.5, FIG.6(a) and (b).
  • the'top part of a conductor rod 101 has a cylinder part lOla, which fits into the center hole 107e of a connection ring 107a of a connection member 107.
  • the connection member 107 also has four arms 107b extended in radial directions, and the tip part of the arms 107b have respectively contact parts 107c in vertically upper direction of the arms 107b.
  • a sub-electrode 104 is fixed on the connection member 107, which has disk part 104a and four coil parts 104b all extending in the same tangential direction along and outside the circumference. And the foundation parts 104c of the coil parts 104b are formed continuously from the disk part 104a.
  • the back faces 104d of the end tip parts of the coil part 104b and the corresponding front faces 107d of the contact parts 107c of the connection member 107 are respectively connected with each other.
  • a main electrode 103 which is made of a known electrode alloy material, and has the same shape as that of the sub-electrode 104, is bonded on the sub-electrode 104 by brazing or the like. So the main electrode 103 and the sub-electrode 104 are electrically and mechanically connected with each other.
  • FIG.1 A pair of such electrodes are ordinary used as shown in FIG.1 to constitute a switch.
  • the bellows 10 is extended and the electrodes 3 and 3' are adhered to each other, and in turning-off of the swich, the electrodes 3 and 3' are pulled apart of each other. At that time, an arc spot is produced between the two electrodes.
  • FIG.5 shows an arc produced in the center point P of main electrode 103. Electric currents 1 1 and 1 2 are generated by the arc.
  • the electric current I 1 flows from the point P through the center part 103a, the foundation part 103c, the coil part 103b, the back part 103d of coil part 103b, the coil part of sub-electrode 104b, the back part 104b, the contact part 107c of the connection member 107, the arm 107b, the connection ring 107a and to the conductor rod 101
  • the electric current 1 2 flows from the point P through the center part of sub-electrode 104a, the foundation of sub-electrode 104c, the coil part of sub-electrode 104b, the back part of the coil part of sub-electrode 104d, the contact part 107c of the connection member 107, the arm 107b, the connection ring 107a and to the conductor rod 101.
  • the material of the main electrode 103 is Cu alloy, Ag alloy or the like, their electric conductivity is about 20 - 50 % of the conductivity of the pure Cu electrode, and the material of the sub-electrode 104 is Cu, it has about 100 % of the electric conductivity.
  • the conductivity of the material of the main electrode 103 is as high as 20 % of the conductivity of the material of the sub-electrode 104, in other words, the main electrode 103 has a resistance of as high as five times of that of the sub-electrode 104, and the thickness of the main electrode 103 and that of the sub-electrode 104 are equal, then the composite effective resistance of the embodiment is as high as about 33 % of resistance of conventional electrode shown in FIG.2, which is made of the electrode alloy metal and has a thickness equal to the total thickness of the main electrode 103 and the sub-electrode 104.
  • the total thickness of the main electrode and the sub-electrode 104 in accordance with the present invention can be made thinner than that of the conventional electrode, which can make the same magnitude of electric current for making the arc extinguish magnetic field effectively.
  • the main electrode 103 has the same conductivity as the sub-electrode 104
  • the total thickness of the main electrode 103 and the sub-electrode 104 is equal to that of the conventional electrode.
  • the material of the main electrode is generally expensive, and the material of the sub-electrode is relatively inexpensive.
  • FIG.6(a) shows the cross-sectional side view of the electrode having a terraced shape
  • FIG.6(b) shows the cross-sectional side view of the electrode having slant periphery shape. These shapes are designed for confining the arc spot in the center part of the electrode.
  • FIG.7(a), FIG.7(b) and FIG.7(c) show another embodiment in accordance with the present invention.
  • conductor rods 151 and 151' respectively have one connection arm 157 and 157'.
  • main electrodes 153 and 153', and sub-electrodes 154 and 154' respectively have a center slit.
  • Holding members 158 and 158' are respectively disposed between the conductor rods 151, 151' and the sub-electrodes 154, 154', and respective holding members 158 and 158' are made of high electric l esistance material.
  • the electric currents does not flow from the conductor rod 151 through the holding member 158 to the sub-electrode 154, but disirably flow as designated by arrow marks.
  • the magnetic field is generated cirtainly in the axial direction.
  • the arc is generated between P and P'.
  • FIG.8(a), FIG.8(b) and FIG.8(c) show still other embodiment in accordance with the present invention.
  • This embodiment does not have any connection member, and conductor rod is thicker than the other embodiment shown in FIG.7s.
  • the contact part of each of the conductor rods 161 and 161' is constituted by a low electric resistance part 165 and 165' and a high electric resistance part 168 and 168'.
  • the high electric resistance part 168 and 168' have a little over three quarters circular region, which are hatched with dotted lines in FIG.8(a),FIG.8(b) and FIG.8(c).
  • the main electrodes 163 and 163', and the sub-electrodes 164 and 164' have respectively cross- shaped slit 163a, 163'a.
  • the electric current flows from the conductor rod 161 through the low electric resistance part 165 and the sub-electrode 164 to the main electrode 163.
  • the magnetic field is generated in the axial direction, and the arc spot is generated between P and P'.
  • FIG.9(a), FIG.9(b) and FIG.9(c) show still other embodiment in accordance with the present invention.
  • conductor rods 171 and 171' have one connection arm 177 and 177' of low electric resistance, respectively, and the cor tact parts 178 and 178' of the conductor rods 171 and 171' are made of high electric resistance material, respectively.
  • FIG.10, FIG.11 and FIG.12 are plan views of main electrodes which are used in the embodiment of FIG.9s.
  • the sub-electrodes have respectivrely the same plan views in each case.
  • FIG.13(a), FIG.13(b) and FIG.13(c) show still other embodiment in accordance with the present invention.
  • the main electrodes of course the sub-electrodes have plural slits in parallel. In this case, plural number of arcs are generated as shown in the figures.
  • FIG.14(a), FIG.14(b), FIG.15(a) and FIG.15(b) are the plan view of main electrodes which are used in the embodiment of FIG.13(a), FIG.13(b) and FIG.13(c).
  • FIG.16(a), FIG.16(b) and FIG.16(c) show still other embodiment in accordance with the present invention.
  • the connection arms 197 and 197' face alternately each other.
  • FIG.17(a), FIG.17(b) and FIG.17(c) show still other embodiment in accordance with the present invention.
  • the connection arms 207 and 207' confront with each other.
  • the electric currents flow as lines designated by arrow marks, and arcs occur plurally as shown in the figures.
  • FIG.18(a), FIG.18(b) and FIG.18(c) show still other embodiment in accorcance with the present invention.
  • FIG.19(a), FIG.19(b) and FIG.19(c) show still other embodiment in accordance with the present invention.
  • FIG.20(a) and FIG.20(b) show still other embodiment in accordance with the present invention.
  • a connection member 237 has a pair of opposit arms, and a main electrode 233 has terraced shape.
  • FIG.21 and FIG.22 are the plan view of the main electrode 233 used in the embodiment shown in FIG.21.
  • FIG.23 shows still other embodiment in accordance with the present invention.
  • the connection member 247 has three arms 247a.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP86102138A 1985-02-22 1986-02-19 Elektrode eines Vakuumschalters Withdrawn EP0192251A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP34785/85 1985-02-22
JP3478585A JPS61195528A (ja) 1985-02-22 1985-02-22 真空しや断器の電極構造

Publications (2)

Publication Number Publication Date
EP0192251A2 true EP0192251A2 (de) 1986-08-27
EP0192251A3 EP0192251A3 (de) 1989-02-22

Family

ID=12423929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102138A Withdrawn EP0192251A3 (de) 1985-02-22 1986-02-19 Elektrode eines Vakuumschalters

Country Status (2)

Country Link
EP (1) EP0192251A3 (de)
JP (1) JPS61195528A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003136A1 (en) * 1985-11-12 1987-05-21 Mitsubishi Denki Kabushiki Kaisha Vacuum interrupter
EP0597434A3 (de) * 1992-11-10 1995-02-08 Mitsubishi Electric Corp Vakuumschalter.
US5585696A (en) * 1991-12-06 1996-12-17 Mitsubishi Denki Kabushiki Kaisha High current density glow discharge switch
WO2002071430A1 (en) * 2001-02-28 2002-09-12 Boe Technology Group Co., Ltd. An integrated contact for power switchgear
CN112530735A (zh) * 2020-12-18 2021-03-19 西安高压电器研究院有限责任公司 一种双回路触头结构及真空灭弧室

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2743955B2 (ja) * 1992-11-10 1998-04-28 三菱電機株式会社 真空バルブ

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5826132B2 (ja) * 1978-11-22 1983-06-01 株式会社日立製作所 真空しや断器
JPS5784530A (en) * 1980-11-17 1982-05-26 Hitachi Ltd Vacuum breaker
DE3173171D1 (en) * 1980-12-22 1986-01-23 Mitsubishi Electric Corp Vacuum interrupter
JPS58100325A (ja) * 1981-12-09 1983-06-15 三菱電機株式会社 真空しや断器

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003136A1 (en) * 1985-11-12 1987-05-21 Mitsubishi Denki Kabushiki Kaisha Vacuum interrupter
US4855547A (en) * 1985-11-12 1989-08-08 Mitsubishi Denki Kabushiki Kaisha Vacuum interrupter
US5585696A (en) * 1991-12-06 1996-12-17 Mitsubishi Denki Kabushiki Kaisha High current density glow discharge switch
EP0597434A3 (de) * 1992-11-10 1995-02-08 Mitsubishi Electric Corp Vakuumschalter.
US5495085A (en) * 1992-11-10 1996-02-27 Mitsubishi Denki Kabushiki Kaisha Vacuum interrupter
US5597993A (en) * 1992-11-10 1997-01-28 Mitsubishi Denki Kabushiki Kaisha Vacuum interrupter
US5646386A (en) * 1992-11-10 1997-07-08 Mitsubishi Denki Kabushiki Kaisha Vacuum interrupter
WO2002071430A1 (en) * 2001-02-28 2002-09-12 Boe Technology Group Co., Ltd. An integrated contact for power switchgear
US6891121B2 (en) 2001-02-28 2005-05-10 Boe Technology Group Co., Ltd. Integrated contact for power switchgear
CN112530735A (zh) * 2020-12-18 2021-03-19 西安高压电器研究院有限责任公司 一种双回路触头结构及真空灭弧室

Also Published As

Publication number Publication date
JPS61195528A (ja) 1986-08-29
EP0192251A3 (de) 1989-02-22

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Inventor name: YORITA, MITSUMASAC/O TSUSHINKI SEISAKUSHO