GB1209020A - Electric current limiting device - Google Patents

Electric current limiting device

Info

Publication number
GB1209020A
GB1209020A GB33883/69A GB3388369A GB1209020A GB 1209020 A GB1209020 A GB 1209020A GB 33883/69 A GB33883/69 A GB 33883/69A GB 3388369 A GB3388369 A GB 3388369A GB 1209020 A GB1209020 A GB 1209020A
Authority
GB
United Kingdom
Prior art keywords
electrode
current limiting
casing
electric current
july
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
Application number
GB33883/69A
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
Priority claimed from JP4688468A external-priority patent/JPS49943B1/ja
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of GB1209020A publication Critical patent/GB1209020A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H87/00—Protective devices in which a current flowing through a liquid or solid is interrupted by the evaporation of the liquid or by the melting and evaporation of the solid when the current becomes excessive, the circuit continuity being reestablished on cooling

Landscapes

  • Fuses (AREA)

Abstract

1,209,020. Electric current limiter. MITSUBISHI DENKI K.K. 4 July, 1969 [5 July, 1968 (2)], No. 33883/69. Heading H1N. In an electric current limiting device in which a fusible and vaporizable material in a bore 29, Fig. 1, automatically returns to the conductive state on cooling, one electrode 14 at least partly encircles the other electrode 12 and is bonded thereto by insulating material 26 such as glass or bonded mica. A body 28 of current limiting material is arranged to back the electrode 14 with the bore 29 extending through the electrode 14 and insulating material 10 to a recess 27 in the electrode 12. In the example shown, the assembly is encased at 10 and the current limiting material is backed by a sealed piston 32 in a cylinder 36 containing highpressure gas or a spring to assist in restoring current flow. The electrode 12 may 'be locked in the sealing material 26 by a flange 20 and passes through threaded insulator 18 and end cap 16. In modifications the electrode 14 may form part of the casing wall and a casing 10 is connected only at one end to form a cylinder for the piston 32. In other modifications both the electrodes 12 and 14 are slidably sealed in an insulating or conductive casing and the body 28 of the current limiting material is.arranged at one end of the casing so that on expansion of the body 28 the electrode assembly moves longitudinally and may be used as an actuator. Suitable materials for current limiting-are given as Na, K, NaK, Ga, Fe, Co, Ag in the form of a solid or powder. Liquids may also be used.
GB33883/69A 1968-07-05 1969-07-04 Electric current limiting device Expired GB1209020A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4688768 1968-07-05
JP4688468A JPS49943B1 (en) 1968-07-05 1968-07-05

Publications (1)

Publication Number Publication Date
GB1209020A true GB1209020A (en) 1970-10-14

Family

ID=26387031

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33883/69A Expired GB1209020A (en) 1968-07-05 1969-07-04 Electric current limiting device

Country Status (2)

Country Link
US (1) US3599137A (en)
GB (1) GB1209020A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2119081A1 (en) * 1970-12-25 1972-08-04 Mitsubishi Electric Corp
FR2631752A1 (en) * 1988-03-02 1989-11-24 Yaskawa Denki Seisakusho Kk FAULT CURRENT LIMITING DEVICE
DE4327357A1 (en) * 1993-08-14 1995-02-16 Abb Patent Gmbh Contact arrangement
DE19916322A1 (en) * 1999-04-12 2000-10-19 Moeller Gmbh Electrode arrangement for electrical devices with liquid metal
DE19918453A1 (en) * 1999-04-23 2000-10-26 Moeller Gmbh Self-recovering current limiting device with liquid metal
DE19918451A1 (en) * 1999-04-23 2000-10-26 Moeller Gmbh Self recovering current limiter, has solid electrodes with liquid metal and insulating bodies between them in pressure vessel having connection channels

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753190A (en) * 1969-06-10 1973-08-14 Mitsubishi Electric Corp Current limiting device
US3838373A (en) * 1970-12-25 1974-09-24 Mitsubishi Electric Corp Self-recovering current limiter
US3735309A (en) * 1971-08-06 1973-05-22 Gen Electric Vapor-state limiter with high pressure housing
JPS5515826B2 (en) * 1973-02-12 1980-04-26
US3806855A (en) * 1973-04-30 1974-04-23 Gen Electric Vapor state current limiting device
US3902150A (en) * 1973-06-08 1975-08-26 Mitsubishi Electric Corp Self-restoring type current limiting device
CH574676A5 (en) * 1974-08-29 1976-04-15 Bbc Brown Boveri & Cie
US3957329A (en) * 1974-11-01 1976-05-18 I-T-E Imperial Corporation Fault-current limiter for high power electrical transmission systems
US5051649A (en) * 1989-09-08 1991-09-24 John F. Waymouth Intellectual Property And Education Trust Arc discharge lamp with liquid metal and heating means

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2087905A (en) * 1935-12-07 1937-07-27 Perma Fuse Co Fuse
US2505193A (en) * 1946-02-08 1950-04-25 Loporto Frank Fuse plug
US3281559A (en) * 1964-05-21 1966-10-25 United Carr Inc Thermal fuse having telescopically received contact members
US3501730A (en) * 1967-02-25 1970-03-17 Mitsubishi Electric Corp Current limiting equipment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2119081A1 (en) * 1970-12-25 1972-08-04 Mitsubishi Electric Corp
FR2631752A1 (en) * 1988-03-02 1989-11-24 Yaskawa Denki Seisakusho Kk FAULT CURRENT LIMITING DEVICE
DE4327357A1 (en) * 1993-08-14 1995-02-16 Abb Patent Gmbh Contact arrangement
DE19916322A1 (en) * 1999-04-12 2000-10-19 Moeller Gmbh Electrode arrangement for electrical devices with liquid metal
DE19918453A1 (en) * 1999-04-23 2000-10-26 Moeller Gmbh Self-recovering current limiting device with liquid metal
DE19918451A1 (en) * 1999-04-23 2000-10-26 Moeller Gmbh Self recovering current limiter, has solid electrodes with liquid metal and insulating bodies between them in pressure vessel having connection channels
US6714115B1 (en) 1999-04-23 2004-03-30 Moeller Gmbh Self-recovering current limiting device with liquid metal

Also Published As

Publication number Publication date
US3599137A (en) 1971-08-10

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414A Case decided by the comptroller ** specification amended (sect. 14/1949)
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee