GB1209020A - Electric current limiting device - Google Patents
Electric current limiting deviceInfo
- 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
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.
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)
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)
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)
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 |
-
1969
- 1969-07-01 US US838238A patent/US3599137A/en not_active Expired - Lifetime
- 1969-07-04 GB GB33883/69A patent/GB1209020A/en not_active Expired
Cited By (7)
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 |