EP0917171A3 - Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes thereof - Google Patents

Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes thereof Download PDF

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Publication number
EP0917171A3
EP0917171A3 EP98121200A EP98121200A EP0917171A3 EP 0917171 A3 EP0917171 A3 EP 0917171A3 EP 98121200 A EP98121200 A EP 98121200A EP 98121200 A EP98121200 A EP 98121200A EP 0917171 A3 EP0917171 A3 EP 0917171A3
Authority
EP
European Patent Office
Prior art keywords
electrodes
vacuum
breaker
bulb
vacuum bulb
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Withdrawn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
EP98121200A
Other languages
German (de)
French (fr)
Other versions
EP0917171A2 (en
Inventor
Shigeru Kikuchi
Masato Kobayashi
Katsuhiro Komuro
Toru Tanimizu
Yoshimi Hakamata
Kathumi Kuroda
Hitoshi Okabe
Noboru Baba
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP0917171A2 publication Critical patent/EP0917171A2/en
Publication of EP0917171A3 publication Critical patent/EP0917171A3/en
Withdrawn legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/664Contacts; Arc-extinguishing means, e.g. arcing rings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/02Contacts characterised by the material thereof
    • H01H1/0203Contacts characterised by the material thereof specially adapted for vacuum switches
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/664Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H33/6643Contacts; Arc-extinguishing means, e.g. arcing rings having disc-shaped contacts subdivided in petal-like segments, e.g. by helical grooves

Abstract

The invention aims at providing a vacuum circuit-breaker, a vacuum bulb used therein and electrodes for the vacuum bulb, which can reduce the manufacturing cost while being of high performance and compact in size. The invention resides in a vacuum circuit-breaker, a vacuum bulb and electrodes for the vacuum bulb, which are characterized in that fixed and movable electrodes (30a, 30b) each comprise arc electrodes (1), whose entire surfaces, mutually facing each other, are made of an alloy containing a refractory metal and a highly conductive metal, and electrode rods (4) of a highly conductive metal supporting the respective arc electrodes, and that each arc electrode and the mating electrode rod are integrally formed by means of solid-phase diffusion bonding.
Figure 00000001
EP98121200A 1997-11-14 1998-11-13 Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes thereof Withdrawn EP0917171A3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP313105/97 1997-11-14
JP31310597 1997-11-14
JP31310597 1997-11-14

Publications (2)

Publication Number Publication Date
EP0917171A2 EP0917171A2 (en) 1999-05-19
EP0917171A3 true EP0917171A3 (en) 1999-07-28

Family

ID=18037221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121200A Withdrawn EP0917171A3 (en) 1997-11-14 1998-11-13 Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes thereof

Country Status (1)

Country Link
EP (1) EP0917171A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6248969B1 (en) * 1997-09-19 2001-06-19 Hitachi, Ltd. Vacuum circuit breaker, and vacuum bulb and vacuum bulb electrode used therefor
JP4197702B2 (en) * 2006-01-31 2008-12-17 株式会社日立製作所 Vacuum insulated switchgear
JP5409739B2 (en) * 2011-09-27 2014-02-05 株式会社日立製作所 Junction structure, electrical contact, and manufacturing method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828428A (en) * 1972-09-25 1974-08-13 Westinghouse Electric Corp Matrix-type electrodes having braze-penetration barrier
US4743718A (en) * 1987-07-13 1988-05-10 Westinghouse Electric Corp. Electrical contacts for vacuum interrupter devices
DE19513790A1 (en) * 1994-04-11 1995-10-19 Hitachi Ltd Vacuum switching stage with low pressure valve
RU2063087C1 (en) * 1994-03-25 1996-06-27 Товарищество с ограниченной ответственностью "КАНПАК" Contact manufacturing process for vacuum arc-control chambers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828428A (en) * 1972-09-25 1974-08-13 Westinghouse Electric Corp Matrix-type electrodes having braze-penetration barrier
US4743718A (en) * 1987-07-13 1988-05-10 Westinghouse Electric Corp. Electrical contacts for vacuum interrupter devices
RU2063087C1 (en) * 1994-03-25 1996-06-27 Товарищество с ограниченной ответственностью "КАНПАК" Contact manufacturing process for vacuum arc-control chambers
DE19513790A1 (en) * 1994-04-11 1995-10-19 Hitachi Ltd Vacuum switching stage with low pressure valve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section EI Week 9710, Derwent World Patents Index; Class X13, AN 97-107019, XP002104631 *

Also Published As

Publication number Publication date
EP0917171A2 (en) 1999-05-19

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